207 results on '"Système nerveux autonome"'
Search Results
2. Fonction cardiaque et trouble de stress post-traumatique: revue de la littérature et étude de cas.
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Singh, Jyotpal, Carleton, R. Nicholas, and Neary, J. Patrick
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Introduction. Alors qu'on sait que le trouble de stress post-traumatique (TSPT) peut entraîner une augmentation du tonus sympathique, ses effets sur le cycle cardiaque ont été peu étudiés. Méthodologie. Nous avons réalisé une revue de la littérature en interrogeant les bases de données PubMed, MEDLINE et Web of Science. Les articles traitant des modifications de nature échocardiographique en lien avec le TSPT ou des symptômes connexes et traitant des associations entre les deux ont été synthétisés pour cette revue de la littérature. Nous avons également inclus les données d'une étude de cas dans laquelle les intervalles de temps et les paramètres de contractilité du cycle cardiaque ont été évalués par séismocardiographie chez un participant âgé de 33 ans qui portait un capteur cardiaque non invasif et qui a été exposé à des événements potentiellement traumatiques sur le plan psychologique. Les intervalles évalués étaient le temps de systole, le temps de contraction isovolumique (TCIV) et le temps de relaxation isovolumique (TRIV). Nous avons calculé les indices de performance systolique (TCIV/systole), diastolique (TRIV/systole) et myocardique [(TCIV+TRIV)/systole]. Résultats. La revue de la littérature a permis de recenser 55 articles, dont 14 portant sur l'évaluation de la fonction cardiaque par échocardiographie chez des patients présentant des symptômes de TSPT. La dysfonction cardiaque variait selon les études, avec la présence d'atteintes diastoliques et systoliques chez des patients ayant un TSPT. L'étude de cas montre que le stress lié au travail augmente les indices de performance cardiaque, ce qui évoque un stress ventriculaire accru et vient confirmer les résultats dont on dispose dans la littérature. Conclusion. D'après les résultats de notre revue de la littérature, l'évaluation de la fonction cardiaque chez les patients atteints de TSPT devrait faire l'objet d'une approche contrôlée. Quant à l'étude de cas, les résultats laissent penser que les épisodes de stress aigu peuvent altérer la fonction cardiaque et que le stress prolongé lié au travail pourrait induire des changements dans la fonction cardiaque. Il est possible d'utiliser la surveillance cardiaque de façon prospective pour déceler les changements provoqués par une exposition à des événements potentiellement traumatiques sur le plan psychologique, cette exposition pouvant conduire au développement de symptômes de TSPT. [ABSTRACT FROM AUTHOR]
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- 2023
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3. Effects of 8-week of training on heart rate variability, overtraining state and performance in international young swimmers.
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Barragán, R., González-Mohíno, F., Veiga, S., and Juárez Santos-García, D.
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HEART beat , *SWIMMERS , *OVERTRAINING , *FATIGUE (Physiology) , *EXERCISE - Abstract
of this study was to determine the effects of different training periods and tapering during a macrocycle on heart rate variability (HRV), overtraining states and performance in young elite swimmers. Fifteen swimmers (6 men, 9 women) completed an 8-week training period divided into a basic, specific, competitive and transition blocks. HRV measures were recorded 3 days per week before the morning training session in supine position for 5 minutes. Overtraining state was recorded through the questionnaire of early clinical symptoms of the overtraining syndrome (QSFMS), which one considers different contributions to fatigue linked to physical exercising. The overtraining state was registered when the score exceeded 20 negative items out of 54. Training intensity distribution in five zones and training volume were quantified. show that, in these elite young swimmers, no changes in HRV were found during the 8-week training period with an average performance improvement (∼3%) in the competition block. In addition, there was no relationship between the QSFMS score and HRV. it appears that HRV indices within normal baseline levels could help to develop a well-managed and periodized training program that allows improves the performance in young elite swimmers. [ABSTRACT FROM AUTHOR]
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- 2023
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4. Acute effects of energy drink on heart rate variability recovery after exercise: A systematic review and meta-analysis.
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Porto, A.A., Benjamim, C.J.R., Almeida Gonzaga, L., Garner, D.M., and Valenti, V.E.
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PHYSIOLOGICAL effects of energy drinks , *HEART beat , *EXERCISE physiology , *SAMPLE size (Statistics) , *CONFIDENCE intervals - Abstract
The influence of energy drink (ED) on the analysis of autonomic parameters through post-exercise heart rate variability (HRV) remains undefined. We propose to assess the results of the principal studies that estimated the acute effects of ED intake on HRV recovery after effort. Searches were completed in the following databases: PubMed, MEDLINE via Ovid, Embase, Web of Science, CINAHL, Cochrane Library, Bireme, MedRxiv, and Scopus. The research commenced between July 2020 and March 2021. The terms necessary to identify the studies were "Energy Drink" AND "Exercise" AND "Recovery" AND "Heart Rate Variability". Only clinical, crossover, and placebo-controlled trials were suitable for the final sample. Four studies were considered eligible, studies could not demonstrate significant values akin to the intervention with ED. The total sample size for performing the meta-analysis was 59 participants. The 99% confidence interval (CI) of our meta-analysis ranged from −2.13 to 0.36 with a combined effect size of −0.89 for SDNN , −1.34 to 0.10 with a combined effect size from −0.62 for RMSSD. Our review supports that ED intake did not change the post-exercise HRV recovery in healthy adults. [ABSTRACT FROM AUTHOR]
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- 2023
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5. Effects of the Safe and Sound ProtocolTM (SSP) on Sensory Processing, Digestive Function and Selective Eating in Children and Adults with Autism: A Prospective Single-Arm Study.
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Heilman, Keri J., Heinrich, Sonja, Ackermann, Michel, Nix, Evan, and Kyuchukov, Hristo
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AUTISTIC children , *SENSORIMOTOR integration , *AUTISM in children , *AUTISM spectrum disorders , *CLINICAL trials - Abstract
The purpose of the research was to evaluate the effectiveness of the Safe and Sound ProtocolTM (SSP) on sensory sensitivities, digestive problems, and selective eating in individuals with autism spectrum disorder, hypothesizing a progressive decrease in symptoms at the 1-week and 4-week follow-up assessments that may be moderated by age. The effectiveness of SSP was evaluated in a prospective single-arm study, using validated caregiver reports and self-reports. Thirty-seven participants with ASD (aged 7 to 39 years) took part in the study. Auditory hypersensitivities, auditory hypo-sensitivities to voices, visual sensitivity, and digestive problems all declined at the 1-week and 4-week follow-up assessments. Tactile hypersensitivities and selective eating declined at the 4-week follow-up assessment. At the 4-week follow-up assessment, 70.3% participants showed =30% change in at least one domain (Cohen's d range, week-4: .22 to .50). Age moderated some effects, as adolescents showed a reduction in visual hypersensitivities and non-social tactile sensitivity. Adult participants had a decrease in tactile sensitivities at the 4-week follow-up assessment. Results support use of SSP as a promising intervention to reduce sensory sensitivities, digestive problems, and selective eating in individuals with ASD and highlight the need for controlled clinical trials in natural settings, with considerations for control conditions and testing mechanisms of effects. [ABSTRACT FROM AUTHOR]
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- 2023
6. Effets d'un programme de marche rapide chez le sujet institutionnalisé sur l'activité du système nerveux autonome.
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Jérémy, Raffin, Jean-Claude, Barthélémy, Vincent, Pichot, Philippe, Terrât, Frédéric, Roche, and David, Hupin
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Copyright of SEMS-Journal is the property of Schwiez Zschr Sportmed Sporttraumatologie and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2023
7. Role of the autonomic nervous system and premature atrial contractions in short-term paroxysmal atrial fibrillation forecasting: Insights from machine learning models.
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Grégoire, Jean-Marie, Gilon, Cédric, Carlier, Stéphane, and Bersini, Hugues
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Copyright of Archives of Cardiovascular Diseases is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2022
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8. Adapting psychophysiological data collection for COVID‐19: The "Virtual Assessment" model.
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Tabachnick, Alexandra R., Sellers, Tabitha, Margolis, Emma, Labella, Madelyn, Neff, Dylan, Crowell, Sheila, Raby, K. Lee, Saenz, Celine, Conradt, Elisabeth, and Dozier, Mary
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AUTONOMIC nervous system , *PARENT-child relationships , *COVID-19 , *ACQUISITION of data , *COVID-19 pandemic , *INFANT health - Abstract
The COVID‐19 pandemic has significantly disrupted research activities globally. Researchers need safe and creative procedures to resume data collection, particularly for projects evaluating infant mental health interventions. Remote research is uniquely challenging for psychophysiological data collection, which typically requires close contact between researchers and participants as well as technical equipment frequently located in laboratory settings. In accordance with public health guidance, we adapted procedures and developed novel protocols for a "virtual assessment" in which women and infants provided behavioral and psychophysiological data from their own homes while researchers coordinated remotely. Data collected at virtual visits included video‐recorded parent–child interactions and autonomic nervous system data. Adaptations were designed to optimize safety and data quality while minimizing participant burden. In the current paper, we describe these adaptations and present data evaluating their success across two sites in the United States (University of Delaware and University of Utah), focusing specifically on autonomic nervous system data collected during the well‐validated Still‐Face Paradigm (SFP). We also discuss advantages and challenges of translating traditional lab procedures into the virtual assessment model. Ultimately, we hope that disseminating these procedures will help other researchers resume safe data collection related to infant mental health during the COVID‐19 pandemic and beyond. [ABSTRACT FROM AUTHOR]
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- 2022
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9. A pilot study of the effects of suboccipital fascial release on cortisol levels in workers in the clothing industry -- randomized clinical trial.
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Silva, Bruna Luísa, Alves de Oliveira, Lara, Medeiros Costa, Camila, Queiroz Guimarães, Cristiano, Sette Vieira, Leonardo, and Pereira Pernambuco, Andrei
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SALIVA analysis , *CONFIDENCE intervals , *STATISTICAL correlation , *ENZYME-linked immunosorbent assay , *HYDROCORTISONE , *JOB stress , *QUESTIONNAIRES , *STATISTICAL sampling , *T-test (Statistics) , *TEXTILE industry , *PILOT projects , *RANDOMIZED controlled trials , *TREATMENT effectiveness , *DATA analysis software , *DESCRIPTIVE statistics , *MANN Whitney U Test ,FASCIAE surgery - Abstract
Introduction: Repetitive and time sensitive demands of clothing workers has been associated with higher salivary cortisol levels that may reflect the stress experienced by the worker. Objective: This trial evaluates if suboccipital fascial release (SFR) is associated with reduced salivary cortisol levels. Methods: Randomized controlled trial with 40 workers, divided into: untreated group (UG, n = 15) and treated group (TG, n = 25). Both were removed from the work environment. The TG received the above technique and the UG remained lying at rest, both for five minutes. Salivary cortisol levels were measured by a commercial enzyme-linked immunosorbent assay (ELISA) kit. Statistical analysis of data distribution, intragroup and intergroups, were performed with α adjusted to 0.05. Results: Pre / post intragroup analyses showed significant differences in cortisol levels in both groups, as well as intergroup analyses with lower values in favor of TG (p = 0.014). Conclusion: The reduction in salivary cortisol levels in TG suggests that SFR may be more effective than rest in reducing stress. Future studies with increased experimental rigor are necessary to confirm this conclusion. Clinical trial registration number: REBEC -- RBR -- 56yk9m. [ABSTRACT FROM AUTHOR]
- Published
- 2020
10. The effect of a single spinal manipulation on cardiovascular autonomic activity and the relationship to pressure pain threshold: a randomized, cross-over, sham-controlled trial.
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Picchiottino, Mathieu, Honoré, Margaux, Leboeuf-Yde, Charlotte, Gagey, Olivier, Cottin, François, and Hallman, David M.
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AUTONOMIC nervous system physiology ,BLOOD collection ,CARDIOVASCULAR system physiology ,STATISTICAL correlation ,CROSSOVER trials ,EXERCISE physiology ,HEART beat ,LYING down position ,MATHEMATICAL statistics ,NONPARAMETRIC statistics ,RESEARCH funding ,STATISTICAL sampling ,SPINAL adjustment ,STATISTICS ,SUPINE position ,T-test (Statistics) ,SAMPLE size (Statistics) ,DATA analysis ,PARAMETERS (Statistics) ,RANDOMIZED controlled trials ,TREATMENT effectiveness ,DATA analysis software ,DESCRIPTIVE statistics ,MANN Whitney U Test ,PAIN threshold ,CHIROPRACTIC students - Abstract
Copyright of Chiropractic & Manual Therapies is the property of BioMed Central and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2020
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11. Effects of R-R time series accuracy on heart rate variability indexes.
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Cassirame, Johan, Chevrolat, Simon, and Mourot, Laurent
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HEART beat ,EXERCISE intensity ,MEASUREMENT errors ,STANDARD deviations ,TIME series analysis ,SPORTS sciences - Abstract
Copyright of Movement & Sport Sciences / Science & Motricité is the property of EDP Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2019
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12. Herzfrequenzvariabilität - Stand der Forschung und klinische Anwendbarkeit.
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Fouradoulas, Marc, von Känel, Roland, and Schmid, Jean-Paul
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Heart rate variability is considered a marker of autonomous nervous system activity. Autonomic imbalance is found as a common component in a wide range of pathologies. It has been found to precede the onset of pathologic states and correlates with therapy response. In addition, heart rate variability at rest is a psychophysiological phenomenon with broad significance. Psychological experience affects physiological homeostasis, including immune processes, via the autonomous nerve system, which biologically underpins psychosomatic effects and makes them measurable by heart rate variability. The autonomous nerve system as the interface of this psychophysiological regulation is becoming increasingly important in heart rate variability research and allows a better understanding of the interactions between psyche, lifestyle, autonomous regulation and chronic illness. It requires a systemic, cross-organ view as well as an orientation towards long-term processes. The assessment and normalization of autonomic imbalance thus represents a novel therapeutic strategy from which numerous interventions and lifestyle modifications can be derived. Interventions that strengthen the vagal tone (aerobic or moderate physical training, relaxation techniques, vagus nerve stimulation, etc.) are becoming increasingly important. Despite the simple non-invasive measurement and popularity as a research instrument, interpretation is complex, and clinical implementation has been reluctant so far. Nevertheless, guidelines and data sets of reference values exist for users to apply. [ABSTRACT FROM AUTHOR]
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- 2019
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13. Pulse pressure findings following upper cervical care: a practice-based observational study.
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Kessinger, Robert, Qualls, Trevor, Hart, John, Dallies, Henri, Anderson, Michael, Wayland, Jered, and Bradshaw, Leldon
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BLOOD pressure , *CHIROPRACTIC , *MEDICAL appointments , *SCIENTIFIC observation , *PROBABILITY theory , *SPINAL adjustment , *STATISTICAL hypothesis testing , *T-test (Statistics) , *X-rays - Abstract
Introduction: Pulse pressure is an indicator of cardiovascular health and is the difference between systolic and diastolic blood pressures. An important etiologic consideration is autonomic nervous system balance. The purpose of this study is to observe pulse pressure changes following a six-week course of care utilizing an upper cervical technique. Methods: One hundred and thirty patients presenting in five different clinics were separated into three groups based on initial pulse pressure groups with 40 mmHg considered as normal: low (< 40 mmHg), medium (40-49 mmHg), and high (> 49 mmHg). Results: Pulse pressure reduced by 8.9 mmHg in the high group which was statistically significant (p < 0.01) with a large effects size of 0.8. Changes in the low and Chiromedium groups were not statistically significant (p < 0.05). Conclusion: In this observational study the group displaying the highest pulse pressure demonstrated statistically significant reduction in pulse pressure. [ABSTRACT FROM AUTHOR]
- Published
- 2019
14. Heart rate variability responses to acute and repeated postexercise sauna in trained cyclists.
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Leicht, Anthony S., Halliday, Aaron, Sinclair, Wade H., D'Auria, Shaun, Buchheit, Martin, Kenny, Glen P., and Stanley, Jamie
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SYMPATHETIC nervous system physiology , *PARASYMPATHETIC nervous system physiology , *PHYSIOLOGICAL adaptation , *ATHLETES , *BALNEOLOGY , *CYCLING , *HEART beat , *HEART function tests , *HUMIDITY , *TIME , *COOLDOWN - Abstract
Short- to medium-term (i.e., 4-14 days) heating protocols induce physiological adaptations including improved cardiac autonomic modulations, as assessed using heart rate variability, which may contribute to greater exercise performance. Whether similar cardiac autonomic changes occur during an intense heating protocol (sauna) reported to increase plasma volume in athletes remains to be confirmed. This study examined changes in heart rate and its variability during a single extreme heat (sauna) exposure and repeated exposures in athletes. Six well-trained male cyclists undertook sauna bathing (30 min, 87 °C, 11% relative humidity) immediately after normal training over 10 consecutive days. Heart rate recordings were obtained during each sauna bout. Heart rate and its variability (natural logarithm of root mean square of successive differences, lnRMSSD) were analysed during 10-min periods within the first bout, and changes in heart rate and lnRMSSD were analysed during each bout via magnitude-based inferences. During the first sauna bout, heart rate was almost certainly increased (∼32%, effect size 1.68) and lnRMSSD was almost certainly reduced (∼62%, effect size -5.21) from the first to the last 10-min period, indicating reduced parasympathetic and (or) enhanced sympathetic modulations. Acute exposure to extreme heat stress via sauna produced alterations in heart rate and cardiac autonomic modulations with successive postexercise heat exposures producing unclear changes over a 10-day period. The physiological benefits of intense heating via sauna on cardiac control in athletes remain to be elucidated. [ABSTRACT FROM AUTHOR]
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- 2018
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15. Nonlinear analyses of heart rate variability in hypertension.
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Koichubekov, B.K., Sorokina, M.A., Laryushina, Y.M., Turgunova, L.G., and Korshukov, I.V.
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AUTONOMIC nervous system , *HYPERTENSION , *HEART beat , *REGULATION of blood pressure , *ELECTROCARDIOGRAPHY - Abstract
Objective The autonomic nervous system plays an important role in blood pressure regulation and in the development of hypertension. Heart rate variability (HRV) may be of importance in identifying subjects at higher risk of developing hypertension. In the present study, comparative analysis of HRV for normal and hypertension subjects using nonlinear indices has been carried out. Patients and methods We analyzed the data from 24 patients with essential hypertension aged 45–55 (HG). All the subjects in this group had a confirmed diagnosis of the first- or second-stage essential hypertension. The control group for these subjects included 32 healthy volunteers of the same age group (CG). We analyzed the whole 5 minutes of the ECG recording. Nonlinear indices D 2 , K 2 and lagged Poincaré plot indices were calculated. Results Values of D 2 and K 2 in hypertension state is statistically significantly lower than in healthy. Poincaré plot indices SD1 and SD2 in healthy volunteers are statistically higher than in hypertensive patients for all lags ( P < 0,05). SD1/SD2 ratio is also higher in healthy subjects, but the difference is statistically significant only for l = 5 and 6. Conclusion The heart rhythm in groups with hypertension is more regular, its dynamics are less complex and less “chaotic,” compared to healthy ones. This is expressed in lower values of entropy and correlation dimension. The HR stabilization is observed at both short and long time intervals, but mainly due to the decrease in the difference of the “neighboring” R-R intervals. [ABSTRACT FROM AUTHOR]
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- 2018
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16. Émersion et apprentissage moteur : manifestations neurovégétatives lors de l’adaptation à une perturbation.
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Andrieu, Bernard, Marie, Cécile, Maillot, Pauline, and Hanneton, Sylvain
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MOTOR learning ,PSYCHOLOGY of learning ,GALVANIC skin response ,PHYSICAL education ,SENSORIMOTOR integration - Abstract
Copyright of Movement & Sport Sciences / Science & Motricité is the property of EDP Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2018
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- View/download PDF
17. Fibromialgija: terminološka analiza
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Šemiga, Petra, Pavelin Lešić, Bogdanka, and Petrak, Marta
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terminologie, fibromyalgie, système nerveux autonome, maladie chronique ,fibromialgija ,HUMANISTIC SCIENCES. Philology. Romance Studies ,traduction ,glosar ,maladie chronique ,HUMANISTIČKE ZNANOSTI. Filologija. Romanistika ,terme ,glossaire ,autonomni živčani sustav ,kronična bolest ,termin ,fibromyalgie ,terminologie ,système nerveux autonome ,terminologija ,prijevod - Abstract
Ce mémoire de master présente un travail terminologique qui porte sur la fibromyalgie. Il est divisé en deux parties principales, dont la première est consacrée à l’aspect théorique de la terminologie et où on présente les définitions et les notions clés de la terminologie, ainsi que la méthodologie choisie. La deuxième partie concerne l’aspect pratique, essentiellement la traduction et l’analyse terminologique de deux extraits de textes spécialisés. Elle comporte également un glossaire d’environ 250 termes, 10 fiches terminologiques et une arborescence. Ovaj diplomski rad predstavlja terminološki rad vezan za fibromialgiju. Podijeljen je na dva osnovna dijela, od kojih je prvi posvećen teorijskom aspektu terminologije, gdje se izlažu definicije i ključni terminološki pojmovi, kao i metodološki aparat. Drugi dio rezultat je praktičnog rada na temu fibromialgije, koji se sastoji od prijevoda dvaju stručnih tekstova, glosara od oko 250 termina, 10 terminoloških kartica i terminološkog stabla.
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- 2022
18. A reappraisal of small- and large-fiber damage in carpal tunnel syndrome: New insights into the value of the EMLA test for improving diagnostic sensitivity.
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Triki, Leila, Zouari, Hela G., Kammoun, Rim, Kammoun, Firas, Kammoun, Ines, Masmoudi, Kaouthar, and Lefaucheur, Jean-Pascal
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CARPAL tunnel syndrome , *NEURAL conduction , *WRINKLES (Skin) , *MEDIAN nerve , *BLUE collar workers , *DIAGNOSIS methods - Abstract
Summary Objectives To reappraise the respective involvement of small- and large-fiber damage in carpal tunnel syndrome (CTS) and to determine the diagnostic sensitivity of autonomic tests compared to conventional nerve conduction study (NCS). Methods Thirty-two manual workers complaining of at least unilateral CTS were enrolled. They underwent clinical interview and completed the symptom severity scale of the Boston CTS Questionnaire (sssBCTQ) and the Neuropathic Pain Symptom Inventory (NPSI). In addition, transcarpal NCS was performed to investigate large sensory and motor fibers of the median nerve, while small autonomic fibers were assessed by recording sympathetic skin reflexes (SSR) at the palm and by grading skin wrinkling in response to eutectic mixture of local anesthetic (EMLA) cream application at the pulp of the index finger. For each neurophysiological variable, sensitivity and specificity values for the diagnosis of CTS were calculated and clinical correlations were studied. Results Among 64 hands examined, 36 were clinically symptomatic, while 22 were clinically asymptomatic and served as controls. Among all the neurophysiological variables studied, only the values of transcarpal sensory nerve conduction velocity and the EMLA test grade were found to be more altered in clinically symptomatic hands, with also a trend towards prolonged distal motor latency. Overall, for the diagnosis of clinically symptomatic CTS, NCS, SSR, and the EMLA test had a sensitivity of 66.7%, 22.2%, and 69.4%, respectively, and a specificity of 72.7%, 90.9%, and 50%, respectively. Combining NCS and the EMLA test led to a sensitivity of 88.9% and a specificity of 45.4%. The sssBCTQ ( r = −0.34, P = 0.009) and the total NPSI score ( r = −0.41, P = 0.001) correlated to a more altered EMLA test grade, but not to any NCS or SSR variables. In symptomatic hands, burning sensation was associated with more severe small-fiber lesion, while other pain and sensory symptoms were rather found to be reduced in case of large-fiber damage, evidenced by NCS alteration. Conclusions This study confirms the discrepancy between conventional NCS results and clinical presentation of CTS, but still suggests a major involvement of Aβ fibers in the positive sensory symptoms of CTS, excepting burning sensation. On the other hand, the EMLA test was found to correlate with clinical data and to be able to improve sensitivity of neurophysiological investigation in diagnosing CTS. [ABSTRACT FROM AUTHOR]
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- 2017
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19. Improved cardiovascular autonomic modulation in transgenic rats expressing an Ang-(1-7)-producing fusion protein.
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Dartora, Daniela Ravizzoni, Irigoyen, Maria-Claudia, Casali, Karina Rabello, Moraes-Silva, Ivana C., Bertagnolli, Mariane, Bader, Michael, and Santos, Robson A.S.
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ANGIOTENSINS , *CHIMERIC proteins , *RATS , *NEUROPEPTIDES , *MURIDAE - Abstract
Angiotensin-(1-7) counterbalances angiotensin II cardiovascular effects. However, it has yet to be determined how cardiovascular autonomic modulation may be affected by chronic and acute elevation of Ang-(1-7). Hemodynamics and cardiovascular autonomic profile were evaluated in male Sprague-Dawley (SD) rats and transgenic rats (TGR) overexpressing Ang-(1-7) [TGR(A1-7)3292]. Blood pressure (BP) was directly measured while cardiovascular autonomic modulation was evaluated by spectral analysis. TGR received A-779 or vehicle and SD rats received Ang-(1-7) or vehicle and were monitored for 5 h after i.v. administration. In another set of experiments with TGR, A-779 was infused for 7 days using osmotic mini pumps. Although at baseline no differences were observed, acute administration of A-779 in TGR produced a marked long-lasting increase in BP accompanied by increased BP variability (BPV) and sympathetic modulation to the vessels. Likewise, chronic administration of A-779 with osmotic mini pumps in TGR increased heart rate, sympathovagal balance, BPV, and sympathetic modulation to the vessels. Administration of Ang-(1-7) to SD rats increased heart rate variability values in 88% accompanied by 8% of vagal modulation increase and 18% of mean BP reduction. These results show that both acute and chronic alteration in the Ang-(1-7)-Mas receptor axis may lead to important changes in the autonomic control of circulation, impacting either sympathetic and (or) parasympathetic systems. [ABSTRACT FROM AUTHOR]
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- 2017
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20. Search for MRI biomarkers of stroke risk in migraine with aura
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Gollion, Cédric, Toulouse Neuro Imaging Center (ToNIC), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Toulouse Mind & Brain Institut (TMBI), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Université Paul Sabatier - Toulouse III, Patrice Péran, Vincent Larrue, and STAR, ABES
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White matter abnormalities ,Doppler trans-cranien ,[SDV.MHEP] Life Sciences [q-bio]/Human health and pathology ,Rythme cardiaque ,Insula ,Système nerveux autonome ,Neuroméeanine ,Heart rythm ,Accident vasculaire cérébral ,Autorégulation cérébrale ,[SDV.MHEP.CSC] Life Sciences [q-bio]/Human health and pathology/Cardiology and cardiovascular system ,Stroke ,Cerebral autoregulation ,Diffusion tensor imaging ,[SDV.MHEP.CSC]Life Sciences [q-bio]/Human health and pathology/Cardiology and cardiovascular system ,Locus coeruleus ,Autonomic nervous system ,Anomalies de la substance blanche ,Tenseur de diffusion ,Transcranial ultrasound ,Aura ,Neuromélanine ,Migraine ,[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology - Abstract
Introduction : Migraine with aura (MA) increases the risk of stroke. Possible explanations for this association include an impairment of cerebral autoregulation (CA) and an increased risk of atrial fibrillation. CA is partly controlled by brainstem nuclei such as the locus coeruleus which can be explored by neuromelanin MRI. Atrial fibrillation can be triggered by lesions in the insula, which is activated during migraine attacks. We looked for biomarkers of stroke risk in MA by studying locus coeruleus signaling and CA on the one hand and insula connectivity and heart rhythm regulation on the other. Methods : In a case-control study, we compared 23 migraine with aura patients, aged 30-55 years, with 23 healthy controls. Assessment of CA was based on the calculation of time and frequency correlation indices between cerebral blood velocity measured by transcranial doppler and blood pressure measured by photoplasmography. Heart rate variability was assessed in the frequency domain by spectral analysis. Locus coeruleus signal and volume were measured by neuromelanin MRI and insula connectivity by resting state functional MRI. Results : No differences in CA or heart rate variability were found. However, there was a negative correlation between CA efficiency and duration of migraine (rho = -0.62 ; p = 0.002). The LC did not differ in signal or volume between migraine with aura patients and healthy controls. A weak correlation between CA performance and LC signal was identified (rho = 0.33; p = 0.030). The bilateral dorsal anterior insula was more strongly correlated with the cerebellum (vermis VI) in migraine with aura (right : T = 6.24; p < 0.0001, left : T = 5.02; p < 0.0001). However, this increased connectivity was not correlated with heart rate variability. Discussion : The negative correlation between CA and age of migraine with aura suggested impaired CA at the onset of the disease, which is consistent with an increased risk of stroke at a young age in MA. CA was only weakly correlated with locus coeruleus neuromelanin intensity and no locus coeruleus differences were found in AD, which does not make locus coeruleus a good biomarker. The right and left dorsal anterior insula were more strongly connected to vermis VI in MA. The data in the literature suggest a role for the superior vermis in the control of the cardiovascular autonomic nervous system. Further work could explore the link between this increased connectivity and the risk of atrial fibrillation in MA. Conclusion : LC neuromelanin signaling did not appear to be a biomarker of CA defect in MA. In contrast, the increased connectivity of the bilateral dorsal anterior insula with the vermis VI would justify further research to understand its relationship with the autonomic nervous system control., Introduction : La migraine avec aura (MA) augmente le risque d'accident vasculaire cérébral (AVC). Parmi les hypothèses pouvant expliquer cette association, un défaut d'autorégulation cérébrale (AC) et un risque accru de fibrillation atriale sont évoqués. L'AC est en partie contrôlée par des noyaux du tronc cérébral tel que le locus coeruleus qui peut être exploré par une IRM de neuromélanine. La fibrillation atriale peut être déclenchée par des lésions de l'insula, qui est activée au cours des crises de migraine. Nous avons recherché des biomarqueurs du risque d'AVC dans la MA en étudiant d'une part le signal du locus coeruleus et l'AC et d'autre part la connectivité de l'insula et la régulation du rythme cardiaque. Méthodes : Dans une étude cas-contrôle, nous avons comparé 23 migraineux avec aura, âgés de 30 à 55 ans, à 23 contrôles. L'évaluation de l'AC a reposé sur le calcul d'indices de corrélations temporel et fréquentiel entre la vitesse circulatoire cérébrale mesurée par doppler transcrânien et la pression artérielle mesurée par photo-pléthysmographie. La variabilité de la fréquence cardiaque a été évaluée dans le domaine fréquentiel par une analyse spectrale. Le signal et le volume du locus coeruleus ont été mesurés grâce à une IRM de neuromélanine et la connectivité de l'insula grâce à une IRM fonctionnelle de repos. Résultats : Aucune différence d'AC ni de la variabilité de la fréquence cardiaque n'a été trouvée. Toutefois il existait une corrélation négative entre les performances d'AC et l'ancienneté de la migraine (rho = - 0.62 ; p = 0,002). Le LC ne différait pas en signal ni en volume entre migraineux avec aura et contrôles. Une faible corrélation entre les performances d'AC et le signal de LC a été identifiée (rho = 0,33 ; p = 0,030). L'insula antérieure dorsale et bilatérale était plus fortement corrélée avec le cervelet (vermis VI) dans la migraine avec aura (à droite : T = 6,24 ; p < 0,0001, à gauche : T = 5,02 ; p < 0,0001). Cependant, cette connectivité accrue n'était pas corrélée à la variabilité de la fréquence cardiaque. Discussion : La corrélation négative entre l'AC et l'ancienneté de la migraine avec aura suggérait une altération de l'AC au début de la maladie, ce qui est cohérent avec un risque d'AVC accru à un âge jeune dans la MA. L'AC n'était que faiblement corrélée à l'intensité de neuromélanine du locus coeruleus et aucune différence du locus coeruleus n'était trouvée dans la MA, ce qui ne fait pas du locus coeruleus un bon biomarqueur. L'insula antérieure dorsale droite et gauche étaient plus fortement connectée au vermis VI dans la MA. Les données de la littérature suggèrent un rôle du vermis supérieur dans le contrôle du système nerveux autonome cardiovasculaire. Des travaux ultérieurs pourraient chercher à explorer le lien entre cette connectivité accrue, la dysautonomie et le risque de fibrillation atriale dans la MA. Conclusion : Le signal de neuromélanine du LC ne semblait pas être un biomarqueur du défaut d'AC dans la MA. En revanche, la connectivité accrue de l'insula antérieure dorsale bilatérale avec le vermis VI justifierait des recherches complémentaires pour comprendre son lien avec le contrôle du système nerveux autonome.
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- 2021
21. De l'énaction à l'émersion : la voie du corps vivant. Introduction au dossier
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Hanneton, Sylvain and Andrieu, Bernard
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Emersion ,body ecology ,activation ,phenomenology ,enaction ,conscience ,autonomous nervous system ,embodied cognition ,énaction ,phénoménologie ,écologie corporelle ,Émersion ,système nerveux autonome ,cognition incarnée ,General Medicine - Abstract
From Enaction to Emersion: the Way of Living Body. Body ecology explores the direct relationship of the living body and its nervous system with their environment, especially during immersion in natural, artificial or virtual environments. The activation of the body is the activation of the nervous and sensitive part of the living body under the effect of ecologization. Emersiology proposes to analyze the emersion of the living body in the consciousness of the lived body. Emersion is the involuntary movement in our body of networks, moods and images about which our consciousness knows only the emerged part of. In this issue of Intellectica, we question the modalities of the activation of the living part of our body whose knowledge is not immediately accessible to us. Some authors question here this ecological and unconscious treatment of neurobiological signals (emotions, gestures, movements), so that subjects learn from their living body; while others would like to transform the awareness of experience or cognition by what will have been awakened by the activity of the living (by technologies, emerging logic, attention focusing, neuro-imagery etc.). Indeed, certain activities, often made possible by recent technical developments, are able to participate in the activation of the living body and to produce enabling effects on neural networks. The concepts proposed by emersiology are obviously related to others belonging to different disciplines or theoretical currents such as the neurobiological phenomenology of action, enactivism, embodied cognition, neurosciences and psychology of emotions, of attention and awareness. This issue therefore brings together contributions of a theoretical and/or experimental nature which are concerned with philosophical, psychological and neuro-scientific aspects concerning practices involving the activation of the living body, in particular by the use of hybridization devices or technical remedies., L’écologie corporelle explore la relation directe du corps vivant et de son système nerveux avec son environnement en particulier lors de l’immersion dans des milieux naturels, artificiels ou virtuels. L’activation du corps est la mise en action de la partie nerveuse et sensible du corps vivant sous l’effet de l’écologisation. L’émersiologie propose d’analyser l’émersion du corps vivant dans la conscience du corps vécu. L’émersion est le mouvement involontaire dans notre corps des réseaux, humeurs et images dont notre conscience ne connaît que la partie émergée. Dans ce numéro d’Intellectica, nous interrogeons les modalités de l’activation du vivant de notre corps dont la connaissance ne nous est pas immédiatement accessible. Certains auteurs s’intéressent au traitement écologique et inconscient des signaux neurobiologiques (émotions, gestes, mouvements), pour que les sujets apprennent de leur corps vivant ; tandis que d’autres voudraient transformer la conscience du vécu ou la cognition par ce qui y aura été éveillé par l’activité du vivant (par les technologies, la logique émergente, les focalisations d’attention, la neuro-imagerie etc...). En effet certaines activités, souvent rendues possibles par de récents développement techniques, sont susceptibles de participer à l’activation du corps vivant et de produire des effets capacitants sur les réseaux neuronaux. Les concepts proposés par l’émersiologie sont évidemment en lien avec ceux appartenant à d’autres disciplines ou courants théoriques comme la phénoménologie neurobiologique de l’action, l’énactivisme, la cognition incarnée, les neurosciences et la psychologie des émotions, de l’attention et de la conscience. Ce numéro réunit des contributions de nature théorique et/ou expérimentale s’intéressant aux aspects philosophiques, psychologiques et neuro-scientifiques concernant des pratiques engageant l’activation du corps vivant, notamment par l’utilisation de dispositifs d’hybridation ou de remédiations techniques., Hanneton Sylvain, Andrieu Bernard. De l'énaction à l'émersion : la voie du corps vivant. Introduction au dossier. In: Intellectica. Revue de l'Association pour la Recherche Cognitive, n°71, 2019/2. L’activation du corps vivant. Émersions, Hybridations, Remédiations. pp. 7-20.
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- 2019
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22. Les conséquences des commotions cérébrales sur le contrôle de la fréquence cardiaque par le système nerveux autonome durant une tâche cognitive
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Bellemare-Alford, Daphnée and Ellemberg, Dave
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variabilité de la fréquence cardiaque ,cognition ,fonctions exécutives ,switch task ,mild traumatic brain injury ,autonomic nervous system ,concussion ,heart rate variability ,commotion cérébrale ,tâche d’alternance ,executive functions ,système nerveux autonome ,traumatisme crânien léger - Abstract
La plupart des études portant sur les commotions cérébrales se sont principalement intéressées aux conséquences de ces dernières sur le cerveau lui-même. Or, le cerveau assure de nombreuses fonctions, étant notamment impliqué dans la régulation du rythme cardiaque. Récemment, des chercheurs ont donc étudié les conséquences de ces commotions cérébrales sur la régulation de la fréquence cardiaque par le cerveau durant un effort physique. Cependant, la majorité des athlètes qui subissent une commotion cérébrale doivent non seulement planifier leur retour au jeu, mais également prévoir un retour au travail ou aux études. Ainsi, l’objectif de ce projet de recherche est d’étudier les conséquences des commotions cérébrales sur la régulation de la fréquence cardiaque par le cerveau durant un effort cognitif. Onze athlètes universitaires ayant subi une commotion cérébrale ainsi que 14 athlètes n’ayant aucun historique de commotion cérébrale ont pris part à l’étude. Les athlètes du groupe commotion ont été évalués en moyenne 14,6 jours (± 7,4 jours) après leur blessure. La fréquence cardiaque des participants a été enregistrée au repos ainsi que durant un effort cognitif qui consistait en une tâche d’alternance (« switch task »). De courts segments de la fréquence cardiaque d’une durée de deux minutes, au repos et durant la tâche cognitive, ont été analysés. Les résultats montrent une augmentation significative de l’entropie approximative chez les athlètes du groupe contrôle durant la tâche cognitive (ρ < 0,05), tandis qu’aucune différence n’a été observée entre l’entropie approximative au repos et celle durant la tâche cognitive chez les athlètes du groupe commotion. Ces résultats suggèrent que des déficits neurologiques liés à la régulation de la fréquence cardiaque peuvent être observés durant une tâche cognitive chez des athlètes ayant récemment subi une commotion cérébrale., Most studies have focused on the consequences of concussions on the brain itself. However, the brain performs many functions, including regulating heart rate. Therefore, researchers have begun studying the consequences of these concussions on the brain’s heart rate regulation during physical exertion. Most athletes who sustain a concussion need to plan for their return to play as well as a return to work or school. The purpose of this research project was to study the consequences of concussions on the brain’s regulation of heart rate during cognitive effort. This study involved 11 university athletes who sustained a concussion, as well as 14 athletes with no history of concussion. Concussed athletes were assessed an average of 14.6 days (± 7.4 days) after their injury. The participants’ heart rate was recorded at rest and during cognitive effort, which consisted of a switch task. Short segments lasting two minutes at rest and during cognitive task were analyzed. The results show a significant increase in the approximate entropy in the control group during the cognitive task (ρ
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- 2021
23. Effects of breathing patterns and light exercise on linear and nonlinear heart rate variability.
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Weippert, Matthias, Behrens, Kristin, Rieger, Annika, Kumar, Mohit, and Behrens, Martin
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ANALYSIS of covariance , *BLOOD pressure , *CARBON dioxide , *STATISTICAL correlation , *CYCLING , *EXERCISE , *HEART beat , *PATIENT monitoring , *RESPIRATION , *STATISTICS , *DATA analysis , *OXYGEN consumption , *ERGOMETRY , *DATA analysis software , *DESCRIPTIVE statistics - Abstract
Despite their use in cardiac risk stratification, the physiological meaning of nonlinear heart rate variability (HRV) measures is not well understood. The aim of this study was to elucidate effects of breathing frequency, tidal volume, and light exercise on nonlinear HRV and to determine associations with traditional HRV indices. R-R intervals, blood pressure, minute ventilation, breathing frequency, and respiratory gas concentrations were measured in 24 healthy male volunteers during 7 conditions: voluntary breathing at rest, and metronome guided breathing (0.1, 0.2 and 0.4 Hz) during rest, and cycling, respectively. The effect of physical load was significant for heart rate (HR; p < 0.001) and traditional HRV indices SDNN, RMSSD, lnLFP, and lnHFP ( p < 0.01 for all). It approached significance for sample entropy (SampEn) and correlation dimension (D2) ( p < 0.1 for both), while HRV detrended fluctuation analysis (DFA) measures DFAα1 and DFAα2 were not affected by load condition. Breathing did not affect HR but affected all traditional HRV measures. D2 was not affected by breathing; DFAα1 was moderately affected by breathing; and DFAα2, approximate entropy (ApEn), and SampEn were strongly affected by breathing. DFAα1 was strongly increased, whereas DFAα2, ApEn, and SampEn were decreased by slow breathing. No interaction effect of load and breathing pattern was evident. Correlations to traditional HRV indices were modest ( r from -0.14 to -0.67, p < 0.05 to <0.01). In conclusion, while light exercise does not significantly affect short-time HRV nonlinear indices, respiratory activity has to be considered as a potential contributor at rest and during light dynamic exercise. [ABSTRACT FROM AUTHOR]
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- 2015
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24. Associations between heart rate variability, metabolic syndrome risk factors, and insulin resistance.
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Stuckey, Melanie I., Kiviniemi, Antti, Gill, Dawn P., Shoemaker, J. Kevin, and Petrella, Robert J.
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METABOLIC syndrome risk factors , *AUTONOMIC nervous system , *BLOOD pressure , *BLOOD sugar , *CONFIDENCE intervals , *ELECTROCARDIOGRAPHY , *HEART beat , *HIGH density lipoproteins , *INSULIN resistance , *MEDICAL cooperation , *RESEARCH , *RESEARCH funding , *SEX distribution , *T-test (Statistics) , *TRIGLYCERIDES , *MULTIPLE regression analysis , *DATA analysis software , *WAIST circumference , *DESCRIPTIVE statistics - Abstract
The purpose of this study was to examine differences in heart rate variability (HRV) in metabolic syndrome (MetS) and to determine associations between HRV parameters, MetS risk factors, and insulin resistance (homeostasis model assessment for insulin resistance (HOMA-IR)). Participants ( n = 220; aged 23-70 years) were assessed for MetS risk factors (waist circumference, blood pressure, fasting plasma glucose, triglycerides, and high-density lipoprotein cholesterol) and 5-min supine HRV (time and frequency domain and nonlinear). HRV was compared between those with 3 or more (MetS+) and those with 2 or fewer MetS risk factors (MetS-). Multiple linear regression models were built for each HRV parameter to investigate associations with MetS risk factors and HOMA-IR. Data with normal distribution are presented as means ± SD and those without as median [interquartile range]. In women, standard deviation of R-R intervals 38.0 [27.0] ms, 44.5 [29.3] ms; p = 0.020), low-frequency power (5.73 ± 1.06 ln ms2, 6.13 ± 1.05 ln ms2; p = 0.022), and the standard deviation of the length of the Poincaré plot (46.8 [31.6] ms, 58.4 [29.9] ms; p = 0.014) were lower and heart rate was higher (68 [13] beats/min, 64 [12] beats/min; p = 0. 018) in MetS+ compared with MetS-, with no differences in men. Waist circumference was most commonly associated with HRV, especially frequency domain parameters. HOMA-IR was associated with heart rate. In conclusion, MetS+ women had a less favourable HRV profile than MetS- women, but there were no differences in men. HOMA-IR was associated with heart rate, not HRV. [ABSTRACT FROM AUTHOR]
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- 2015
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25. Contribution à l'étude du contrôle chémoréflexe des variables ventilatoires et cardiovasculaires chez le sujet sain et pathologique
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Van De Borne, Philippe, McEntee, Kathleen, Dewachter, Céline, Ninane, Vincent, Van Der Linden, Philippe, Gurné, Olivier, Senard, Jean-Michel, Janssen, Christophe, Van De Borne, Philippe, McEntee, Kathleen, Dewachter, Céline, Ninane, Vincent, Van Der Linden, Philippe, Gurné, Olivier, Senard, Jean-Michel, and Janssen, Christophe
- Abstract
Le chémoréflexe périphérique est une des boucles réflexe contrôlant le système nerveux autonome et, de ce fait, impliquée dans le contrôle des variables respiratoires et hémodynamiques. Le système nerveux autonome présente deux parties :le système nerveux parasympathique et orthosympathique. L’activation du système nerveux orthosympathique entraine une élévation de la pression artérielle, une accélération du rythme cardiaque ainsi qu’une vasoconstriction des vaisseaux périphériques. Les chémorécepteurs périphériques détectent notamment des changements de la pression partielle en oxygène dans le sang mais sont également sensibles à de nombreuses drogues en raison de leur richesse en récepteurs. Les chémorécepteurs jouent un rôle dans la régulation de la ventilation à l’effort mais leur implication exacte reste obscure à ce jour. C’est pourquoi nous avons étudié l’implication de la boucle chémoréflexe périphérique dans la régulation de la ventilation à l’effort chez le sujet sain, en modulant sa sensibilité par l’administration de dopamine (diminution de la sensibilité des chémorécepteurs) et de digoxine (augmentation de la sensibilité des chémorécepteurs). En outre, une dysfonction du système nerveux orthosympathique et de la boucle chémoréflexe périphérique a été documentée dans de nombreuses affections dont le syndrome d’apnée du sommeil. Les patients apnéiques du sommeil présentent une sensibilité accrue des chémorécepteurs périphériques et un taux plasmatique élevé d’ET. Nous avons tenté d’éclaircir le lien entre les deux. Les principales observations qui ressortent de nos études sont :1. Une réduction ou augmentation de la sensibilité des chémorécepteurs périphériques entraine respectivement une diminution ou une augmentation de la réponse ventilatoire à l’effort sans altérer les capacités aérobies chez le sujet sain. 2. La contribution des chémorécepteurs périphériques dans le contrôle de la réponse ventilatoire à l’effort reste modeste. 3. L’endothéline contri, Doctorat en Sciences médicales (Médecine), info:eu-repo/semantics/nonPublished
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- 2020
26. Recherche de biomarqueurs en IRM du risque d'accident vasculaire cérébral dans la migraine avec aura
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Gollion, Cédric and STAR, ABES
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White matter abnormalities ,Doppler trans-cranien ,[SDV.MHEP] Life Sciences [q-bio]/Human health and pathology ,Rythme cardiaque ,Insula ,Système nerveux autonome ,Neuroméeanine ,Heart rythm ,Accident vasculaire cérébral ,Autorégulation cérébrale ,[SDV.MHEP.CSC] Life Sciences [q-bio]/Human health and pathology/Cardiology and cardiovascular system ,Stroke ,Cerebral autoregulation ,Diffusion tensor imaging ,Locus coeruleus ,Autonomic nervous system ,Anomalies de la substance blanche ,Tenseur de diffusion ,Transcranial ultrasound ,Aura ,Neuromélanine ,Migraine - Abstract
Introduction : Migraine with aura (MA) increases the risk of stroke. Possible explanations for this association include an impairment of cerebral autoregulation (CA) and an increased risk of atrial fibrillation. CA is partly controlled by brainstem nuclei such as the locus coeruleus which can be explored by neuromelanin MRI. Atrial fibrillation can be triggered by lesions in the insula, which is activated during migraine attacks. We looked for biomarkers of stroke risk in MA by studying locus coeruleus signaling and CA on the one hand and insula connectivity and heart rhythm regulation on the other. Methods : In a case-control study, we compared 23 migraine with aura patients, aged 30-55 years, with 23 healthy controls. Assessment of CA was based on the calculation of time and frequency correlation indices between cerebral blood velocity measured by transcranial doppler and blood pressure measured by photoplasmography. Heart rate variability was assessed in the frequency domain by spectral analysis. Locus coeruleus signal and volume were measured by neuromelanin MRI and insula connectivity by resting state functional MRI. Results : No differences in CA or heart rate variability were found. However, there was a negative correlation between CA efficiency and duration of migraine (rho = -0.62 ; p = 0.002). The LC did not differ in signal or volume between migraine with aura patients and healthy controls. A weak correlation between CA performance and LC signal was identified (rho = 0.33; p = 0.030). The bilateral dorsal anterior insula was more strongly correlated with the cerebellum (vermis VI) in migraine with aura (right : T = 6.24; p < 0.0001, left : T = 5.02; p < 0.0001). However, this increased connectivity was not correlated with heart rate variability. Discussion : The negative correlation between CA and age of migraine with aura suggested impaired CA at the onset of the disease, which is consistent with an increased risk of stroke at a young age in MA. CA was only weakly correlated with locus coeruleus neuromelanin intensity and no locus coeruleus differences were found in AD, which does not make locus coeruleus a good biomarker. The right and left dorsal anterior insula were more strongly connected to vermis VI in MA. The data in the literature suggest a role for the superior vermis in the control of the cardiovascular autonomic nervous system. Further work could explore the link between this increased connectivity and the risk of atrial fibrillation in MA. Conclusion : LC neuromelanin signaling did not appear to be a biomarker of CA defect in MA. In contrast, the increased connectivity of the bilateral dorsal anterior insula with the vermis VI would justify further research to understand its relationship with the autonomic nervous system control., Introduction : La migraine avec aura (MA) augmente le risque d'accident vasculaire cérébral (AVC). Parmi les hypothèses pouvant expliquer cette association, un défaut d'autorégulation cérébrale (AC) et un risque accru de fibrillation atriale sont évoqués. L'AC est en partie contrôlée par des noyaux du tronc cérébral tel que le locus coeruleus qui peut être exploré par une IRM de neuromélanine. La fibrillation atriale peut être déclenchée par des lésions de l'insula, qui est activée au cours des crises de migraine. Nous avons recherché des biomarqueurs du risque d'AVC dans la MA en étudiant d'une part le signal du locus coeruleus et l'AC et d'autre part la connectivité de l'insula et la régulation du rythme cardiaque. Méthodes : Dans une étude cas-contrôle, nous avons comparé 23 migraineux avec aura, âgés de 30 à 55 ans, à 23 contrôles. L'évaluation de l'AC a reposé sur le calcul d'indices de corrélations temporel et fréquentiel entre la vitesse circulatoire cérébrale mesurée par doppler transcrânien et la pression artérielle mesurée par photo-pléthysmographie. La variabilité de la fréquence cardiaque a été évaluée dans le domaine fréquentiel par une analyse spectrale. Le signal et le volume du locus coeruleus ont été mesurés grâce à une IRM de neuromélanine et la connectivité de l'insula grâce à une IRM fonctionnelle de repos. Résultats : Aucune différence d'AC ni de la variabilité de la fréquence cardiaque n'a été trouvée. Toutefois il existait une corrélation négative entre les performances d'AC et l'ancienneté de la migraine (rho = - 0.62 ; p = 0,002). Le LC ne différait pas en signal ni en volume entre migraineux avec aura et contrôles. Une faible corrélation entre les performances d'AC et le signal de LC a été identifiée (rho = 0,33 ; p = 0,030). L'insula antérieure dorsale et bilatérale était plus fortement corrélée avec le cervelet (vermis VI) dans la migraine avec aura (à droite : T = 6,24 ; p < 0,0001, à gauche : T = 5,02 ; p < 0,0001). Cependant, cette connectivité accrue n'était pas corrélée à la variabilité de la fréquence cardiaque. Discussion : La corrélation négative entre l'AC et l'ancienneté de la migraine avec aura suggérait une altération de l'AC au début de la maladie, ce qui est cohérent avec un risque d'AVC accru à un âge jeune dans la MA. L'AC n'était que faiblement corrélée à l'intensité de neuromélanine du locus coeruleus et aucune différence du locus coeruleus n'était trouvée dans la MA, ce qui ne fait pas du locus coeruleus un bon biomarqueur. L'insula antérieure dorsale droite et gauche étaient plus fortement connectée au vermis VI dans la MA. Les données de la littérature suggèrent un rôle du vermis supérieur dans le contrôle du système nerveux autonome cardiovasculaire. Des travaux ultérieurs pourraient chercher à explorer le lien entre cette connectivité accrue, la dysautonomie et le risque de fibrillation atriale dans la MA. Conclusion : Le signal de neuromélanine du LC ne semblait pas être un biomarqueur du défaut d'AC dans la MA. En revanche, la connectivité accrue de l'insula antérieure dorsale bilatérale avec le vermis VI justifierait des recherches complémentaires pour comprendre son lien avec le contrôle du système nerveux autonome.
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- 2021
27. Resonanz im und zwischen Menschen – messbarer Schlüsselmechanismus für Heilung und Adhärenz
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Lohninger, Alfred
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- 2018
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28. Effects of menstrual cycle on vagal reactivation in post-exercise recovery among young black African women.
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Balayssac-Siransy, E., Ouattara, S., Adoubi, A., Kouamé, A., Sall, F., and Bogui, P.
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- *
MENSTRUAL cycle , *COOLDOWN , *PHYSIOLOGY of women , *PROGESTERONE , *EXERCISE tests , *MEDICAL protocols ,BLACK Africans - Abstract
Summary Objective To investigate, in young black African women, the influence of estradiol and progesterone on vagal reactivation in post-exercise recovery. Equipment and methods Fourteen young black African women, volunteers (24 ± 1.7 years), with a regular menstrual cycle (28 ± 1 days) were explored during the three phases of menstrual cycle (menstrual 2.9 ± 0.6 days, follicular 13 ± 1.5 days and luteal 23.1 ± 1.4 days). At each phase, a venous sample was taken to determine estradiol and progesterone levels and then an exercise test was made with an active recovery for three minutes and then passive for 3 minutes. Exercise and recovery of our protocol are used in our practice to assess the physical fitness. Results Estradiol is significantly higher during the follicular phase and progesterone is significantly greater in the luteal phase. During the six minutes of recovery, heart rate (HR), heart rate recovery in absolute value (HRR) and as a percentage of peak heart rate at exercise (HRR%), differences between heart rate at the end of active recovery (3 rd minute) and at each minute of passive recovery in absolute value (ΔHR) and as a percentage of heart rate of the third minute (ΔHR%) were not different between the 3 phases of the menstrual cycle. There was no correlation between HRR%, ΔHR% and ovarian hormones. [ABSTRACT FROM AUTHOR]
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- 2014
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29. Effect of muscle metaboreflex activation on central hemodynamics and cardiac function in humans.
- Author
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McNulty, Clare L., Moody, William E., Wagenmakers, Anton J.M., and Fisher, James P.
- Subjects
- *
MUSCLE contraction , *HEART physiology , *ELECTROCARDIOGRAPHY , *EXERCISE tests , *ISOMETRIC exercise , *ANALYSIS of variance , *AUTONOMIC nervous system , *BAROREFLEXES , *CARDIAC output , *COLLEGE students , *ECHOCARDIOGRAPHY , *EXERCISE , *HEMODYNAMICS , *STATISTICS , *T-test (Statistics) , *DATA analysis , *DATA analysis software , *SKELETAL muscle , *DESCRIPTIVE statistics , *STROKE volume (Cardiac output) - Abstract
We sought to determine how the mode of muscle metaboreflex activation influences the central hemodynamic response and cardiac inotropic and lusotropic function in healthy humans. Ten healthy males performed ( i) isometric handgrip (IHG) with and without post-exercise ischemia (PEI) to examine the influence of isolated muscle metaboreflex activation and ( ii) rhythmic handgrip (RHG) with and without ischemia to examine the influence of enhanced muscle metaboreflex activation. Heart rate (HR) and blood pressure (BP) were continuously monitored. Stroke volume (SV, Doppler echocardiography) was measured, cardiac output (CO = HR × SV) and total peripheral resistance (TPR = mean BP/CO) calculated, and indices of left ventricular systolic and diastolic function were obtained (tissue Doppler imaging). During isolated muscle metaboreflex activation with PEI following IHG, mean BP (+23 ± 3 mm Hg) and TPR were elevated from baseline ( p < 0.05), whereas HR, SV, and CO were unchanged. Enhanced muscle metaboreceptor activation during ischemic RHG augmented the increase in mean BP, CO, and HR ( p < 0.05 ischemic vs. free-flow RHG), whereas SV and TPR were unchanged from baseline. Neither isolated (PEI) nor enhanced muscle metaboreflex activation altered left ventricular systolic function (systolic myocardial velocity), but left atrial systolic function (late diastolic myocardial velocity) was enhanced. These findings indicate that the mode of muscle metaboreceptor activation (during vs. post handgrip) determines whether the resultant pressor response is flow (CO) or vasoconstriction (TPR) mediated, and that although left ventricular systolic function is unchanged, enhanced left atrial systolic function likely aids the preservation of SV during muscle metaboreflex engagement. [ABSTRACT FROM AUTHOR]
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- 2014
- Full Text
- View/download PDF
30. Étude de l'altération de la fonction autonomique cardiaque au cours des crises d'épilepsie
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Nouboue, Carole, Université de Picardie Jules Verne (UPJV), and William Szurhaj
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Système nerveux autonome ,Fréquence cardiaque ,Épilepsie -- Complications (médecine) ,Mort subite cardiaque ,[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology - Abstract
De nombreuses manifestations végétatives surviennent au cours des crises d'épilepsie, parmi lesquelles les signes dysautonomiques cardiaques prédominent. Cette atteinte dysautonomique ictale serait un des mécanismes clé des morts subites inattendues chez les patients épileptiques (SUDEP). L'objectif de notre étude était d'étudier les liens entre la dysautonomie cardiaque ictale et la localisation, la latéralisation et la durée des crises au moyen de l'analyse de la variabilité de la fréquence cardiaque. Nous avons réalisé une étude sur une cohorte prospective et multicentrique de juin 2016 à octobre 2019 aux CHU d'Amiens et de Lille portant sur des patients avec épilepsie ayant bénéficié d'un enregistrement vidéo-EEG et ECG de leur crise. Les paramètres temporels et graphiques de la variabilité de la fréquence cardiaque ont été calculés avant, à la fin et à différents temps après la fin de la crise. Nous avons analysé la corrélation statistique entre ces différents paramètres numériques et les caractéristiques des crises des patients. Quatre-vingt-dix-huit crises ont été incluses. Nous avons mis en évidence l'existence d'une tachycardie, une hypertonie sympathique et une chute du tonus parasympathique pendant les différentes crises, ainsi qu'en post-ictal immédiat. Cette altération autonomique cardiaque était plus importante lors des crises temporales que lors des crises frontales et temporo-périsylviennes. Par ailleurs, la tachycardie et la chute prolongée du tonus parasympathique étaient significativement plus importantes pour les crises de durée prolongée (> 2 min). Il n'a pas été mis en évidence de différence significative selon la latéralisation des crises. L'altération de la fonction autonomique cardiaque en période ictale et post-ictale immédiate est plus importante au cours des crises temporales et ce d'autant plus que la durée de la crise est prolongée.
- Published
- 2020
31. Effects of joint manipulative techniques on markers of autonomic nervous system activity
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Picchiottino, Mathieu, Complexité, Innovation, Activités Motrices et Sportives (CIAMS), Université Paris-Sud - Paris 11 (UP11)-Université d'Orléans (UO), Université Paris-Saclay, Olivier Gagey, Charlotte Leboeuf-Yde, and STAR, ABES
- Subjects
Mobilisation ,[SDV.OT]Life Sciences [q-bio]/Other [q-bio.OT] ,[SDV.MHEP] Life Sciences [q-bio]/Human health and pathology ,Seuil de douleur ,[SDV.OT] Life Sciences [q-bio]/Other [q-bio.OT] ,Système nerveux autonome ,Mobilization ,Thérapies manuelles ,Manual therapies ,Pain threshold ,Mécanisme d'action ,Manipulation ,Autonomic nervous system ,Mecanism of action ,[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology - Abstract
The use of joint manipulative techniques in the management of some musculoskeletal disorders is ancient, common and supported by scientific literature. However, the mechanisms of action of these techniques are poorly understood. The potential effect of joint manipulative techniques on autonomic activity is a fundamental component of theories relating to their mechanisms of action. One of these theories proposes that joint manipulative techniques may activate the descending pain inhibitory system projecting from the periaqueductal gray matter, a structure that participates in the coordination of pain modulation and autonomic activity. However, this theory has been little explored in the literature. The first objective of this thesis was to evaluate the specific effects of joint manipulative techniques on markers of autonomic activity by conducting a systematic review of the literature. The second objective was to evaluate (i) the specific effect of a single spinal manipulation (thrust technique) on both cardiovascular autonomic activity and pressure pain threshold, and (ii) the relationship between these two variables. Our evaluation of the literature suggests that oscillatory mobilizations, compared to a sham, probably produce a statistically significant increase in skin sympathetic nerve activity. Spinal manipulation and another type of spinal mobilization technique may have no specific effect on autonomic activity. The results of our experimental trial suggest that the application of a single spinal manipulation has no specific effect on cardiovascular autonomic activity and also not on pressure pain threshold. In addition, we found no relationship between pain modulation and cardiovascular autonomic activity after the intervention. Thus, these experimental results do not support the activation of the descending pain inhibitory system by this type of manipulation. To conclude, we suggest further experimental and clinical research in this area. Several recommendations are made in this regard., L’utilisation des manipulations articulaires dans la prise en charge de certains troubles musculosquelettiques est ancienne, répandue et soutenue par la littérature scientifique. Cependant, les mécanismes d’action des différentes techniques de manipulation sont mal compris. Le potentiel effet des manipulations articulaires sur l’activité autonome est une composante fondamentale de théories relatives à leurs mécanismes d’action. Une de ces théories propose l’activation, par les manipulations articulaires, du système inhibiteur descendant de la douleur via la stimulation de la substance grise périaqueducale, une structure qui participe à la coordination de la modulation de la douleur et de l’activité autonome. Cette théorie a toutefois été peu explorée dans la littérature. Le premier objectif de cette thèse était d’évaluer les effets spécifiques des différentes techniques de manipulation articulaire sur les marqueurs de l’activité autonome en réalisant une revue systématique de la littérature. Le second objectif était d’évaluer (i) l’effet spécifique d’une manipulation vertébrale avec impulsion sur l’activité autonome cardiovasculaire et sur le seuil de douleur à la pression, ainsi que (ii) la relation entre ces deux variables. Notre évaluation de la littérature suggère que certaines techniques de mobilisation articulaire, les mobilisations avec oscillations, produisent probablement, par rapport au placébo, une augmentation statistiquement significative de l’activité sympathique cutanée. Les manipulations vertébrales avec impulsion ainsi qu’une autre technique de mobilisation vertébrale pourraient, quant à elles, ne pas avoir d’effet spécifique sur l’activité autonome. Les résultats de notre essai expérimental suggèrent que l’application d’une manipulation vertébrale avec impulsion n’a pas d’effet spécifique sur l’activité autonome cardiovasculaire ni sur le seuil de douleur à la pression. De plus, nous n’avons pas mis en évidence de relation entre la modulation de la douleur et la modulation de l’activité autonome après l’intervention. Ainsi, ces données expérimentales ne sont pas en faveur de l’activation du système inhibiteur descendant de la douleur par ce type de manipulation. Pour conclure, nous suggérons de nouveaux travaux expérimentaux et cliniques dans ce domaine de recherche. Plusieurs recommandations sont formulées dans ce sens.
- Published
- 2020
32. Adapted physical activity and cardiac coherence in supportive cancer care : their effects on heart rate variability and quality of life in hematologic patients
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Fournié, Claire, Ingénierie, Recherche et Intervention, Sport Santé et Environnement (IRISSE), Université de La Réunion (UR), Université de la Réunion, Georges Dalleau, Chantal Verkindt, and STAR, ABES
- Subjects
Quality of life ,[SDV.MHEP] Life Sciences [q-bio]/Human health and pathology ,Activité physique adaptée ,Supportive cancer care ,[SDV.MHEP.PHY] Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO] ,Non-pharmacological intervention ,Cohérence cardiaque ,Qualité de vie ,Variabilité de la fréquence cardiaque ,Heart Rate Variability ,Système nerveux autonome ,Adapted physical activity ,[SDV.CAN]Life Sciences [q-bio]/Cancer ,Intervention non-médicamenteuse ,[SDV.CAN] Life Sciences [q-bio]/Cancer ,Soins de support ,[SDV.MHEP.PHY]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO] ,Autonomic nervous system ,Hematologic malignancies ,Cardiac coherence ,Hémopathie maligne ,[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology ,Cancer - Abstract
Introduction: Hematologic malignancies require aggressive treatment, including intensivechemotherapy and sometimes hematopoietic stem cell transplantation. The repercussions of cancer and its treatment is recognized for their significant long-term adverse effects on health-related quality of life. As a part of cancer treatment, physical exercise is known to improve mainly physical functioning and fatigue, but there are still questions regarding its impact on psychological and emotional functioning. Nonetheless, heart rate variability biofeedback (HRVB) is recognized for its positive effects on autonomic nervous system balance and emotional self-regulation. Recent research in neurocardiology has shown the benefits of Cardiac Coherence (CC) training on the autonomic balance and the psycho-emotional state. Method: The objectives of the research undertaken in this thesis are to evaluate the effects of a nonpharmacological intervention on quality of life in adult hematologic patients in post-treatment time. The recovery of physiological balance is indexed by the Heart Rate Variability (HRV), which is recognized as a window of the Autonomic Nervous System (ANS). We present four studies: an experimental study in healthy subjects to better understand the mechanisms of HRV during slow and deep breathing; a feasibility study on the implementation of an APA program in hematology; preliminary results of a randomized controlled trial evaluating the effects of a program associating APA and CC on HRV, quality of life, fatigue and anxiety-depression; and a qualitative study evaluating the program’s implementation and the effects of the both interventions. Results: Our results first show the feasibility of APA and CC in these patients. Although the results of the HRV analysis are inconclusive, they tend to confirm that CC intervention results in stimulation of vagal tone. Qualitative evaluation provides us with many important insights into the appropriateness of the interventions to the specific needs of the patients and their effectiveness in optimizing a return to the active daily life. Discussion: This research provides new experimental evidence in understanding the mechanisms of cardiac coherence and its applications in the clinical setting. Further experimentation is still needed to deepen our knowledge in the context of a psychophysiological approach in APA on cancer., Introduction : Les cancers hématologiques sont de survenues brutales et nécessitent des traitements agressifs, notamment de la chimiothérapie intensive et parfois des greffes de cellules souches hématopoïétiques. Les répercussions induites par le cancer et ses traitements sont responsables d’une altération majeure de la qualité de vie, autant qu’une fatigue chronique et des difficultés de réadaptation sociales et professionnelles. Les programmes d’Activité Physique Adaptée (APA) en hématologie ont montré leur efficacité sur l’état physique et la fatigue principalement mais restent peu concluants sur les dimensions psycho-émotionnelles de la qualité de vie. Des recherches récentes en neuro-cardiologie ont par ailleurs montré les bénéfices d’un entraînement à la Cohérence Cardiaque (CC) sur l’équilibre du Système Nerveux Autonome (SNA) et sur l’état psycho-émotionnel. Méthode : Les travaux de recherche entrepris dans cette thèse ont pour objectifs d’évaluer les effets d’une intervention non-médicamenteuse sur la qualité de vie de patients adultes en post-traitement d’une hémopathie maligne. La récupération d’un équilibre physiologique est indexée par la Variabilité de la Fréquence Cardiaque (VFC), reconnue comme une fenêtre d’observation du SNA. Nous présentons quatre études : une étude expérimentale auprès de sujets sains pour mieux comprendre les mécanismes de la VFC lors d’une respiration lente et profonde ; une étude de faisabilité portant sur la mise en œuvre d’un programme APA en hématologie ; puis les résultats préliminaires d’un essai contrôlé randomisé évaluant les effets d’un programme combinant APA et CC sur la VFC, la qualité de vie, la fatigue et l’état anxiodépressif ; et enfin une étude qualitative évaluant le déroulement du programme et les effets des deux interventions. Résultats : Nos résultats montrent d’abord la faisabilité de l’APA et de la CC chez ces patients. Même si les résultats portant sur l’analyse de la VFC sont difficiles à interpréter avec précision, ils tendent à confirmer qu’une intervention en CC entraîne une stimulation du tonus vagal. L’évaluation qualitative nous apporte de nombreux éléments déterminants dans l’adéquation entre les interventions et les besoins singuliers des patients et dans leur efficacité sur l’optimisation d’un retour à une vie active et autonome. Discussion : Ces travaux de recherche apportent par de nouveaux faits expérimentaux, des éléments supplémentaires dans la compréhension des mécanismes de la CC et de ses applications en milieu clinique. D’autres expérimentations sont encore nécessaires pour approfondir nos connaissances dans le cadre d’une approche psychophysiologique en APA et cancer.
- Published
- 2020
33. Activité physique adaptée et cohérence cardiaque en soins de support : leurs effets sur la variabilité de la fréquence cardiaque et la qualité de vie en post-traitement d’une hémopathie maligne
- Author
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Fournié, Claire, Ingénierie, Recherche et Intervention, Sport Santé et Environnement (IRISSE), Université de La Réunion (UR), Université de la Réunion, Georges Dalleau, and Chantal Verkindt
- Subjects
Quality of life ,Activité physique adaptée ,Supportive cancer care ,Non-pharmacological intervention ,Cohérence cardiaque ,Qualité de vie ,Variabilité de la fréquence cardiaque ,Heart Rate Variability ,Système nerveux autonome ,Adapted physical activity ,[SDV.CAN]Life Sciences [q-bio]/Cancer ,Intervention non-médicamenteuse ,Soins de support ,[SDV.MHEP.PHY]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO] ,Autonomic nervous system ,Hematologic malignancies ,Cardiac coherence ,Hémopathie maligne ,[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology ,Cancer - Abstract
Introduction: Hematologic malignancies require aggressive treatment, including intensivechemotherapy and sometimes hematopoietic stem cell transplantation. The repercussions of cancer and its treatment is recognized for their significant long-term adverse effects on health-related quality of life. As a part of cancer treatment, physical exercise is known to improve mainly physical functioning and fatigue, but there are still questions regarding its impact on psychological and emotional functioning. Nonetheless, heart rate variability biofeedback (HRVB) is recognized for its positive effects on autonomic nervous system balance and emotional self-regulation. Recent research in neurocardiology has shown the benefits of Cardiac Coherence (CC) training on the autonomic balance and the psycho-emotional state. Method: The objectives of the research undertaken in this thesis are to evaluate the effects of a nonpharmacological intervention on quality of life in adult hematologic patients in post-treatment time. The recovery of physiological balance is indexed by the Heart Rate Variability (HRV), which is recognized as a window of the Autonomic Nervous System (ANS). We present four studies: an experimental study in healthy subjects to better understand the mechanisms of HRV during slow and deep breathing; a feasibility study on the implementation of an APA program in hematology; preliminary results of a randomized controlled trial evaluating the effects of a program associating APA and CC on HRV, quality of life, fatigue and anxiety-depression; and a qualitative study evaluating the program’s implementation and the effects of the both interventions. Results: Our results first show the feasibility of APA and CC in these patients. Although the results of the HRV analysis are inconclusive, they tend to confirm that CC intervention results in stimulation of vagal tone. Qualitative evaluation provides us with many important insights into the appropriateness of the interventions to the specific needs of the patients and their effectiveness in optimizing a return to the active daily life. Discussion: This research provides new experimental evidence in understanding the mechanisms of cardiac coherence and its applications in the clinical setting. Further experimentation is still needed to deepen our knowledge in the context of a psychophysiological approach in APA on cancer.; Introduction : Les cancers hématologiques sont de survenues brutales et nécessitent des traitements agressifs, notamment de la chimiothérapie intensive et parfois des greffes de cellules souches hématopoïétiques. Les répercussions induites par le cancer et ses traitements sont responsables d’une altération majeure de la qualité de vie, autant qu’une fatigue chronique et des difficultés de réadaptation sociales et professionnelles. Les programmes d’Activité Physique Adaptée (APA) en hématologie ont montré leur efficacité sur l’état physique et la fatigue principalement mais restent peu concluants sur les dimensions psycho-émotionnelles de la qualité de vie. Des recherches récentes en neuro-cardiologie ont par ailleurs montré les bénéfices d’un entraînement à la Cohérence Cardiaque (CC) sur l’équilibre du Système Nerveux Autonome (SNA) et sur l’état psycho-émotionnel. Méthode : Les travaux de recherche entrepris dans cette thèse ont pour objectifs d’évaluer les effets d’une intervention non-médicamenteuse sur la qualité de vie de patients adultes en post-traitement d’une hémopathie maligne. La récupération d’un équilibre physiologique est indexée par la Variabilité de la Fréquence Cardiaque (VFC), reconnue comme une fenêtre d’observation du SNA. Nous présentons quatre études : une étude expérimentale auprès de sujets sains pour mieux comprendre les mécanismes de la VFC lors d’une respiration lente et profonde ; une étude de faisabilité portant sur la mise en œuvre d’un programme APA en hématologie ; puis les résultats préliminaires d’un essai contrôlé randomisé évaluant les effets d’un programme combinant APA et CC sur la VFC, la qualité de vie, la fatigue et l’état anxiodépressif ; et enfin une étude qualitative évaluant le déroulement du programme et les effets des deux interventions. Résultats : Nos résultats montrent d’abord la faisabilité de l’APA et de la CC chez ces patients. Même si les résultats portant sur l’analyse de la VFC sont difficiles à interpréter avec précision, ils tendent à confirmer qu’une intervention en CC entraîne une stimulation du tonus vagal. L’évaluation qualitative nous apporte de nombreux éléments déterminants dans l’adéquation entre les interventions et les besoins singuliers des patients et dans leur efficacité sur l’optimisation d’un retour à une vie active et autonome. Discussion : Ces travaux de recherche apportent par de nouveaux faits expérimentaux, des éléments supplémentaires dans la compréhension des mécanismes de la CC et de ses applications en milieu clinique. D’autres expérimentations sont encore nécessaires pour approfondir nos connaissances dans le cadre d’une approche psychophysiologique en APA et cancer.
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- 2020
34. The effect of a single spinal manipulation on cardiovascular autonomic activity and the relationship to pressure pain threshold:A randomized, cross-over, sham-controlled trial
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Mathieu Picchiottino, David Hallman, Margaux Honoré, Olivier Gagey, Charlotte Leboeuf-Yde, and François Cottin
- Subjects
Male ,lcsh:Diseases of the musculoskeletal system ,seuil de douleur à la pression ,Blood Pressure ,Manipulation vertébrale ,law.invention ,0302 clinical medicine ,Randomized controlled trial ,Heart Rate ,law ,Pain assessment ,Heart rate variability ,Medicine ,Manipulation ,high velocity low amplitude manipulation ,030212 general & internal medicine ,Cross-Over Studies ,High velocity low amplitude manipulation ,Healthy Volunteers ,Anesthesia ,Spinal manipulation ,Female ,Adult ,Manipulation, Spinal ,Pain Threshold ,variabilité de la fréquence cardiaque ,Adolescent ,Physical Therapy, Sports Therapy and Rehabilitation ,Autonomic Nervous System ,Young Adult ,03 medical and health sciences ,Double-Blind Method ,Threshold of pain ,Heart rate ,Pressure ,Humans ,Autonomic nervous system ,système nerveux autonome ,Pressure pain threshold ,business.industry ,Research ,lcsh:Chiropractic ,Blood pressure ,Complementary and alternative medicine ,lcsh:RZ201-275 ,manipulation ,HVLA ,Chiropractics ,lcsh:RC925-935 ,business ,030217 neurology & neurosurgery - Abstract
The autonomic nervous system interacts with the pain system. Knowledge on the effects of high velocity low amplitude spinal manipulations (SM) on autonomic activity and experimentally induced pain is limited. In particular, the effects of SM on autonomic activity and pain beyond the immediate post intervention period as well as the relationship between these two outcomes are understudied. Thus, new research is needed to provide further insight on this issue.The aim was to assess the effect of a single SM (i.e. SM vs. sham) on cardiovascular autonomic activity. Also, we assessed the relationship between cardiovascular autonomic activity and level of pain threshold after the interventions.We conducted a randomized, cross-over, sham-controlled trial on healthy first-year chiropractic students comprising two experimental sessions separated by 48 h. During each session, subjects received, in a random order, either a thoracic SM or a sham manipulation. Cardiovascular autonomic activity was assessed using heart rate and systolic blood pressure variabilities. Pain sensitivity was assessed using pressure pain threshold. Measurements were performed at baseline and repeated three times (every 12 min) during the post intervention period. Participants and outcome assessors were blinded. The effect of the SM was tested with linear mixed models. The relationship between autonomic outcomes and pressure pain threshold was tested with bivariate correlations.Fifty-one participants were included, forty-one were finally analyzed. We found no statistically significant difference between SM and sham in cardiovascular autonomic activity post intervention. Similarly, we found no post-intervention relationship between cardiovascular autonomic activity and pressure pain threshold.Our results suggest that a single SM of the thoracic spine has no specific effect on cardiovascular autonomic activity. Also, we found no relationship between cardiovascular autonomic activity and pressure pain threshold after the SM. Further experimental research should consider the use of several markers of autonomic activity and a more comprehensive pain assessment.N° NCT03273868. Registered September 6, 2017.Le système nerveux autonome interagit avec le système de la douleur. Les connaissances concernant les effets des manipulations vertébrales (MV) de haute vélocité et de faible amplitude sur l’activité autonome et la douleur induite expérimentalement sont limitées. En particulier, les effets des MV sur l’activité autonome et la douleur au-delà de la période située immédiatement après l’intervention sont sous-étudiés, tout comme la relation entre ces deux variables. De nouvelles études sont nécessaires pour mieux comprendre cette problématique.Le premier objectif était d’évaluer l’effet d’une MV (i.e. MV vs placébo) sur l’activité autonome cardiovasculaire. Le second objectif était d’évaluer la relation entre l’activité autonome cardiovasculaire et le seuil de douleur après les interventions.Nous avons réalisé un essai randomisé, croisé, contrôlé par un placébo sur des sujets jeunes et en bonne santé (étudiants en première année de chiropraxie). L’étude comprenait deux sessions expérimentales séparées par 48 h. Les sujets recevaient durant chaque session, soit une MV thoracique, soit une manipulation placébo. L’activité autonome cardiovasculaire était évaluée en utilisant la variabilité de la fréquence cardiaque et la variabilité de la pression artérielle systolique. La sensibilité à la douleur était évaluée en utilisant le seuil de douleur à la pression. Les mesures étaient réalisées avant l’intervention et répétées trois fois après celle-ci (toutes les 12 min). Les participants et les collecteurs de données étaient en aveugle. L’effet de la MV était testé en utilisant des modèles linéaires mixtes. Nous avons testé la relation entre les variables autonomes et le seuil de douleur à la pression en utilisant des corrélations bivariées.Cinquante-et-un sujets ont été inclus et quarante-et-un ont finalement été analysés. Nous n’avons pas trouvé de différence statistiquement significative entre la MV et le placébo en ce qui concerne l’activité autonome cardiovasculaire après l’intervention. Nous n’avons pas trouvé de relation post-intervention entre l’activité autonome cardiovasculaire et le seuil de douleur à la pression.Nos résultats suggèrent qu’une MV thoracique n’a pas d’effet spécifique sur l’activité autonome cardiovasculaire et qu’il n’y a pas de relation entre l’activité autonome et le seuil de douleur à la pression après la MV. On devrait considérer l’utilisation de plusieurs marqueurs de l’activité autonome ainsi qu’une évaluation plus complète de la douleur dans les recherches expérimentales futures.
- Published
- 2020
- Full Text
- View/download PDF
35. Etude du système nerveux autonome du fœtus à l’enfant : modélisation de son fonctionnement chez le fœtus et application chez l’enfant en réanimation pédiatrique
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RECHER, Morgan, STAR, ABES, Evaluation des technologies de santé et des pratiques médicales - ULR 2694 (METRICS), Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Université de Lille, Laurent Storme, Stéphane Leteurtre, and Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Université de Lille
- Subjects
Enfant ,[SDV.MHEP] Life Sciences [q-bio]/Human health and pathology ,Parasympathetic ,Système nerveux autonome ,Sympathique ,Foetus ,Opioid ,Fetus ,Intensive care ,Autonomic nervous system ,Opioïde ,Child ,Sympathetic ,Parasympathique ,[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology ,Heart rate variability ,Variabilité du rythme cardiaque ,Réanimation - Abstract
The autonomic nervous system (ANS) maintains homeostasis through its twoopposing components, the sympathetic system (Σ) and the parasympathetic system(paraΣ). It regulates many of the body's autonomous functions (regulation of heart rate,blood pressure, thermoregulation, digestion, urination, etc.). In particular, the ANScontrols the heart rate and its rapid variations. The analysis of the sinus variability ofthe heart rate is a method to evaluate the variations in the ANS tone. There are manymethods for measuring the heart rate variability (HRV), which have been validated formany years, making it possible to assess the normal or pathological functioning of theANS. Thus, the HRV can be apprehended by temporal methods, spectral methods,geometric methods or non-linear methods for example. The application of thesedifferent approaches has made it possible to design several ANS evaluation devices,particularly for the parasympathetic system, whether for adult patients with theAnalgesia Nociception Index (ANI), which monitors the analgesia/nociception balance,for premature children with the Newborn Infant Parasympathetic Evaluation (NIPE),which monitors well-being, and for the fetus with the Fetal Stress Index (FSI), which is currently being studied by our team. However, there are still limitations limiting the useof these devices with, in particular for the fetus: (1) the lack of consensus on the roleof the Σ and paraΣ components of ANS during maternal labor, (2) difficulties ininterpreting variations in ANS of multifactorial origin; and for children from 1 month to18 years of age: (3) the lack of validation of these analytical methods.The main goal of this study was: for the fetus (1) to assess the involvement ofthe Σ and paraΣ components of the ANS during labor, (2) to assess the fetal ANSresponse during opioid administration to the mother; and for children hospitalized inpediatric intensive care units (3) to validate the NIPE for children under 3 years of ageas a tool for monitoring the analgesia/nociception balance., Le système nerveux autonome (SNA) assure le maintien de l’homéostasie parses deux composantes opposées que sont le système sympathique (Σ) et le systèmeparasympathique (paraΣ). Il régule de nombreuses fonctions autonomes del’organisme (régulation du rythme cardiaque, pression artérielle, thermorégulation,digestion, miction etc.). Ce système contrôle en particulier le rythme cardiaque et ses variations rapides. L’analyse de la variabilité sinusale du rythme cardiaque est une méthode permettant d’évaluer les variations de tonus du SNA. Les méthodes de mesure de la variabilité du rythme cardiaque (Heart Rate Variability, HRV) sont nombreuses et validées depuis de nombreuses années, permettant d’apprécier lefonctionnement normal ou pathologique du SNA. Ainsi, l’HRV peut être appréhendé par des méthodes temporelles, des méthodes spectrales, des méthodes géométriques ou des méthodes non linéaires par exemple. L’application de ces différentes approches a permis de concevoir plusieurs dispositifs d’évaluation du SNA,notamment du système parasympathique, que ce soient pour les patients adultes avec l’Analgesia Nociception Index (ANI), permettant de monitorer la balance analgésie/nociception, pour les enfants prématurés avec le Newborn InfantParasympathetic Evaluation (NIPE) permettant de monitorer le bien être, et pour lefoetus le Fetal Stress Index (FSI) en cours d’étude par notre équipe d’accueil.Cependant, il existe encore des limitations empêchant l’utilisation de ces dispositifsavec, en particulier pour le foetus : (1) l’absence de consensus quant au rôle descomposants Σ et paraΣ du SNA pendant le travail maternel, (2) les difficultésd’interprétation de variations du SNA d’origine multifactorielle ; et pour les enfants de1 mois à 18 ans : (3) l’absence de validation de ces méthodes d’analyse.Le but principal de cette série de travaux était : pour le foetus (1) d’évaluer l’implication des composants Σ et paraΣ du SNA lors du travail, (2) d’évaluer la réponse du SNA du foetus lors de l’administration d’opioïdes à la maman ; et pour les enfants hospitalisés en réanimation pédiatrique (3) de valider le NIPE pour les moins de 3 ans comme outil de monitorage de la balance analgésie/nociception.
- Published
- 2020
36. Investigating the autonomic nervous system and cognitive functions as potential mediators of an association between cardiovascular disease and driving performance.
- Author
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Gaudet, Jeffrey, Bélanger, Mathieu F., Corriveau, Hélène, Mekary, Said, Hay, Dean, and Johnson, Michel J.
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- *
AUTONOMIC nervous system , *COGNITION , *CARDIOVASCULAR diseases , *MYOCARDIAL infarction , *ORGANS (Anatomy) - Abstract
Cardiovascular disease (CVD) impacts the autonomic nervous system and cognitive functions related to activities of daily living, including driving an automobile. Although CVD has been linked to unsafe driving, mechanisms underlying this relationship remain elusive. The aim of this study was to examine the role of cognitive functions and the autonomic nervous system as potential mediators of driving performance. Nineteen individuals having recently suffered a cardiac event and 16 individuals with no history of CVD completed a simulated drive using a STISIM simulator to assess driving performance. Heart rate was recorded throughout testing using a Polar RS800CX heart rate monitor, and measures of executive, orienting, and alerting functions were obtained through the Attention Network Test. We used the Baron and Kenny analysis method to assess potential mediating effects of the relationship between CVD and driving performance. Executive function was the only potential mediator investigated to be associated with driving ( p < 0.01) and CVD ( p < 0.05); however, it did not appear to play a mediating role ( p = 0.28). These results suggest that individuals with CVD exhibit decrements in complex cognitive tasks such as driving and that further research is needed to better understand the mechanisms underlying this relationship. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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37. Incretins: What is known, new and controversial in 2013?
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Burcelin, R. and Thorens, B.
- Subjects
GLUCAGON-like peptide-1 receptor ,ENDOCRINE glands ,NEURAL pathways ,PERIPHERAL nervous system ,NEUROPROTECTIVE agents ,PHARMACOLOGY - Abstract
Copyright of Diabetes & Metabolism is the property of Masson Editeur and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2013
- Full Text
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38. The acute effects of joint manipulative techniques on markers of autonomic nervous system activity: a systematic review and meta-analysis of randomized sham-controlled trials
- Author
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Picchiottino, Mathieu, Leboeuf-Yde, Charlotte, Gagey, Olivier, and Hallman, David M.
- Published
- 2019
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39. Cardiovascular and autonomic effects of water ingestion during postexercise circulatory occlusion.
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ANALYSIS of variance , *ARTERIES , *AUTONOMIC nervous system , *BLOOD circulation , *BLOOD pressure , *CARDIOVASCULAR system , *STATISTICAL correlation , *CROSSOVER trials , *EXERCISE physiology , *REFLEXES , *STATISTICAL sampling , *STATISTICS , *T-test (Statistics) , *WATER , *DATA analysis , *REPEATED measures design , *DATA analysis software , *DESCRIPTIVE statistics - Abstract
As with water ingestion, the activation of the muscle metaboreflex leads to heightened muscle sympathetic nerve activity. Thus, we hypothesized that water ingestion might enhance the pressor effect of the muscle metaboreflex activation. We examined the effect of water ingestion (50 vs. 500 mL) on the cardiovascular and autonomic responses to static handgrip followed by postexercise circulatory occlusion (PECO) in 19 healthy participants (29.2 ± 8.6 years). Beat-to-beat blood pressure, baroreflex sensitivity (BRS), and R-R intervals were recorded in both conditions (pre- and postingestion). Changes in stroke volume and cardiac output were assessed using Modelflow. Cardiac autonomic regulation was investigated by spectral heart rate variability (HRV); baroreflex control of heart rate was assessed by the sequence method. Water ingestion did not increase the pressor effect induced by PECO. Even though 500 mL of water elicited an overall bradycardia, paired by an increase in the high-frequency HRV, there were no differences between conditions for the decrease in BRS or the resetting of the baroreflex to operate at higher blood pressure. Nevertheless, after the ingestion of 500 mL of water, there were no significant correlations between the percent change in cardiac output and that of BRS, from rest to PECO. This contrasts with that seen in the 50 mL condition ( r = -0.68, p < 0.05). Contrasting with our hypothesis, 500 mL of water did not increase the pressor effect induced by PECO. Nevertheless, we found that water ingestion may influence the mechanisms by which the muscle metaboreflex elicits an increased cardiac output during PECO. [ABSTRACT FROM AUTHOR]
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- 2012
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40. Autonomic mediation of the interdependence between variability signals of heart rate and blood pressure in the lizard Gallotia galloti.
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De Vera, Luis, Rial, Rubén V., Pereda, Ernesto, and González, Julián J.
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- *
HEART beat , *BLOOD pressure , *LIZARDS , *BL Lacertae objects , *AUTONOMIC nervous system , *MEDIATION (Statistics) , *PHARMACOLOGY - Abstract
Autonomic nervous system (ANS) involvement in the mediation of the synchronization between beat-to-beat RR interval variability (RRIV) and systolic blood pressure variability (SBPV) signals of the lizard Gallotia galloti (Oudart, 1839) was investigated through linear and nonlinear time series analysis methods in a pharmacological blockade context. The ANS blockers used were atropine, prazosin, and propranolol. The interdependence between the signals was quantified by means of the magnitude-squared coherence (MSC), which measures amplitude and phase linear synchronization; the phase lag index (PLI), which evaluates the phase synchronization; and the index L, which quantifies the generalized linear and nonlinear synchronization. Atropine decreased the PLI in the low-frequency (LF: 0.01-0.05 Hz) range; prazosin decreased the MSC in the medium-frequency (MF: 0.06-0.15 Hz) range; and propranolol did not alter any of the interdependence measures. It is suggested that ( i) the cholinoceptor activity mediates the phase cardiovascular synchronization in the LF range; ( ii) the α1-adrenoceptor activity mediates the amplitude and phase linear cardiovascular synchronization in the MF range; and ( iii) the β-adrenoceptor activity plays no role in mediating any dynamics of cardiovascular synchronization in the studied frequency range. When comparing these results with those in mammals, a lesser overall autonomic involvement in the mediation of the studied cardiovascular interdependences is seen in reptiles. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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41. The association between baroreflex sensitivity and blood pressure in children.
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Fitzgibbon, Laura K., Coverdale, Nicole S., Phillips, Aaron A., Shoemaker, J. Kevin, Klentrou, Panagiota, Wade, Terrance J., Cairney, John, and O'Leary, Deborah D.
- Subjects
- *
AUTONOMIC nervous system physiology , *BAROREFLEXES , *ADOLESCENCE , *AGE distribution , *ANALYSIS of covariance , *ANTHROPOMETRY , *BLOOD pressure , *BLOOD pressure measurement , *CHILD development , *HEART beat , *HYPERTENSION , *RESEARCH funding , *STATISTICAL sampling , *T-test (Statistics) , *DATA analysis software , *DESCRIPTIVE statistics , *CHILDREN , *PHYSIOLOGY - Abstract
Low baroreflex sensitivity (BRS) and heart rate variability (HRV) are associated with the pathogenesis of adult hypertension. However, limited information exists about the negative consequences of elevated childhood blood pressure (BP) and autonomic regulation. Additionally, there are developmental changes in autonomic regulation throughout puberty, yet studies have not appropriately accounted for this. The objective of this study was to investigate BRS and HRV in children with 2 different BP profiles, while controlling for the effects of maturation, age, sex, and body composition. A sample of 11- to 14-year-old participants were divided into 2 BP groups: high BP (HBP; ≥95th percentile; n = 21) and normal BP (NBP; <90th percentile; n = 85). Automated BP was measured at 2 time points. In lab-based testing, 5 min of beat-to-beat BP (Finapres) and R-R interval (RRI) were recorded (standard electrocardiogram) after 15 min of supine rest. Spectral indices were computed using fast Fourier transform, and transfer function analysis was used to compute BRS. High frequency (HF) and low frequency (LF) power spectral areas were set to 0.15-0.4 Hz and 0.04-0.15 Hz, respectively, and BRS was determined for the LF area. After adjustment for age, sex, maturation, and body composition, BRS ( p = 0.04), LF ( p = 0.008), and HF ( p = 0.01) RRI variability, and RRI total power ( p = 0.005) were lower in the HBP than in the NBP participants. As well, the LF/HF systolic BP variability ratio was higher in the HBP than in the NBP group ( p = 0.03). Despite their young age, these children with high, yet not clinically hypertensive BP, display reduced autonomic regulation. [ABSTRACT FROM AUTHOR]
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- 2012
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42. Modulation adrénergique et défaillance cardiaque au cours du sepsis: intérêt des bêtabloquants.
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Aboab, J., Montmollin, E., Mansart, A., and Annane, D.
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HEART failure treatment ,ADRENERGIC beta blockers ,MORTALITY ,TARGETED drug delivery ,IMMUNITY ,INFLAMMATION ,PROTEIN metabolism - Abstract
Copyright of Reanimation is the property of Lavoisier and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2012
- Full Text
- View/download PDF
43. Sympathetic skin response (SSR) in multiple sclerosis and clinically isolated syndrome: A case-control study
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Aghamollaii, V., Harirchian, M.H., Modabbernia, A., Ghaffarpour, M., Mousavi, M., and Tafakhori, A.
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- *
MULTIPLE sclerosis , *SKIN , *SYNDROMES , *CASE-control method , *BRAIN stem , *SOMATOSENSORY evoked potentials - Abstract
Summary: Objective: To compare the sympathetic skin responses (SSRs) in patients with multiple sclerosis (MS), clinically isolated syndrome (CIS), and healthy controls. Methods: SSR was recorded on both hands and feet in 30 patients and 20 healthy controls. SSR results (latency measurements) were compared in patients with normal or abnormal brainstem auditory evoked potentials (BAEPs), visual evoked potentials (VEPs) and somatosensory evoked potentials (SEPs). Results: Twenty-three (76.6%) and sixteen patients (53.3%) with MS had abnormal SSR recordings based on 2-standard deviation (SD) or 3-SD (from the mean of the control group) abnormality criteria, respectively. Sixty-six percent and 40 percent of patients had abnormal (>2SD) SSR in at least one hand and one foot, respectively. Patients with absent SSR had more severe disease and higher Expanded Disability Status Scale (EDSS) scores. Fourteen patients had an EDSS of zero, of whom nine had abnormal SSR and others had at least one abnormal EP study. Patients with abnormal SSR had significantly more abnormal BAEPs and SEPs than patients with normal SSR. SSR latencies were significantly correlated with EDSS and disease duration (P <0.01). All patients had at least one abnormal electrophysiological study. ROC-curve analysis showed that a cut-off score of 7008ms as the sum of all-4-limb SSR latencies had a 80% sensitivity and 95% specificity for differentiating MS patients from healthy controls. Conclusions: This study suggests that SSR is a useful tool for assessment of autonomic function and can be complementary to EDSS and other electrophysiological studies in patients with MS and CIS. [ABSTRACT FROM AUTHOR]
- Published
- 2011
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- View/download PDF
44. Interrelations entre ventilation mécanique et système nerveux autonome.
- Author
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Louw, A., Médigue, C., and Cottin, F.
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ARTIFICIAL respiration ,AUTONOMIC nervous system ,BAROREFLEXES ,HEART beat ,CARDIOVASCULAR diseases ,RESPIRATORY diseases ,PROGNOSIS - Abstract
Copyright of Reanimation is the property of Lavoisier and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2011
- Full Text
- View/download PDF
45. GLP-1: What is known, new and controversial in 2010?
- Author
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Burcelin, R. and Dejager, S.
- Subjects
GLUCAGON-like peptide 1 ,GLUCOSE ,METABOLISM ,ENTERIC nervous system ,ISLANDS of Langerhans ,PANCREATIC beta cells ,METFORMIN - Abstract
Copyright of Diabetes & Metabolism is the property of Masson Editeur and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2010
- Full Text
- View/download PDF
46. A new simple method for assessing sudomotor function: Relevance in type 2 diabetes.
- Author
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Mayaudon, H., Miloche, P.-O., and Bauduceau, B.
- Subjects
TYPE 2 diabetes ,PEOPLE with diabetes ,GALVANIC skin response ,NICKEL electrodes ,AUTONOMIC nervous system ,MEDICAL personnel ,IONTOPHORESIS - Abstract
Copyright of Diabetes & Metabolism is the property of Masson Editeur and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2010
- Full Text
- View/download PDF
47. The isolated sympathetic spinal cord: Cardiovascular and sudomotor assessment in spinal cord injury patients: A literature survey
- Author
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Prévinaire, J.G., Mathias, C.J., El Masri, W., Soler, J.-M., Leclercq, V., and Denys, P.
- Subjects
- *
SPINAL cord injuries , *AUTONOMIC nervous system , *CARDIOVASCULAR system , *PEOPLE with paraplegia , *CLASSIFICATION , *SYMPATHETIC nervous system - Abstract
Abstract: Objectives: To present a comprehensive approach to the assessment of the severity of the autonomic lesion in spinal cord injury (SCI) patients, with regard to the level of lesion. To discuss how to assess an isolated sympathetic spinal cord that has lost supraspinal control (sympathetically complete lesion). Method: PubMed was searched for articles related to cardiovascular (mainly cold pressor test, respiratory and postural challenges) and sudomotor (sympathetic skin responses) tests that have been used. The results of these evaluations are analysed with regard to the site of stimulation (above or below the lesion) according to three types of SCI that offer typical autonomic reactions (tetraplegics, paraplegics at T6 and at T10). Results: Non-invasive cardiovascular and sudomotor testing allows the assessment of the isolated sympathetic spinal cord in SCI patients. Typical responses are found in relation with the level of the sympathetic lesion. Its definition would allow comparison with the somatic motor and sensory level of lesion of SCI patients and provide additional aid to the classification of those patients. Conclusion: For research purposes on the integrity of the spinal sympathetic pathways, a battery of test approach is probably needed, using a combination of stimuli above and below the lesion, evaluating both cardiovascular and sudomotor pathways. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
48. Communication entre cerveau et intestin
- Author
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Bonaz, B.
- Subjects
- *
BRAIN function localization , *VAGUS nerve , *INTESTINAL diseases , *IRRITABLE colon , *NEUROPHYSIOLOGY , *PHARMACOLOGY , *PARASYMPATHETIC nervous system , *CIRCUMVENTRICULAR organs - Abstract
Abstract: Our digestive tract has an autonomous functioning but also has a bidirectional relation with our brain known as brain-gut interactions. This communication is mediated by the autonomous nervous system, i.e., the sympathetic and parasympathetic nervous systems, with a mixed afferent and efferent component, and the circumventricular organs located outside the blood-brain barrier. The vagus nerve, known as the principal component of the parasympathetic nervous system, is a mixed nerve composed of 90 % afferent fibers, which has physiological roles due to its putative vegetative functions. The vagus nerve has also anti-inflammatory properties both through the hypothalamic pituitary adrenal axis (through its afferents) and the cholinergic anti-inflammatory pathway (through its efferents). The sympathetic nervous system has a classical antagonist effect on the parasympathetic nervous system at the origin of an equilibrated sympathovagal balance in normal conditions. The brain is able to integrate inputs coming from the digestive tract inside a central autonomic network organized around the hypothalamus, limbic system and cerebral cortex (insula, prefrontal, cingulate) and in return to modify the autonomic nervous system and the hypothalamic pituitary adrenal axis in the frame of physiological loops. A dysfunction of these brain-gut interactions, favoured by stress, is most likely involved in the pathophysiology of digestive diseases such as irritable bowel syndrome or even inflammatory bowel diseases. A better knowledge of these brain-gut interactions has therapeutic implications in the domain of pharmacology, neurophysiology, behavioural and cognitive management. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
49. Intérêt de l’exploration du système nerveux autonome dans les troubles vésicosphinctériens.
- Author
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Hubeaux, K., Raibaut, P., Breton, F., Jousse, M., Verollet, D., and Amarenco, G.
- Abstract
Copyright of Lettre de Medecine Physique et de Readaptation is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2010
- Full Text
- View/download PDF
50. Validation of spontaneous assessment of baroreceptor reflex sensitivity and its relation to heart rate variability in the ovine fetus pre- and near-term.
- Author
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Frasch, Martin G., Müller, Thomas, Szynkaruk, Mark, and Schwab, Matthias
- Subjects
- *
BARORECEPTORS , *BAROREFLEXES , *SENSITIVITY analysis , *HEART rate monitoring , *FETUS , *STANDARD deviations , *SHEEP - Abstract
Assessment of baroreceptor reflex sensitivity (BRS) in the ovine fetus provides insight into autonomic cardiovascular regulation. Currently, assessment of BRS relies on vasoactive drugs, but this approach is limited by feasibility issues and by the nonphysiologic nature of the stimulus. Thus we aimed to validate the method of spontaneous BRS assessment against the reference method of using vasoactive drugs in preterm (0.76 gestation, n = 16) and near-term (0.86 gestation, n = 16) chronically instrumented ovine fetuses. The BRS measures derived from the spontaneous and reference methods correlated at both gestational ages (R = 0.67 ± 0.03). The sequence method of spontaneous BRS measures also correlated both to the root mean square of standard deviations (RMSSD), which is a measure of fetal heart rate variability reflecting vagal modulation (R = 0.69 ± 0.03), and to fetal body weight (R = 0.65 ± 0.03), which is a surrogate for growth trajectory of each fetus. The methodology presented may aid in developing new models to study BRS and cardiovascular control in ovine fetus in the last trimester of pregnancy. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF
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