49 results on '"Jacek Kolacz"'
Search Results
2. An exploration of psychological trauma and positive adaptation in adults with congenital heart disease during the COVID-19 pandemic
- Author
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Liza Morton, Calum Calderwood, Nicola Cogan, Claire Murphy, Evan Nix, and Jacek Kolacz
- Subjects
Applied Mathematics ,General Mathematics ,BF - Abstract
Introduction: The growing population of adults with congenital heart disease (CHD) often have lifelong experience of dealing with potentially traumatic health crises and medical uncertainty whilst facing increased vulnerability to post-traumatic stress disorder (PTSD). The COVID-19 pandemic presents additional challenges for this population including increased risk of health complications, shielding and strict social distancing, changes to medical care provision and social stigma. Despite such challenges, adults with CHD have the potential to also experience positive changes, yet little is known as to what helps cultivate positive adaptation and post-traumatic growth (PTG) within this context. Methods: The current study comprised a cross-sectional, anonymous, online study exploring psychosocial measures of traumatic experiences as well as protective factors that mitigate the risks to mental health on the mental health for adults with CHD (n=236) during the pandemic. Closed and open-ended questions and a series of standardised psychosocial measures of traumatic experiences, coping mechanisms, emotional regulation and PTG were measured.Results: Findings suggest the CHD population are at increased risk of PSTD which may be exacerbated by the COVID-19 pandemic. However, positive adaptation may promote post traumatic growth. In particular, health adversity is associated with greater appreciation whilst emotional regulation is associated with post-traumatic growth.Conclusions: We recommend a growth-focused, psychologically and trauma-informed approach to medicine and public health, recognising the importance of supporting mental health and promoting living well with CHD during the COVID-19 pandemic and beyond. These findings are likely generalisable to other lifelong health conditions and shielding populations.
- Published
- 2022
3. Cardiac Vagal Regulation Is Impeded in Children With Cyclic Vomiting Syndrome
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Jacek Kolacz, Katja Kovacic, Linh Dang, B U.K. Li, Gregory F. Lewis, and Stephen W. Porges
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Hepatology ,Gastroenterology - Published
- 2023
4. PISTACHIo (PreemptIon of diSrupTive behAvior in CHIldren): real-time monitoring of sleep and behavior of children 3–7 years old receiving parent–child interaction therapy augment with artificial intelligence — the study protocol, pilot study
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Maria Saliba, Noelle Drapeau, Michelle Skime, Xin Hu, Carolyn Jonas Accardi, Arjun P. Athreya, Jacek Kolacz, Julia Shekunov, Dean P. Jones, Paul E. Croarkin, and Magdalena Romanowicz
- Subjects
Medicine (miscellaneous) - Abstract
Background Emotional behavior problems (EBP) are the most common and persistent mental health issues in early childhood. Early intervention programs are crucial in helping children with EBP. Parent–child interaction therapy (PCIT) is an evidence-based therapy designed to address personal difficulties of parent–child dyads as well as reduce externalizing behaviors. In clinical practice, parents consistently struggle to provide accurate characterizations of EBP symptoms (number, timing of tantrums, precipitating events) even from the week before in their young children. The main aim of the study is to evaluate feasibility of the use of smartwatches in children aged 3–7 years with EBP. Methods This randomized double-blind controlled study aims to recruit a total of 100 participants, consisting of 50 children aged 3–7 years with an EBP measure rated above the clinically significant range (T-score ≥ 60) (Eyberg Child Behavior Inventory-ECBI; Eyberg & Pincus, 1999) and their parents who are at least 18 years old. Participants are randomly assigned to the artificial intelligence-PCIT group (AI-PCIT) or the PCIT-sham biometric group. Outcome parameters include weekly ECBI and Pediatric Sleep Questionnaire (PSQ) as well as Child Behavior Checklist (CBCL) obtained weeks 1, 6, and 12 of the study. Two smartphone applications (Garmin connect and mEMA) and a wearable Garmin smartwatch are used collect the data to monitor step count, sleep, heart rate, and activity intensity. In the AI-PCIT group, the mEMA application will allow for the ecological momentary assessment (EMA) and will send behavioral alerts to the parent. Discussion Real-time predictive technologies to engage patients rely on daily commitment on behalf of the participant and recurrent frequent smartphone notifications. Ecological momentary assessment (EMA) provides a way to digitally phenotype in-the-moment behavior and functioning of the parent–child dyad. One of the study’s goals is to determine if AI-PCIT outcomes are superior in comparison with standard PCIT. Overall, we believe that the PISTACHIo study will also be able to determine tolerability of smartwatches in children aged 3–7 with EBP and could participate in a fundamental shift from the traditional way of assessing and treating EBP to a more individualized treatment plan based on real-time information about the child’s behavior. Trial registration The ongoing clinical trial study protocol conforms to the international Consolidated Standards of Reporting Trials (CONSORT) guidelines and is registered in clinicaltrials.gov (ID: NCT05077722), an international clinical trial registry.
- Published
- 2023
5. Use of heart rate variability to predict hospital length of stay for COVID-19 patients: A prospective observational study
- Author
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Ali Foroutan, Gregory F. Lewis, Sujata Punait, Farid Zand, Jacek Kolacz, and Fateme Khodadadi
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education.field_of_study ,medicine.medical_specialty ,business.industry ,Population ,Public Health, Environmental and Occupational Health ,heart rate variability ,Critical Care and Intensive Care Medicine ,cardiac vagal tone ,hospitalization duration ,Confidence interval ,Age ,Emergency medicine ,Emergency Medicine ,medicine ,Arterial blood ,Heart rate variability ,Observational study ,Original Article ,Vagal tone ,education ,business ,Cohort study ,Oxygen saturation (medicine) - Abstract
Background: As the COVID-19 pandemic continues, determining hospital demands has become a vital priority. Heart rate variability (HRV) has been linked to both the presence of viral infection and its severity. We investigate the possibility of using HRV parameters in comparison to other clinical parameters for predicting the hospital length of stay (LOS) for COVID-19 patients. Methods: This was a population-based cohort study. Measurements were performed in a specialized hospital for respiratory disease, dedicated to COVID-19. Patients were polymerase chain reaction positive for COVID-19 and on their 1st day of admission. Heart period, respiratory sinus arrhythmia (RSA), low frequency (LF) HRV, and vagal efficiency were calculated from electrocardiogram signals. This study investigated the correlation of HRV, demographic, and laboratory parameters with hospital LOS. Results: Forty-one participants were recruited, with a significant relationship, observed between hospital LOS and some demographic and clinical parameters such as lymphocyte count, age, and oxygen saturation of arterial blood. There was a negative relationship between LF and hospital LOS (r = −0.53, 95% confidence interval: −0.73, −0.24). Higher vagal efficiency predicted shorter hospital LOS in patients younger than 40 years of age (19.27% shorter hospital LOS was associated with a one SD higher value of VE, P = 0.007). Conclusion: HRV measurement is a non-invasive, inexpensive, and scalable procedure that produces several metrics, some of which are useful for predicting hospital LOS and managing treatment resources during COVID-19 pandemic.
- Published
- 2021
6. Association of childhood maltreatment with adult body awareness and autonomic reactivity: The moderating effect of practicing body psychotherapy
- Author
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Biljana Jokić, Danka Purić, Herbert Grassmann, Christopher G. Walling, Evan J. Nix, Stephen W. Porges, and Jacek Kolacz
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Psychiatry and Mental health ,Clinical Psychology - Abstract
Research shows the disruptive effects of early maltreatment on the autonomic nervous system (ANS) functioning in adulthood. Psychotherapists not only tend to report higher rates of personal experience with early maltreatment, but also fewer mental problems and disturbances in adulthood, as compared to other professions. However, the role of the ANS in these processes has been understudied despite the relevance of the therapist's psychological state and related nonverbal communication for the therapeutic alliance. By comparing body psychotherapists to the general population, the present study aimed to explore the effects of practicing body psychotherapy (BPT) on the link between early maltreatment and autonomic reactivity in adulthood. An online study included 570 body psychotherapists from 35 countries (54% from the United States
- Published
- 2022
7. Speech Behavioral Markers Align on Symptom Factors in Psychological Distress
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Larry Zhang, Jacek Kolacz, Albert Rizzo, Stefan Scherer, and Mohammad Soleymani
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- 2022
8. 'A new measure of feeling safe: Developing psychometric properties of the Neuroception of Psychological Safety Scale (NPSS)': Correction
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Liza Morton, Nicola Cogan, Jacek Kolacz, Calum Calderwood, Marek Nikolic, Thomas Bacon, Emily Pathe, Damien Williams, and Stephen W. Porges
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Clinical Psychology ,Social Psychology - Abstract
Reports an error in "A new measure of feeling safe: Developing psychometric properties of the Neuroception of Psychological Safety Scale (NPSS)" by Liza Morton, Nicola Cogan, Jacek Kolacz, Calum Calderwood, Marek Nikolic, Thomas Bacon, Emily Pathe, Damien Williams and Stephen W. Porges (Psychological safety is increasingly recognized as central to mental health, wellbeing and posttraumatic growth. To date, there is no psychometrically supported measure of psychological safety combining psychological, physiological and social components. The current research aimed to develop and establish the neuroception of psychological safety scale (NPSS), informed by Polyvagal Theory.The study comprised of 3 stages: (a) item generation, (b) item reduction, and (c) assessment of factor structure and internal consistency. Exploratory and confirmatory factor analysis was conducted from 2 samples who completed a survey online (exploratoryInitially, 107 items were generated. Item reduction and exploratory factor analysis resulted in a 29-item NPSS with subscales of compassion, social engagement and body sensations. The NPSS was found to have a consistent factor structure and internal consistency.The NPSS is a novel measure of psychological safety which can be used across a range of health and social care settings. This research provides a platform for further work to support and enhance understandings of the science of safety through the measurement of psychological, relational and physiological components of safety. The NPSS will help shape new approaches to evaluating trauma treatments, relational issues and mental health concerns. Research to establish the convergent, discriminant and concurrent validity of the NPSS and to explore its use with diverse community and clinical populations is underway. (PsycInfo Database Record (c) 2022 APA, all rights reserved).
- Published
- 2022
9. ENACT study : what has helped health and social care workers maintain their mental wellbeing during the COVID-19 pandemic?
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Nicola Cogan, Chloe Kennedy, Zoe Beck, Lisa McInnes, Gillian MacIntyre, Liza Morton, Gary Tanner, and Jacek Kolacz
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Sociology and Political Science ,Health Policy ,Health Personnel ,Public Health, Environmental and Occupational Health ,COVID-19 ,Social Support ,Mental Health ,Cross-Sectional Studies ,RA0421 ,Communicable Disease Control ,Humans ,Pandemics ,Social Sciences (miscellaneous) - Abstract
A growing body of research has highlighted the adverse impact of COVID-19 stressors on health and social care workers' (HSCWs) mental health. Complementing this work, we report on the psychosocial factors that have had both a positive and negative impact on the mental well-being of HSCWs during the third lockdown period in Scotland. Using a cross-sectional design, participants (n = 1364) completed an online survey providing quantitative data and free open-text responses. A multi-method approach to analysis was used. The majority of HSCWs were found to have low well-being scores, high levels of COVID-19 stress, worry, burnout and risk perception scores and almost half of HSCWs met the clinical cut-off for acute stress (indicative of PTSD). HSCWs with higher scores on adaptive coping strategies and team resilience reported higher scores on mental well-being. HSCWs were significantly more likely to seek informal support for dealing with personal or emotional problems compared to formal supports. Barriers to formal help-seeking were identified including stigma and fear of the consequences of disclosure. HSCWs mostly valued peer support, workplace supports, visible leadership and teamwork in maintaining their mental well-being. Our findings illuminate the complexity of the effects of the COVID-19 pandemic on HSCWs' well-being and will inform future intervention development seeking to increase positive adaptation and improve staff well-being. Addressing barriers to mental health help-seeking among HSCWs is essential. The implications emphasise the importance of lessons learned across health and social care contexts, planning and preparedness for future pandemics.
- Published
- 2022
10. EVALUATION OF ORE SORTING FOR THE IRON ORE INDUSTRY
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Neymayer Pereira Lima, Jonathan Melo, and Jacek Kolacz
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- 2022
11. Measuring Autonomic Symptoms with the Body Perception Questionnaire Short Form (BPQ-SF): Factor Analysis, Derivation of U.S. Adult Normative Values, and Association with Sensor-Based Physiological Measures
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Jacek Kolacz, Xiwei Chen, Evan J. Nix, Olivia K. Roath, Logan G. Holmes, Clarissa Tokash, Stephen W. Porges, and Gregory F. Lewis
- Abstract
ObjectiveAutonomic regulation of organ and tissues may give rise to disruptions of typical functions. The Body Perception Questionnaire Short Form (BPQ-SF) includes items that were developed to assess autonomic symptoms in daily life. This pair of studies aimed to establish previously unexplored psychometric properties of the BPQ-SF, develop normative values for clinical and research use, and validate the self-reports with sensor-based measures.MethodsStudy 1 reports exploratory and confirmatory factor analysis (CFA) on BPQ-SF autonomic reactivity items from a large U.S. population-based online study (n = 2048). In study 2, BPQ-SF scores were examined for associations with heart period, respiratory sinus arrhythmia (RSA), and skin conductance (SC) during seated leg lifts in a community sample (n = 62).ResultsStudy 1 results supported a 2-factor supra- and sub-diaphragmatic autonomic symptom solution (CFA: RMSEA = .040, CFI = .99, TLI = .99), though a 1-factor solution also fit the data well (RMSEA = .080, CFI = .99, TLI = .99). In study 2, flexible HP responses to lifts and rests were demonstrated at all autonomic symptom levels. However, low self-reported autonomic symptoms were associated with flexible dynamic RSA and SC, moderate symptoms with prolonged SC responses during rest periods, and high symptoms with little systematic changes in RSA and SC during leg lifts.ConclusionResults support the validity of self-reports of autonomic symptoms in research and clinical applications, with higher symptoms likely indicating impairment in autonomic flexibility.
- Published
- 2022
12. The neurophysiological embedding of child maltreatment
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Jacek Kolacz, J. Bart Klika, Steven J. Holochwost, W. Roger Mills-Koonce, Guan Wang, and Sara R. Jaffee
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Hypothalamo-Hypophyseal System ,Sympathetic nervous system ,Sympathetic Nervous System ,Metabolic function ,Hydrocortisone ,Injury control ,Pituitary-Adrenal System ,Human factors and ergonomics ,Poison control ,Neurophysiology ,Developmental psychology ,Psychiatry and Mental health ,Autonomic nervous system ,medicine.anatomical_structure ,Injury prevention ,Developmental and Educational Psychology ,medicine ,Humans ,Child Abuse ,Child ,Psychology ,Stress, Psychological - Abstract
Maltreatment adversely impacts the development of children across a host of domains. One way in which maltreatment may exert its deleterious effects is by becoming embedded in the activity of neurophysiological systems that regulate metabolic function. This paper reviews the literature regarding the association between childhood maltreatment and the activity of three systems: the parasympathetic nervous system, the sympathetic nervous system, and the hypothalamic–pituitary–adrenal axis. A particular emphasis is placed on the extent to which the literature supports a common account of activity across these systems under conditions of homeostasis and stress. The paper concludes with an outline of directions for future research and the implications of the literature for policy and practice.
- Published
- 2020
13. ENACT Study: What has helped health and social care workers maintain their mental wellbeing during the COVID-19 pandemic? Adaptive coping, team resilience, help-seeking behaviour and work based supports
- Author
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Nicola Cogan, Chloe Kennedy, Zoe Beck, Lisa McInnes, null Gillian, Liza Morton, Gary Tanner, and Jacek Kolacz
- Abstract
Rapid studies have highlighted the adverse mental health impact of COVID-19 on health and social care workers (HSCWs). Complementing this work, we report on the psychosocial factors that have helped HSCWs adapt to the adversities associated with COVID-19 and protect staff wellbeing in Scotland. The ENACT study collected data from HSCWs (n= 1364) in Scotland during the third national lockdown. Using a cross-sectional design, participants completed an online survey providing quantitative data and free responses. A multi-method approach to analysis was used. The majority of HSCWs were found to have low wellbeing scores, high levels of COVID-19 stress, worry, burnout and risk perception scores and almost half of HSCWs met the clinical cut off for acute stress. Adaptive coping strategies and increased perceived team resilience helped mitigate against the adverse impact that COVID-19 stressors have on HSCWs’ mental wellbeing. HSCWs were significantly more likely to seek informal support for dealing with personal or emotional problems. Barriers to formal help-seeking were identified including stigma and fears of consequence of disclosure. HSCWs most valued peer support, workplace supports, visible leadership and teamwork. Our findings illuminate the complexity of the effects of the COVID-19 pandemic on HSCWs’ wellbeing and will inform future intervention development to increase positive adaptation amongst staff. Addressing barriers to mental health help-seeking among HSCWs is essential. The implications emphasise the importance of lessons learned across health and social care contexts, planning and preparedness for future pandemics.
- Published
- 2022
14. Early Life Maternal Separation and Maternal Behaviour Modulate Acoustic Characteristics of Rat Pup Ultrasonic Vocalizations
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Robert J. Ludwig, Jasmine H. Kaidbey, Manon Ranger, Michael M. Myers, Jacek Kolacz, Joseph L. Barone, Alexandra M. Schulz, Martha G. Welch, and Muhammad Anwar
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Physiology ,lcsh:Medicine ,Article ,Maternal behaviour ,Fight-or-flight response ,Rats, Sprague-Dawley ,03 medical and health sciences ,0302 clinical medicine ,Medicine ,Animals ,0501 psychology and cognitive sciences ,Ultrasonics ,050102 behavioral science & comparative psychology ,Maternal Behavior ,lcsh:Science ,Emotion ,Multidisciplinary ,business.industry ,Maternal Deprivation ,05 social sciences ,lcsh:R ,Acoustics ,Early life ,Phenotype ,Animals, Newborn ,Social behaviour ,Female ,lcsh:Q ,Vocalization, Animal ,business ,030217 neurology & neurosurgery - Abstract
Early separation of preterm infants from their mothers has adverse, long-term neurodevelopmental consequences. We investigated the effects of daily maternal separation (MS) of rat pups from postnatal days 2–10 (PND2–10) on neurobehavioural responses to brief isolation at PND12 compared with pups receiving controlled handling without MS. Ultrasonic vocalizations (USV) were measured at PND12 during two, 3-minute isolations occurring immediately before and after a 3-minute maternal reunion. There were no significant differences in acoustic characteristics between MS and control animals in the first isolation. However, in the second isolation, MS pups produced a greater proportion of high (~60 kHz) vs low (~40 kHz) frequency calls. During this isolation, control pups made longer and louder low frequency calls compared to the first isolation, whereas MS pups did the opposite. Maternal behaviour of control and MS mothers modulated pup acoustic characteristics in opposite directions; higher maternal care was associated with more low frequency calls in control pups but more high frequency calls in MS pups. We hypothesize that MS results in USV emission patterns reflective of a greater stress response to isolation. This translational model can be used to identify mechanisms and interventions that may be exploited to overcome the negative, long-term effects of MS.
- Published
- 2019
15. A new measure of feeling safe: Developing psychometric properties of the neuroception of psychological safety scale (NPSS)
- Author
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Liza Morton, Nicola Cogan, Jacek Kolacz, Calum Calderwood, Marek Nikolic, Thomas Bacon, Emily Pathe, Damien Williams, and Stephen W. Porges
- Subjects
Clinical Psychology ,Social Psychology ,BF - Abstract
Objective: Psychological safety is increasingly recognised as central to mental health, wellbeing and post-traumatic growth. To date, there is no psychometrically supported measure of psychological safety combining psychological, physiological and social components. The current research aimed to develop and establish the neuroception of psychological safety scale (NPSS), informed by Polyvagal Theory. Method: The study comprised of three stages: (1) item generation, (2) item reduction, and (3) assessment of factor structure and internal consistency. Exploratory and confirmatory factor analysis was conducted from two samples who completed a survey online (exploratory n = 342, confirmatory n = 455). Results: Initially, 107 items were generated. Item reduction and exploratory factor analysis resulted in a 29-item NPSS with subscales of compassion, social engagement and body sensations. The NPSS was found to have a consistent factor structure and internal consistency. Conclusion: The NPSS is a novel measure of psychological safety which can be used across a range of health and social care settings. This research provides a platform for further work to support and enhance understandings of the science of safety through the measurement of psychological, relational and physiological components of safety. The NPSS will help shape new approaches to evaluating trauma treatments, relational issues and mental health concerns. Research to establish the convergent, discriminant and concurrent validity of the NPSS and to explore its use with diverse community and clinical populations is underway.
- Published
- 2021
16. Associations between acoustic features of maternal speech and infants' emotion regulation following a social stressor
- Author
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Stephen W. Porges, Bennett I. Bertenthal, Jacek Kolacz, Elizabeth B. daSilva, and Gregory F. Lewis
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Facial expression ,medicine.medical_specialty ,Stressor ,Infant ,Acoustics ,Audiology ,Mother-Child Relations ,Emotional Regulation ,Facial Expression ,Distress ,Pediatrics, Perinatology and Child Health ,Heart rate ,Developmental and Educational Psychology ,medicine ,Humans ,Speech ,Spectral analysis ,Female ,Cardiac vagal tone ,Vagal tone ,Prosody ,Psychology - Abstract
Caregiver voices may provide cues to mobilize or calm infants. This study examined whether maternal prosody predicted changes in infants' biobehavioral state after the still face, a stressor in which the mother withdraws and reinstates social engagement. Ninety-four dyads participated in the study (infant age 4-8 months). Infants' heart rate and respiratory sinus arrhythmia (measuring cardiac vagal tone) were derived from an electrocardiogram (ECG). Infants' behavioral distress was measured by negative vocalizations, facial expressions, and gaze aversion. Mothers' vocalizations were measured via a composite of spectral analysis and spectro-temporal modulation using a two-dimensional fast Fourier transformation of the audio spectrogram. High values on the maternal prosody composite were associated with decreases in infants' heart rate (β = -.26, 95% CI: [-0.46, -0.05]) and behavioral distress (β = -.23, 95% CI: [-0.42, -0.03]), and increases in cardiac vagal tone in infants whose vagal tone was low during the stressor (1 SD below mean β = .39, 95% CI: [0.06, 0.73]). High infant heart rate predicted increases in the maternal prosody composite (β = .18, 95% CI: [0.03, 0.33]). These results suggest specific vocal acoustic features of speech that are relevant for regulating infants' biobehavioral state and demonstrate mother-infant bi-directional dynamics.
- Published
- 2021
17. Associations between Acoustic Features of Maternal Speech and Infants’ Emotion Regulation following a Social Stressor
- Author
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Elizabeth B. daSilva, Stephen W. Porges, Bennett I. Bertenthal, Jacek Kolacz, and Gregory F. Lewis
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Distress ,medicine.medical_specialty ,Facial expression ,business.industry ,Heart rate ,Stressor ,Medicine ,Spectral analysis ,Cardiac vagal tone ,Audiology ,Vagal tone ,business ,Prosody - Abstract
Caregiver voices may provide cues to mobilize or calm infants. This study examined whether maternal prosody predicted changes in infants’ biobehavioral state during the Still Face, a stressor in which the mother withdraws and reinstates social engagement. Ninety-four dyads participated in the study (infant age 4-8 months). Infants’ heart rate and respiratory sinus arrhythmia (measuring cardiac vagal tone) were derived from an electrocardiogram (ECG). Infants’ behavioral distress was measured by negative vocalizations, facial expressions, and gaze aversion. Mothers’ vocalizations were measured with spectral analysis and spectro-temporal modulation using a two-dimensional fast Fourier transformation of the audio spectrogram. High values on the maternal prosody composite were associated with decreases in infants’ heart rate (β=-.26, 95% CI: [-.46, -.05]) and behavioral distress (β=-.20, 95% CI: [-.38, -.02]), and increases in cardiac vagal tone in infants whose vagal tone was low during the stressor (1 SD below mean β=.39, 95% CI: [.06, .73]). High infant heart rate predicted increases in the maternal prosody composite (β=.18, 95% CI: [.03, .33]). These results suggest specific vocal acoustic features of speech that are relevant for regulating infants’ biobehavioral state and demonstrate mother-infant bi-directional dynamics.
- Published
- 2021
18. Cardiac autonomic regulation and joint hypermobility in adolescents with functional abdominal pain disorders
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Manu R Sood, Stephen W. Porges, Olivia R Roath, Jacek Kolacz, Qasim Aziz, Gregory F. Lewis, and Katja Kovacic
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Joint Instability ,Male ,Joint hypermobility ,medicine.medical_specialty ,Abdominal pain ,Supine position ,Adolescent ,Gastrointestinal Diseases ,Physiology ,Psychological intervention ,Autonomic Nervous System ,Sitting ,Electrocardiography ,03 medical and health sciences ,0302 clinical medicine ,Heart Rate ,Internal medicine ,Humans ,Medicine ,Prospective Studies ,Vagal tone ,Child ,Endocrine and Autonomic Systems ,business.industry ,Gastroenterology ,Heart ,medicine.disease ,Abdominal Pain ,Respiratory Sinus Arrhythmia ,Autonomic nervous system ,Polyvagal Theory ,Cardiology ,Female ,030211 gastroenterology & hepatology ,medicine.symptom ,business ,030217 neurology & neurosurgery - Abstract
Background Joint hypermobility (JH) is associated with autonomic nervous system dysregulation and functional abdominal pain disorders (FAPDs). Understanding the neurophysiological processes linking these conditions can inform clinical interventions. Autonomic activity regulates gastrointestinal (GI) sensorimotor function and may be a key mechanism. The aims of this study were to examine the relation of JH with dynamic autonomic activity and parasympathetic regulation in adolescents with FAPDs and identify optimal JH cutoff scores that best index autonomic regulation in FAPDs. Methods A total of 92 adolescents with FAPDs and 27 healthy controls (age 8-18 years; 80% female) were prospectively enrolled. JH was assessed by Beighton scores. ECG recordings were conducted during supine, sitting, and standing posture challenges. ECG-derived variables-heart period (HP), respiratory sinus arrhythmia (RSA), and vagal efficiency (VE)-were analyzed using linear regression and mixed effects modeling. Key results Beighton scores of ≥4 optimally distinguished autonomic function. Adolescents with FAPD and JH had reduced VE compared to adolescents with FAPDs without JH (B = 18.88, SE = 6.25, p = 0.003) and healthy controls (B = 17.56, SE = 8.63, p = 0.044). These subjects also had lower and less dynamic RSA and HP values during posture shifts, with strongest differences in supine position and using the VE metric. Conclusions & inferences Suboptimal autonomic regulation indexed by reduced vagal efficiency may be a mechanism of symptoms in hypermobile FAPD patients with Beighton score ≥ 4. Autonomic disturbance may serve as potential intervention target for patients with JH and functional GI disorders.
- Published
- 2021
19. Item Reduction, Psychometric and Biometric Properties of the Italian Version of the Body Perception Questionnaire-Short Form (BPQ-SF): The BPQ-22
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Graziella Orrù, Carlo Chiorri, Andrea Poli, Stephen W. Porges, Gian-Paolo Mazzoni, Jacek Kolacz, Angelo Gemignani, Ciro Conversano, Mario Miccoli, and Angelo Giovanni Icro Maremmani
- Subjects
050103 clinical psychology ,Psychometrics ,Health, Toxicology and Mutagenesis ,body perception ,lcsh:Medicine ,Body awareness ,interoception ,Article ,03 medical and health sciences ,body ,polyvagal theory ,psychological trauma ,vagus nerve ,0302 clinical medicine ,Surveys and Questionnaires ,medicine ,Humans ,0501 psychology and cognitive sciences ,Reactivity (psychology) ,Reliability (statistics) ,05 social sciences ,lcsh:R ,Public Health, Environmental and Occupational Health ,Discriminant validity ,Reproducibility of Results ,medicine.disease ,Italy ,Polyvagal Theory ,Interoception ,Anxiety ,Perception ,medicine.symptom ,Psychology ,030217 neurology & neurosurgery ,Clinical psychology ,Psychological trauma - Abstract
Body awareness disorders and reactivity are mentioned across a range of clinical problems. Constitutional differences in the control of the bodily state are thought to generate a vulnerability to psychological symptoms. Autonomic nervous system dysfunctions have been associated with anxiety, depression, and post-traumatic stress. Though interoception may be a transdiagnostic mechanism promoting the improvement of clinical symptomatology, few psychometrically sound, symptom-independent, self-report measures, informed by brain–body circuits, are available for research and clinical use. We validated the Italian version of the body perception questionnaire (BPQ)—short form and found that response categories could be collapsed from five to three and that the questionnaire retained a three-factor structure with items reduced from 46 to 22 (BPQ-22). The first factor was loaded by body awareness items, the second factor comprised some items from the body awareness scale and some from the subdiaphragmatic reactivity scale (but all related to bloating and digestive issues), and the third factor by supradiaphragmatic reactivity items. The BPQ-22 had sound psychometric properties, good convergent and discriminant validity and test–retest reliability and could be used in clinical and research settings in which the body perception assessment is of interest. Psychometric findings in light of the polyvagal theory are discussed.
- Published
- 2021
20. Review for 'Physiological measurement of emotion from infancy to preschool: A systematic review and meta‐analysis'
- Author
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Jacek Kolacz
- Subjects
Meta-analysis ,Psychology ,Developmental psychology - Published
- 2020
21. Adversity History Predicts Self-Reported Autonomic Reactivity and Mental Health in US Residents During the COVID-19 Pandemic
- Author
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Jacek Kolacz, Lourdes P. Dale, Evan J. Nix, Olivia K. Roath, Gregory F. Lewis, and Stephen W. Porges
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lcsh:RC435-571 ,media_common.quotation_subject ,coronavirus ,Structural equation modeling ,03 medical and health sciences ,0302 clinical medicine ,lcsh:Psychiatry ,Pandemic ,medicine ,worry ,Social isolation ,polyvagal theory ,media_common ,Original Research ,Psychiatry ,autonomic nervous system ,COVID-19 ,PTSD ,Mental health ,030227 psychiatry ,Autonomic nervous system ,Psychiatry and Mental health ,trauma ,Polyvagal Theory ,depression ,Survey data collection ,Worry ,medicine.symptom ,Psychology ,030217 neurology & neurosurgery ,Clinical psychology - Abstract
Background: The spread of the COVID-19 virus presents an unprecedented event that rapidly introduced widespread life threat, economic destabilization, and social isolation. The human nervous system is tuned to detect safety and danger, integrating body and brain responses via the autonomic nervous system. Shifts in brain-body states toward danger responses can compromise mental health. For those who have experienced prior potentially traumatic events, the autonomic threat response system may be sensitive to new dangers and these threat responses may mediate the association between prior adversity and current mental health. Method: The present study collected survey data from adult U.S. residents (n = 1,666; 68% female; Age M = 46.24, SD = 15.14) recruited through websites, mailing lists, social media, and demographically-targeted sampling collected between March and May 2020. Participants reported on their adversity history, subjective experiences of autonomic reactivity, PTSD and depression symptoms, and intensity of worry related to the COVID-19 pandemic using a combination of standardized questionnaires and questions developed for the study. Formal mediation testing was conducted using path analysis and structural equation modeling. Results: Respondents with prior adversities reported higher levels of destabilized autonomic reactivity, PTSD and depression symptoms, and worry related to COVID-19. Autonomic reactivity mediated the relation between adversity and all mental health variables (standardized indirect effect range for unadjusted models: 0.212-0.340; covariate-adjusted model: 0.183-0.301). Discussion: The data highlight the important role of autonomic regulation as an intervening variable in mediating the impact of adversity on mental health. Because of the important role that autonomic function plays in the expression of mental health vulnerability, brain-body oriented therapies that promote threat response reduction should be investigated as possible therapeutic targets.
- Published
- 2020
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22. Impaired Vagal Efficiency Predicts Auricular Neurostimulation Response in Adolescent Functional Abdominal Pain Disorders
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Katja Kovacic, Stephen W. Porges, Gregory F. Lewis, and Jacek Kolacz
- Subjects
Male ,Abdominal pain ,Adolescent ,Gastrointestinal Diseases ,medicine.medical_treatment ,Electric Stimulation Therapy ,Placebo ,03 medical and health sciences ,0302 clinical medicine ,Double-Blind Method ,Medicine ,Humans ,Pain Management ,Vagal tone ,Child ,Neurostimulation ,Pain Measurement ,Hepatology ,business.industry ,Gastroenterology ,Vagus Nerve ,Confidence interval ,Abdominal Pain ,Treatment Outcome ,Pain reduction ,030220 oncology & carcinogenesis ,Anesthesia ,Mixed effects ,030211 gastroenterology & hepatology ,Female ,medicine.symptom ,business - Abstract
Introduction To determine whether pretreatment vagal efficiency (VE), respiratory sinus arrhythmia, and heart period can predict pain improvement with auricular neurostimulation in pediatric functional abdominal pain disorders. Methods A total of 92 adolescents with functional abdominal pain disorders underwent a 4-week randomized, double-blinded, sham-controlled auricular neurostimulation trial. Electrocardiogram-derived variables at baseline were used to predict pain using mixed effects modeling. Results A 3-way interaction (95% confidence intervals: 0.004-0.494) showed that the treatment group subjects with low baseline VE had lower pain scores at week 3. There was no substantial change in the placebo or high VE treatment group subjects. This effect was supported by a significant correlation between baseline VE and degree of pain reduction only in the treatment group. Discussion Impaired cardiac vagal regulation measured by VE predicts pain improvement with auricular neurostimulation.
- Published
- 2020
23. X-MINE project (H2020): testing the capabilities of X-ray techniques in drill core scanning and ore sorting
- Author
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Stefan Lüth, Paul Attiwell, Jan-Erik Björklund, Kleio Grammi, Desislav Ivanov, Edward P. Lynch, Michael Gielda, Stefan Sädbom, Mikael Bergqvist, Edine Bakker, Evangelos Bakalis, Lotta Sartz, Juha Kalliopuska, Ronald Arvidsson, Karin Högdahl, Stepan Polansky, Janne Paaso, Nikolaos Arvanitidis, Marian Munteanu, and Jacek Kolacz
- Subjects
Core (optical fiber) ,Drill ,Mineralogy ,Ore sorting ,Geology - Abstract
The X-MINE project (Real-Time Mineral X-Ray Analysis for Efficient and Sustainable Mining), under the Horizon 2020 program (grant agreement no. 730270), combines high-energy XRF sensors, multi-energy XRT sensors and optical sensors to be able to support both drill core analysis and mineral sorting applications, including high speed processing of low-grade ores.The aims of the project are: (1) smart exploration, (2) selective (more efficient) drilling and (3) optimal extraction in existing mine operations. The expected effects of project outputs include: reduced quantity of mining waste by a better selection of the ore; reduced consumption of energy, explosives and other chemicals thus less CO2 and NO2 emissions; further critical raw materials acquisition for the EU; better planning of mining operations; increased resource efficiency.On the purpose of smart exploration, multi-parameter 3D near-mine ore deposit models were built, under SGU coordination, for 4 mining areas: Lovisagruvan(Sweden), Assarel(Bulgaria), Skouriotissa-Apliki(Cyprus) and Mavres Petres-Piavitsa(Greece).The project improves and combines various online sensing technologies, integrates the multi-sensor solution in an online analysis platform and demonstrates the solution in real mining operations. Two prototypes are being developed and demonstrated in the X-MINE project.(1) A sensitive transportable X-ray Analyser based on undertaken drill core scanning (GeoCore X10, delivered by Orexplore and further developed within X-Mine project). This performs penetrative combined and integrated XRF-XRT scanning, providing assaying of exploration drill cores and 3D tomographic imaging, that also allows linear and structural annotations and measures bulk density.(2) A complex analyser, developed by X-Mine consortium, integrated in a sorting line by Comex. The multisensory analyser unit uses XRT-XRF based scanners and 3D cameras, platforms, algorithms and software developed by Orexplore, VTT, Advacam, and Antmicro.The X-Mine project has reached the phase of pilot demonstration. The prototypes are being tested on various types of mineralisations and rocks from the four operating mines mentioned above. The tests done so far showed that the drill core scanner allows the tomographic observation and structural study of the cores, which could be ore-genetically evaluated and interpreted. Elemental composition is analysed and bulk density is measured for 1 m of core and calculated for segments as short as 8 mm based on estimated mineralogy. The scanning can be done at a speed of 3-4 meters of NQ-size drill core per hour with results available immediately and therefore useful while the drill rig is still on site.The development of the new X-MINE sorting application started with laboratory and full-scale tests, and base line studies of previously available dual-energy X-ray technology. A first full-scale initial test at Lovisagruvan indicated that 75% of available size fractions are amenable for sorting, although alternative crushing/size screening may increase sortable fractions. Laboratory and base line studies performed so far, at a speed of 17-20 tons / hour, indicate that waste rock may be reduced by as much as 22 % for some materials.The testing of the prototypes continues, with special focus on the calibration for different matrix/grade combinations and optimization of hardware, software, algorithms and productivity.
- Published
- 2020
24. Family nurture intervention in the NICU increases autonomic regulation in mothers and children at 4-5 years of age: Follow-up results from a randomized controlled trial
- Author
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Amie Ashley Hane, Jacek Kolacz, Raymond I. Stark, Stephen W. Porges, Katie Y. Kwon, Amanda L. Surman, Robert J. Ludwig, Joseph L. Barone, Michael M. Myers, and Martha G. Welch
- Subjects
Pediatrics ,Physiology ,Emotions ,Twins ,Social Sciences ,Nature versus nurture ,law.invention ,Cohort Studies ,Families ,Electrocardiography ,Randomized controlled trial ,Heart Rate ,law ,Medicine and Health Sciences ,Psychology ,Birth Weight ,Medicine ,Vagal tone ,Children ,Multidisciplinary ,Socioemotional selectivity theory ,medicine.diagnostic_test ,Mother-Child Relations ,Bioassays and Physiological Analysis ,Physiological Parameters ,Child, Preschool ,Infants ,Infant, Premature ,Research Article ,Cohort study ,Adult ,medicine.medical_specialty ,Drug Research and Development ,Birth weight ,Science ,Cardiology ,Mothers ,Autonomic Nervous System ,Research and Analysis Methods ,Intensive Care Units, Neonatal ,Heart rate ,Humans ,Clinical Trials ,Pharmacology ,business.industry ,Body Weight ,Electrophysiological Techniques ,Biology and Life Sciences ,Randomized Controlled Trials ,Respiratory Sinus Arrhythmia ,Autonomic Nervous System Diseases ,Age Groups ,People and Places ,Population Groupings ,Cardiac Electrophysiology ,Clinical Medicine ,business ,Follow-Up Studies ,Developmental Biology - Abstract
BackgroundMaturation of multiple neurobehavioral systems, including autonomic regulation, is altered by preterm birth. The purpose of this study was to determine the long-term effects of Family Nurture Intervention (FNI) in the NICU on autonomic regulation of preterm infants and their mothers.MethodA subset of infants and mothers (48% of infants, 51% of mothers) randomly assigned to either standard are (SC), or SC plus the FNI in the NICU in a prior RCT (ClincalTrials.gov; NCT01439269) returned for follow-up assessments when the children were 4 to 5 years corrected age (CA). ECGs were collected for 10 minutes in mothers and their children while children were in their mothers' laps. Heart rate, standard deviation for heart rate, respiratory sinus arrhythmia (RSA)-an index of parasympathetic regulation, and a measure of vagal efficiency were quantified.ResultsBoth children and mothers in the FNI group had significantly greater levels of RSA compared to the SC group (child: mean difference = 0.60, 95% CI 0.17 to 1.03, p = 0.008; mother: mean difference = 0.64, 95% CI 0.07 to 1.21, p = 0.031). In addition, RSA increased more rapidly in FNI children between infancy and the 4 to 5-year follow-up time point (SC = +3.11±0.16 loge msec2, +3.67±0.19 loge msec2 for FNI, pConclusionAlthough these preliminary follow-up results are based on approximately half of subjects originally enrolled in the RCT, they suggest that FNI-NICU led to healthier autonomic regulation in both mother and child, when measured during a brief face-to-face socioemotional interaction. A Pavlovian autonomic co-conditioning mechanism may underly these findings that can be exploited therapeutically.
- Published
- 2020
25. Evaluating Sensory Processing in Fragile X Syndrome: Psychometric Analysis of the Brain Body Center Sensory Scales (BBCSS)
- Author
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Melissa Raspa, Jacek Kolacz, Keri J. Heilman, and Stephen W. Porges
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Adult ,Male ,medicine.medical_specialty ,Psychometrics ,Sensory processing ,Autism Spectrum Disorder ,medicine.medical_treatment ,media_common.quotation_subject ,Sensation ,Sensory system ,Audiology ,Article ,03 medical and health sciences ,0302 clinical medicine ,Surveys and Questionnaires ,030225 pediatrics ,Perception ,Intellectual disability ,Developmental and Educational Psychology ,medicine ,Humans ,0501 psychology and cognitive sciences ,Registries ,Child ,Aged ,media_common ,Aged, 80 and over ,05 social sciences ,Brain ,Reproducibility of Results ,Middle Aged ,medicine.disease ,Fragile X syndrome ,Caregivers ,Autism spectrum disorder ,Polyvagal Theory ,Fragile X Syndrome ,Sensation Disorders ,Autism ,Female ,Psychology ,050104 developmental & child psychology - Abstract
Individuals with fragile X syndrome (FXS), especially those co-diagnosed with autism spectrum disorder (ASD), face many sensory processing challenges. However, sensory processing measures informed by neurophysiology are lacking. This paper describes the development and psychometric properties of a parent/caregiver report, the Brain-Body Center Sensory Scales (BBCSS), based on Polyvagal Theory. Parents/guardians reported on 333 individuals with FXS, 41% with ASD features. Factor structure using a split-sample exploratory-confirmatory design conformed to neurophysiological predictions. Internal consistency, test-retest, and inter-rater reliability were good to excellent. BBCSS subscales converged with the Sensory Profile and Sensory Experiences Questionnaire. However, data also suggest that BBCSS subscales reflect unique features related to sensory processing. Individuals with FXS and ASD features displayed more sensory challenges on most subscales.
- Published
- 2018
26. 20.5 Preliminary Evidence for Associations of the Infant Gut Colonization With Parent-Infant Relationship, Maternal Depression, Stress, and Parenting Styles
- Author
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Jacek Kolacz, Anna N. Ligezka, Magdalena Romanowicz, Martha Corral-Frias, Jennifer L. Vande Voort, Jun Chen, Summer Allen, Stephen Johnson, Brian A. Lynch, Paul E. Croarkin, and Jennifer Frank
- Subjects
Psychiatry and Mental health ,Gut colonization ,business.industry ,Stress (linguistics) ,Developmental and Educational Psychology ,Parenting styles ,Medicine ,business ,Maternal depression ,Developmental psychology - Published
- 2021
27. Music education, academic achievement, and executive functions
- Author
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Cathi B. Propper, Kelly R. Fisher, Michael T. Willoughby, Jacek Kolacz, Vanessa V. Volpe, Dennie Palmer Wolf, Sara R. Jaffee, and Steven J. Holochwost
- Subjects
Visual Arts and Performing Arts ,business.industry ,05 social sciences ,Short-term memory ,Standardized test ,Academic achievement ,Music education ,Executive functions ,050105 experimental psychology ,03 medical and health sciences ,0302 clinical medicine ,Developmental and Educational Psychology ,0501 psychology and cognitive sciences ,Psychology ,business ,030217 neurology & neurosurgery ,Applied Psychology ,Cognitive psychology - Published
- 2017
28. AVALIAçãO DA TECNOLOGIA ORE SORTING PARA GRANULADOS
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Neymayer Pereira Lima, Rodrigo Fina Ferreira, Luciana Gois, and Jacek Kolacz
- Published
- 2019
29. Sexual function in adults with a history of childhood maltreatment: Mediating effects of self-reported autonomic reactivity
- Author
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Yu Hu, Stephen W. Porges, Justin R. Garcia, Amanda N. Gesselman, Gregory F. Lewis, and Jacek Kolacz
- Subjects
Child abuse ,Adult ,Male ,Mediation (statistics) ,Social Psychology ,Adolescent ,Sexual Behavior ,Poison control ,Autonomic Nervous System ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,Erectile Dysfunction ,Surveys and Questionnaires ,Medicine ,Humans ,0501 psychology and cognitive sciences ,Psychological abuse ,Aged ,business.industry ,Adult Survivors of Child Abuse ,05 social sciences ,Middle Aged ,Clinical Psychology ,Autonomic nervous system ,Physical abuse ,Sexual abuse ,Female ,Self Report ,Sexual function ,business ,030217 neurology & neurosurgery ,050104 developmental & child psychology ,Clinical psychology - Abstract
OBJECTIVE A growing body of literature documents sexual problems following maltreatment and traumatic experience, but the mechanisms of these effects are poorly understood. The autonomic nervous system coordinates typical and threat-reactive functions throughout the body, including those of reproductive organs. We examined whether relations between adult sexual function problems and childhood maltreatment history could be mediated by an autonomic nervous system retuning with a bias toward maintaining a physiological state that supports defensive strategies. METHOD Self-reported data on childhood physical abuse, emotional abuse, sexual abuse, physical neglect, emotional neglect, autonomic reactivity, and adult sexual function were collected from an online sample of U.S. residents 18 years and older (189 males and 333 females). Mediation was tested using indirect effects in structural equation modeling with age as a covariate. RESULTS Mediation via subjective reports of autonomic reactivity was supported in males and females (standardized indirect effect in males = -.35 [95% CI: -.53, -.20]; females = -.09 [95% CI: -.17, -.03]). The direct effect of childhood maltreatment was not significant with the addition of the mediator, supporting full mediation. Follow-up analyses indicated that the mediation effect remained even after those with sexual abuse were excluded from the male model (standardized indirect effect = -.30 [95% CI: -.61, -.10]) but not the female model. CONCLUSIONS A chronic autonomic state that supports biobehavioral defense following abuse and trauma may contribute to adult sexual function problems, particularly in males and may point toward new treatment opportunities that target the autonomic nervous system. (PsycINFO Database Record (c) 2020 APA, all rights reserved).
- Published
- 2019
30. Traumatic stress and the autonomic brain‐gut connection in development: Polyvagal Theory as an integrative framework for psychosocial and gastrointestinal pathology
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Stephen W. Porges, Jacek Kolacz, and Katja Kovacic
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Psychotherapist ,Behavioral neuroscience ,Autonomic Nervous System ,Stress Disorders, Post-Traumatic ,03 medical and health sciences ,Behavioral Neuroscience ,0302 clinical medicine ,Developmental Neuroscience ,Developmental and Educational Psychology ,medicine ,Humans ,0501 psychology and cognitive sciences ,Depression (differential diagnoses) ,Socioemotional selectivity theory ,05 social sciences ,Traumatic stress ,Brain ,Vagus Nerve ,Gastrointestinal Tract ,Psychophysiology ,Polyvagal Theory ,Anxiety ,medicine.symptom ,Psychology ,Psychosocial ,030217 neurology & neurosurgery ,050104 developmental & child psychology ,Developmental Biology - Abstract
A range of psychiatric disorders such as anxiety, depression, and post-traumatic stress disorder frequently co-occur with functional gastrointestinal (GI) disorders. Risk of these pathologies is particularly high in those with a history of trauma, abuse, and chronic stress. These scientific findings and rising awareness within the healthcare profession give rise to a need for an integrative framework to understand the developmental mechanisms that give rise to these observations. In this paper, we introduce a plausible explanatory framework, based on the Polyvagal Theory (Porges, Psychophysiology, 32, 301-318, 1995; Porges, International Journal of Psychophysiology, 42, 123-146, 2001; Porges, Biological Psychology, 74, 116-143, 2007), which describes how evolution impacted the structure and function of the autonomic nervous system (ANS). The Polyvagal Theory provides organizing principles for understanding the development of adaptive diversity in homeostatic, threat-response, and psychosocial functions that contribute to pathology. Using these principles, we outline possible mechanisms that promote and maintain socioemotional and GI dysfunction and review their implications for therapeutic targets.
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- 2019
31. Sensory Difficulties in Children With an FMR1 Premutation
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Keri J. Heilman, Anne Wheeler, Jacek Kolacz, Melissa Raspa, Anne Edwards, Amanda Wylie, and Stephen W. Porges
- Subjects
congenital, hereditary, and neonatal diseases and abnormalities ,Sensory processing ,hyposensitivity ,lcsh:QH426-470 ,medicine.medical_treatment ,feeding behavior ,Sensory system ,Family income ,03 medical and health sciences ,0302 clinical medicine ,030225 pediatrics ,Genetics ,medicine ,Early childhood ,fragile X syndrome ,sensory processing ,Full mutation ,Genetics (clinical) ,business.industry ,medicine.disease ,FMR1 ,Fragile X syndrome ,lcsh:Genetics ,Molecular Medicine ,Autism ,hypersensitivity ,business ,FMR1 premutation ,030217 neurology & neurosurgery ,Clinical psychology - Abstract
Abnormal sensory processing is one of the core characteristics of the fragile X phenotype. Studies of young children with fragile X syndrome (FXS) and the FMR1 premutation have shown sensory challenges as early as infancy and into early childhood. This study sought to examine differences in sensory difficulties in children with an FMR1 premutation compared with children with FXS and typically developing children. We conducted an online survey of 176 parents of affected children (FXS or FMR1 premutation). Most respondents were mothers who are Caucasian (86%), have a 4-year college or graduate degree (68%), and are married (92%). Children ranged in age from 5 to 18, with a mean age of 13.0 years (3.3 SD). Participants completed the BBC Sensory Scales, a 50-item Likert-type scale (1 = Almost Always, 4 = Almost Never) comprised of 8 subscales that assessed auditory processing, visual processing, tactile processing, and eating and feeding behaviors. Mean scores were calculated for the items and each of the subscales. Non-parametric tests examined differences in child and family-level variables. Across all BBCSS subscales, children with an FMR1 premutation displayed more sensory challenges than typically developing children. For six out of the eight subscales, children with the full mutation had the lowest scores indicating more sensory challenges, but this was closely followed by children with an FMR1 premutation. Fragile X status was associated with seven of the eight subscales; children with an FMR1 premutation did not differ from children with FXS on any of the subscales but had more digestive problems than children with no fragile X. Gender, autism status, and family income were also related to sensory sensitivities. In conclusion, these data provide further evidence that some children with an FMR1 premutation experience sensory difficulties that are similar to children with FXS but different than typically developing children.
- Published
- 2018
32. Autonomic regulation of preterm infants is enhanced by Family Nurture Intervention
- Author
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Stephen W. Porges, Robert J. Ludwig, Michael M. Myers, Katie Y. Kwon, Jacek Kolacz, Amie Ashley Hane, Stephanie Okonmah‐Obazee, Maria I. Davila, Martha G. Welch, and Gregory F. Lewis
- Subjects
Cardiac function curve ,Male ,Pediatrics ,medicine.medical_specialty ,Neonatal intensive care unit ,Autonomic Nervous System ,law.invention ,03 medical and health sciences ,Behavioral Neuroscience ,Electrocardiography ,0302 clinical medicine ,Developmental Neuroscience ,Randomized controlled trial ,law ,Heart Rate ,Heart rate ,Outcome Assessment, Health Care ,Developmental and Educational Psychology ,medicine ,Heart rate variability ,Humans ,0501 psychology and cognitive sciences ,Vagal tone ,business.industry ,05 social sciences ,Postmenstrual Age ,Infant, Newborn ,Vagus Nerve ,Mother-Child Relations ,Respiratory Sinus Arrhythmia ,Polyvagal Theory ,Family Therapy ,Female ,business ,030217 neurology & neurosurgery ,Infant, Premature ,050104 developmental & child psychology ,Developmental Biology - Abstract
Preterm infants have maturational delays in several neurobehavioral systems. This study assesses the impact of the Family Nurture Intervention (FNI) in the neonatal intensive care unit (NICU) on the maturation of autonomic regulation of preterm infants. Preterm infants born at 26-34 weeks postmenstrual age (PMA) were assigned to groups receiving either standard care (SC) or SC plus FNI, using a randomized controlled trial design. At two collection time points, approximately 35 weeks and 41 weeks PMA, electrocardiograms (ECG) were monitored for approximately 1 hour during sleep. Heart rate and respiratory sinus arrhythmia (RSA) were quantified from the ECG. Across the two time points, the FNI group exhibited greater increases in RSA (Cohen's d = 0.35) and slope between RSA and heart rate, as a measure of vagal efficiency (Cohen's d = 0.62). These results document that FNI resulted in enhanced autonomic regulation consistent with greater maturation of cardiac function. These and previous findings strongly suggest that facilitating early nurturing interactions and emotional connection between preterm infants and their mothers is a practicable and effective means of optimizing postnatal development in preterm infants. Interpretation of these autonomic function results also enriches our understanding of the potential long-term beneficial outcomes of FNI by drawing upon polyvagal theory, which explains how autonomic state provides a neurophysiological platform for optimal co-regulation between infant and caregiver, and by drawing upon calming cycle theory, which provides a model for understanding how repeated mother/infant calming interactions positively condition autonomic state and reinforce approach, prosocial behaviors.
- Published
- 2018
33. Corrigendum: Chronic Diffuse Pain and Functional Gastrointestinal Disorders After Traumatic Stress: Pathophysiology Through a Polyvagal Perspective
- Author
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Jacek Kolacz and Stephen W. Porges
- Subjects
medicine.medical_specialty ,03 medical and health sciences ,0302 clinical medicine ,Fibromyalgia ,Hypothesis and Theory ,medicine ,respiratory sinus arrhythmia ,Vagal tone ,functional gastrointestinal disorders ,Intensive care medicine ,polyvagal theory ,Irritable bowel syndrome ,irritable bowel syndrome ,lcsh:R5-920 ,business.industry ,Traumatic stress ,Chronic pain ,heart rate variability ,Correction ,General Medicine ,medicine.disease ,Autonomic nervous system ,trauma ,Polyvagal Theory ,Anxiety ,Medicine ,030211 gastroenterology & hepatology ,fibromyalgia ,medicine.symptom ,business ,lcsh:Medicine (General) ,chronic pain ,030217 neurology & neurosurgery - Abstract
Chronic diffuse pain disorders, such as fibromyalgia, and functional gastrointestinal disorders (FGIDs), such as irritable bowel syndrome, place substantial burden on those affected and on the medical system. Despite their sizable impact, their pathophysiology is poorly understood. In contrast to an approach that focuses on the correlation between heart rate variability (HRV) and a specific organ or symptom, we propose that a bio-evolutionary threat-related autonomic response—as outlined in the Polyvagal Theory—may serve as a plausible explanation of how HRV, particularly respiratory sinus arrhythmia (RSA), would index the pathophysiology of these disorders. Evidence comes from: (1) the well-documented atypical autonomic regulation of the heart common to fibromyalgia and irritable bowel syndrome reflected in dampened RSA, (2) the neural architecture that integrates the heart, pain pathways, and the gastrointestinal tract, (3) the common physical co-morbidities shared by chronic diffuse pain and FGIDs, many of which are functionally regulated by the autonomic nervous system, (4) the elevated risk of chronic diffuse pain and FGIDs following traumatic stress or abuse, (5) and the elevated risk of chronic diffuse pain and FGIDs in individuals with anxiety and panic disorders. This novel conceptualization points to a pathogenesis rooted in changes to brain-body autonomic feedback loops in response to evolutionarily-salient threat cues, providing an integrated biopsychosocial model of chronic diffuse pain and FGIDs and suggesting new, non-pharmacological treatment strategies.
- Published
- 2018
34. The Integration of Vocal Communication and Biobehavioral State Regulation in Mammals: A Polyvagal Hypothesis
- Author
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Jacek Kolacz, Stephen W. Porges, and Gregory F. Lewis
- Subjects
Communication ,Vocal communication ,biology ,business.industry ,biology.organism_classification ,Prairie vole ,03 medical and health sciences ,0302 clinical medicine ,Prosocial behavior ,Polyvagal Theory ,Emotional expression ,030223 otorhinolaryngology ,business ,Psychology ,030217 neurology & neurosurgery - Abstract
The coordination of mammalian physiological and emotional states with the production and reception of acoustic signals is a product of evolution. Informed by the Polyvagal Theory (Porges, 1995 , 2001, 2011 ), this chapter describes the integrated neural pathways that link the regulation of supradiaphragmatic organs with hearing sensitivity and vocalization production. We propose that these neural links evolved as part of a mammalian social engagement system that coordinates physiological states between conspecifics to optimize and signal defensive and prosocial emotional responses. We further posit that the transfer function of middle ear structures provides an evolutionary constraint on mammalian species-specific vocal signals of safety or danger. This information may serve as a guide for interpreting the adaptive signaling functions of the frequency and spectrotemporal properties of vocalizations. Illustrative examples from human infant cries, African elephant (Loxodonta africana) calls, and prairie vole (Microtus ochrogaster) ultrasonic vocalizations are provided.
- Published
- 2018
35. Using acoustic features of mothers’ infant-directed speech to predict changes in infant biobehavioral state
- Author
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Jacek Kolacz, Gregory F. Lewis, Elizabeth B. daSilva, Stephen W. Porges, and Bennett I. Bertenthal
- Subjects
medicine.medical_specialty ,High frequency power ,Acoustics and Ultrasonics ,business.industry ,Stressor ,Body movement ,Audiology ,Social cue ,Distress ,Arts and Humanities (miscellaneous) ,Heart rate ,Medicine ,Spectrogram ,Vagal tone ,business - Abstract
Infant directed speech is marked by exaggerated frequency modulation and strong high frequency power, features that may provide physiological cues for mobilization or calming (Porges and Lewis, 2010; Kolacz et al., 2018). We examined whether these features predicted changes in infant biobehavioral state during the Still Face Paradigm, a stressor in which the mother withdraws and reinstates social cues. 98 mother-infant dyads participated when infants were 4-8 months old. Infant heart rate and respiratory sinus arrhythmia (a measure of cardiac parasympathetic control) were derived from an electrocardiogram (ECG). Infant behavioral distress was measured by vocal, facial, and body movement distress. Mothers’ vocalizations were measured using spectral analysis within designated frequency bands and modulation using a 2-dimensional fast Fourier transform of the audio spectrogram. Maternal frequency modulation predicted decreases in infant heart rate (p = .030), mid-frequency acoustic power (500–5000 Hz) predicted increases in cardiac parasympathetic regulation in infants with low parasympathetic tone (p = .024), and high frequency power predicted increases in infant behavioral distress in infants who were not initially distressed (p = .011). These results suggest that mothers’ vocal frequency band power and modulation may be aspects of infant-directed speech that are relevant for regulating infant biobehavioral state.
- Published
- 2019
36. Biobehavioral Insights into Adaptive Behavior in Complex and Dynamic Operational Settings: Lessons learned from the Soldier Performance and Effective, Adaptable Response Task
- Author
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Amy J. Haufler, Gregory F. Lewis, Maria I. Davila, Felipe Westhelle, James Gavrilis, Crystal I. Bryce, Jacek Kolacz, Douglas A. Granger, and William McDaniel
- Subjects
leadership ,military-relevant challenge ,media_common.quotation_subject ,Applied psychology ,Context (language use) ,050105 experimental psychology ,Task (project management) ,03 medical and health sciences ,0302 clinical medicine ,problem solving ,0501 psychology and cognitive sciences ,resilience ,media_common ,Original Research ,Adaptive behavior ,lcsh:R5-920 ,Recall ,Working memory ,05 social sciences ,adaptability ,heart rate variability ,Flexibility (personality) ,Cognition ,General Medicine ,electrodermal activity ,autonomic regulation ,Medicine ,Psychological resilience ,lcsh:Medicine (General) ,Psychology ,030217 neurology & neurosurgery - Abstract
The purpose of this study was to explore the biobehavioral correlates of adaptive behavior in the context of a standardized laboratory-based mission-relevant challenge [the Soldier Performance and Effective, Adaptable Response (SPEAR) task]. Participants were 26 healthy male volunteers (M = 34.85 years, SD = 4.12) with active military duty and leadership experience within the last 5 years (i.e., multiple leadership positions, operational deployments in combat, interactions with civilians and partner nation forces on the battlefield, experience making decisions under fire). The SPEAR task simultaneously engages perception, cognition, and action aspects of human performance demands similar to those encountered in the operational setting. Participants must engage with military-relevant text, visual, and auditory stimuli, interpret new information, and retain the commander’s intent in working memory to create a new plan of action for mission success. Time-domain measures of heart period and respiratory sinus arrhythmia (RSA) were quantified, and saliva was sampled [later assayed for cortisol and alpha-amylase (sAA)] before-, during-, and post-SPEAR. Results revealed a predictable pattern of withdraw and recovery of the cardiac vagal tone during repeated presentation of battlefield challenges. Recovery of vagal inhibition following executive function challenge was strongly linked to better task-related performance. Rate of RSA recovery was also associated with better recall of the commander’s intent. Decreasing magnitude in the skin conductance response prior to the task was positively associated with better overall task-related performance. Lower levels of RSA were observed in participants who reported higher rates of combat deployments, and reduced RSA flexibility was associated with higher rates of casualty exposure. Greater RSA flexibility during SPEAR was associated with greater self-reported resilience. There was no consistent pattern of task-related change in cortisol or sAA. We conclude that individual differences in psychophysiological reactivity and regulation in response to an ecologically valid, military-relevant task are associated with performance-related adaptive behavior in this standardized operational setting. The implications for modern day warfare, where advancing our understanding of the nature of individual differences in adaptive problem solving is critical to mission success, fitness for duty, and other occupational health-related outcomes, are discussed.
- Published
- 2017
37. Vagal Regulation of Cardiac Function in Early Childhood and Cardiovascular Risk in Adolescence
- Author
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Susan D. Calkins, Laurie Wideman, Susan P. Keane, James A. Janssen, Lilly Shanahan, Meghan J. Gangel, Jacek Kolacz, Ashley Brown, University of Zurich, and Gangel, Meghan J
- Subjects
Male ,Risk ,Cardiac function curve ,medicine.medical_specialty ,Adolescent ,Diastole ,Blood Pressure ,030204 cardiovascular system & hematology ,Article ,Prehypertension ,3202 Applied Psychology ,Body Mass Index ,03 medical and health sciences ,2738 Psychiatry and Mental Health ,0302 clinical medicine ,Millimeter of mercury ,Internal medicine ,medicine ,Humans ,Vagal tone ,Applied Psychology ,10093 Institute of Psychology ,Vagus Nerve ,Odds ratio ,Respiratory Sinus Arrhythmia ,Psychiatry and Mental health ,Endocrinology ,Blood pressure ,Cardiovascular Diseases ,Child, Preschool ,Cardiology ,Female ,Psychology ,150 Psychology ,Body mass index ,030217 neurology & neurosurgery ,Follow-Up Studies ,10190 Jacobs Center for Productive Youth Development - Abstract
Objective Poor behavioral self-regulation in the first 2 decades of life has been identified as an important precursor of disease risk in adulthood. However, physiological regulation has not been well studied as a disease risk factor before adulthood. We tested whether physiological regulation at the age of 2 years, in the form of vagal regulation of cardiac function (indexed by respiratory sinus arrhythmia [RSA] change), would predict three indicators of cardiovascular risk at the age of 16 years (diastolic and systolic blood pressure and body mass index). Methods Data came from 229 children who participated in a community-based longitudinal study. At the age of 2 years, children were assessed for RSA baseline and RSA change (ln(ms)) in response to a series of challenge tasks. These same children were assessed again at the age of 16 years for diastolic and systolic blood pressure (millimeters of mercury), height (meters), and weight (kilogram). Results Regression analyses revealed that less RSA withdrawal at the age of 2 years predicted higher diastolic blood pressure at the age of 16 years, adjusting for demographic characteristics (B = -3.07, M [S E] = 1.12, p = .006). Follow-up analyses demonstrated that these predictions extended to clinically significant levels of diastolic prehypertension (odds ratio = 0.43, 95% confidence interval = 0.22-0.89). RSA withdrawal did not significantly predict adolescent body mass index or systolic blood pressure. Conclusions Vagal regulation of cardiac function in early childhood predicts select indicators of cardiovascular risk 14 years later. Early signs of attenuated vagal regulation could indicate an increased risk for elevated blood pressure before adulthood. Future research should test biological, behavioral, and psychological mechanisms underlying these long-term predictions.
- Published
- 2017
38. Childhood temperament predictors of adolescent physical activity
- Author
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Susan D. Calkins, Lilly Shanahan, James A. Janssen, Laurie Wideman, Meghan J. Gangel, Susan P. Keane, Jacek Kolacz, University of Zurich, and Janssen, James A
- Subjects
Male ,Pediatrics ,medicine.medical_specialty ,Surgency ,Adolescent ,media_common.quotation_subject ,Poison control ,Pleasure ,03 medical and health sciences ,0302 clinical medicine ,Surveys and Questionnaires ,Injury prevention ,North Carolina ,Medicine ,Humans ,030212 general & internal medicine ,Longitudinal Studies ,Temperament ,Child ,Socioeconomic status ,Exercise ,media_common ,2. Zero hunger ,business.industry ,Physical activity ,10093 Institute of Psychology ,lcsh:Public aspects of medicine ,Public Health, Environmental and Occupational Health ,lcsh:RA1-1270 ,030229 sport sciences ,2739 Public Health, Environmental and Occupational Health ,Youth Risk Behavior Survey ,Childhood ,Adolescence ,Adolescent Behavior ,Child, Preschool ,Longitudinal ,Female ,business ,150 Psychology ,Body mass index ,Clinical psychology ,Research Article ,10190 Jacobs Center for Productive Youth Development - Abstract
Background Physical inactivity is a leading cause of mortality worldwide. Many patterns of physical activity involvement are established early in life. To date, the role of easily identifiable early-life individual predictors of PA, such as childhood temperament, remains relatively unexplored. Here, we tested whether childhood temperamental activity level, high intensity pleasure, low intensity pleasure, and surgency predicted engagement in physical activity (PA) patterns 11 years later in adolescence. Methods Data came from a longitudinal community study (N = 206 participants, 53% females, 70% Caucasian). Parents reported their children’s temperamental characteristics using the Child Behavior Questionnaire (CBQ) when children were 4 & 5 years old. Approximately 11 years later, adolescents completed self-reports of PA using the Godin Leisure Time Exercise Questionnaire and the Youth Risk Behavior Survey. Ordered logistic regression, ordinary least squares linear regression, and Zero-inflated Poisson regression models were used to predict adolescent PA from childhood temperament. Race, socioeconomic status, and adolescent body mass index were used as covariates. Results Males with greater childhood temperamental activity level engaged in greater adolescent PA volume (B = .42, SE = .13) and a 1 SD difference in childhood temperamental activity level predicted 29.7% more strenuous adolescent PA per week. Males’ high intensity pleasure predicted higher adolescent PA volume (B = .28, SE = .12). Males’ surgency positively predicted more frequent PA activity (B = .47, SE = .23, OR = 1.61, 95% CI: 1.02, 2.54) and PA volume (B = .31, SE = .12). No predictions from females’ childhood temperament to later PA engagement were identified. Conclusions Childhood temperament may influence the formation of later PA habits, particularly in males. Boys with high temperamental activity level, high intensity pleasure, and surgency may directly seek out pastimes that involve PA. Indirectly, temperament may also influence caregivers’ perceptions of optimal activity choices for children. Understanding how temperament influences the development of PA patterns has the potential to inform efforts aimed at promoting long-term PA engagement and physical health.
- Published
- 2017
39. Advanced separation technologies for pre-concentration of metal ores and the additional process control
- Author
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Jacek Kolacz
- Subjects
lcsh:GE1-350 ,Engineering ,Operations research ,business.industry ,Separation (aeronautics) ,0211 other engineering and technologies ,Sorting ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,Environmental sciences ,Identification (information) ,Pattern recognition (psychology) ,Process control ,GE1-350 ,021108 energy ,Sensor-based sorting ,Process engineering ,business ,Pre concentration ,lcsh:Environmental sciences ,Energy (signal processing) ,0105 earth and related environmental sciences - Abstract
A new sensor based sorting system has been developed at Comex, based on complex image analysis. The sorting system employs different images generated by visible light and X-ray to provide maximal information about processed particles. Application of X-ray makes it possible to analyse the internal structure of the particles, which provides a 2D image with the valuable information. The advanced system for the texture and the pattern recognition is applied to analyse these images simultaneously, to provide the required identification of the particles for efficient separation. The paper describes a number of tests during sorting of Cu-Zn-Sn ores with high separation efficiency. As an example, the Cu content is enriched from 0.4% to 1.25% and the Zn content is increased from 0.83% to 2.24%. In addition, the performance of the X-ray sorting system is described for enrichment of Zn-Pb ore and compared with the heavy media separation technology. Simplifying the pre- concentration through the use of the sorting technology can significantly reduce the cost of these operations. Finally, the operating data from the sorting system have been analysed regarding a potential use for controlling the plant operation. This can bring the new tools for control strategies for the complex processing plants.
- Published
- 2017
40. Individual differences in the activity of the hypothalamic pituitary adrenal axis: Relations to age and cumulative risk in early childhood
- Author
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Jean Louis Gariépy, W. Roger Mills-Koonce, Jacek Kolacz, Steven J. Holochwost, Douglas A. Granger, and Cathi B. Propper
- Subjects
Male ,Saliva ,medicine.medical_specialty ,Aging ,Hypothalamo-Hypophyseal System ,Hydrocortisone ,Endocrinology, Diabetes and Metabolism ,Individuality ,Physiology ,Pituitary-Adrenal System ,Context (language use) ,03 medical and health sciences ,0302 clinical medicine ,Endocrinology ,Risk Factors ,Internal medicine ,medicine ,Childbirth ,Humans ,0501 psychology and cognitive sciences ,Early childhood ,Cortisol level ,Biological Psychiatry ,Endocrine and Autonomic Systems ,05 social sciences ,Infant ,Cumulative risk ,Psychiatry and Mental health ,medicine.anatomical_structure ,Child, Preschool ,Marital status ,Female ,Psychology ,030217 neurology & neurosurgery ,Hypothalamic–pituitary–adrenal axis ,050104 developmental & child psychology - Abstract
This study examined individual differences in the function of the hypothalamic-pituitary-adrenal (HPA) axis with regard to age and cumulative risk during challenging laboratory tasks administered at 6, 12, 24, and 36 months. Saliva samples were collected from a majority-minority sample of N=185 children (57% African American, 50% female) prior to and following these tasks and later assayed for cortisol. Cumulative distal risk was indexed via a composite of maternal marital status, maternal education, income-to-needs ratio, the number of children in the household, and maternal age at childbirth. Probing of hierarchical models in which cortisol levels and age were nested within child revealed significant differences in cortisol as a function of both age and cumulative risk, such that children exposed to high levels of risk exhibited higher levels of cortisol both within and across age. These results highlight the sensitivity of the HPA axis to environmental context at the level of the individual, even as that sensitivity is manifest against the background of species-typical biological development.
- Published
- 2016
41. Patterns of joint parasympathetic, sympathetic, and adrenocortical activity and their associations with temperament in early childhood
- Author
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Steven J. Holochwost, Jacek Kolacz, W. Roger Mills-Koonce, and Jean Louis Gariépy
- Subjects
Male ,Hypothalamo-Hypophyseal System ,Sympathetic Nervous System ,media_common.quotation_subject ,Child Behavior ,Pituitary-Adrenal System ,Negative affectivity ,Developmental psychology ,03 medical and health sciences ,Behavioral Neuroscience ,0302 clinical medicine ,Joint activity ,Developmental Neuroscience ,Baseline activity ,Parasympathetic Nervous System ,Developmental and Educational Psychology ,Humans ,0501 psychology and cognitive sciences ,Early childhood ,Temperament ,media_common ,05 social sciences ,Autonomic nervous system ,Positive affectivity ,Child, Preschool ,Female ,Psychology ,Stress reactivity ,030217 neurology & neurosurgery ,050104 developmental & child psychology ,Developmental Biology - Abstract
Evidence has accrued to show that autonomic and adrenocortical systems act in coordination to facilitate responses to environmental opportunities and threats. In the current study, we used cluster analysis to examine whether individual differences in patterns of joint baseline activity among the parasympathetic and sympathetic branches of the autonomic nervous system with the hypothalamic-pituitary-adrenal axis are associated with parent-reported temperamental positive and negative affectivity in 36-month old children. The resulting clusters corresponded to the sensitive, buffered, and vigilant patterns as predicted by the adaptive calibration model of stress responsivity (Del Giudice et al., 2011) and included a novel pattern. Cluster memberships predicted differences in overall negative affectivity and its subscales, but no associations were found with positive affectivity. These results provide evidence that the joint activity of physiological systems at rest may underlie temperamental differences in negative affect.
- Published
- 2015
42. Assessing body awareness and autonomic reactivity: Factor structure and psychometric properties of the Body Perception Questionnaire-Short Form (BPQ-SF)
- Author
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Jacek Kolacz, Stephen W. Porges, Guillem Pailhez, Andrea Bulbena-Cabre, Ana Cabrera, and Antonio Bulbena
- Subjects
Adult ,Male ,Psychometrics ,Population ,Autonomic Nervous System ,Body awareness ,050105 experimental psychology ,Interoception ,Developmental psychology ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Humans ,0501 psychology and cognitive sciences ,Reactivity (psychology) ,education ,education.field_of_study ,05 social sciences ,Autonomic Pathways ,Reproducibility of Results ,Original Articles ,Awareness ,Middle Aged ,Psychiatry and Mental health ,Autonomic nervous system ,Convergent validity ,Polyvagal Theory ,Female ,Psychology ,030217 neurology & neurosurgery - Abstract
Body awareness and reactivity dysfunction are characteristic of a range of psychiatric disorders. Although the neural pathways communicating between the body and brain that contribute to these experiences involve the autonomic nervous system, few research tools for studying subjective bodily experiences have been informed by these neural circuits. This paper describes the factor structure, reliability, and convergent validity of the Body Awareness and Autonomic Reactivity subscales of the Body Perception Questionnaire‐Short Form (BPQ‐SF). Exploratory and confirmatory factor analyses were applied to data from three samples collected via the internet in Spain and the US and a college population in the US (combined n = 1320). Body awareness was described by a single factor. Autonomic reactivity reflected unique factors for organs above and below the diaphragm. Subscales showed strong reliability; converged with validation measures; and differed by age, sex, medication use, and self‐reported psychiatric disorder. Post hoc analyses were used to create the 12‐item Body Awareness Very Short Form. Results are discussed in relation to the distinct functions of supra‐ and sub‐diaphragmatic autonomic pathways as proposed by the Polyvagal Theory and their potential dysfunction in psychiatric disorders.
- Published
- 2017
43. Ultrafine grinding in an air-swept ball mill circuit
- Author
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Knut L. Sandvik and Jacek Kolacz
- Subjects
Grinding process ,Materials science ,Geochemistry and Petrology ,Power consumption ,Metallurgy ,Mill ,Geotechnical Engineering and Engineering Geology ,Dispersion (chemistry) ,Ball mill ,Closed circuit ,Air classifier ,Grinding - Abstract
Fine grinding in a ball mill working in closed circuit with a forced vortex air classifier has been investigated in continuous laboratory scale. The ball mill was tested as a grate discharge mill and as an air-swept mill. Feldspar was chosen for the tests. The grinding process was also studied in connection with production of materials in different size classes. The final products had top sizes of 40, 20 and 10 microns. The air-swept mill configuration provided the best results both on energy and capacity basis. During production of material with top size of 40 microns, it was possible to increase the grinding capacity up to 28% when compared to the grate discharge mill configuration. This difference dropped to 20% during production of 10 micron size material. A corresponding decrease in power consumption was observed. The grate discharge mill could hardly produce such a fine material because the fine particles coated the grinding media and the lining of the mill. The internal classification in the air-swept mill made it possible to remove fines from the mill to prevent a slowing-down effect of the grinding. This internal classification furthermore resulted in good dispersion of the material discharged from the mill, reduced circulating load and lowered mill temperature.
- Published
- 1996
44. Know-how as an In-kind Contribution to Commercial Companies: An in a Nutshell Analysis under the Polish Company Law
- Author
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Jacek Kolacz
- Subjects
Law ,Political science ,Corporate law ,In kind ,Intellectual property ,Know-how ,Valuation (finance) - Abstract
This present paper presents a few thoughts on specific, yet very important, problem pertaining to corporate law arising from making an in-kind contribution in a form of know-how. The issue in question has been discussed under the Polish law with special emphasis put on issues referring to know-how valuation.
- Published
- 2011
45. Polish Company Law: A Few Remarks on Legal History and Foreign Inspirations
- Author
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Jacek Kolacz
- Subjects
Engineering ,business.industry ,Law ,media_common.quotation_subject ,Corporate law ,Legal history ,business ,Conformity ,media_common - Abstract
This paper presents an “in a nutshell” version of the Polish company law history and its development from the beginning of the 20th century till the year 2009. The emphasis is added not only on the country specificity but also on the EU-law conformity analysis supported by few international background remarks. Some statistical data has also been provided to make the overall picture of the Polish companies’ condition more complete.
- Published
- 2009
46. Why Some Boys 'Bash and Crash'
- Author
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James A. Janssen, Susan P. Keane, Meghan J. Gangel, Vanessa V. Volpe, Susan D. Calkins, Laurie Wideman, Lilly Shanahan, and Jacek Kolacz
- Subjects
medicine.medical_specialty ,media_common.quotation_subject ,medicine ,Physical Therapy, Sports Therapy and Rehabilitation ,Orthopedics and Sports Medicine ,Crash ,Temperament ,Psychiatry ,Psychology ,media_common ,Clinical psychology - Published
- 2015
47. Ultrafine grinding in an air-swept ball mill circuit
- Author
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Jacek Kolacz and Knut Lyng Sandvik
- Published
- 1996
48. Developing a standardised measure of psychological safety
- Author
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Liza Morton, Nicola Cogan, Jacek Kolacz, Damien John Williams, Marek Nikolic, and Stephen Porges
49. Covid-19 stress, burnout and risk perception among health and social care workers in Scotland
- Author
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Nicola Cogan, Gillian MacIntyre, Gary Tanner, Liza Morton, Chloe Kennedy, Zoe Beck, Xi Liu, and Jacek Kolacz
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