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Objective: The hand is an extremely unique structure with its own characteristics that should be better understood. To determine the relationship between joint position sense (JPS), hand anthropometrics, and grip strength (GS) in healthy individuals. Methods: Both hands of 50 healthy adults were evaluated. The anthropometric characteristics (AC) were determined using small paper insertion tape. Hand and finger strength were measured using hand dynamometry and a pinchometer, respectively. The wrist JPS was evaluated for wrist flexion, extension, and deviations via a position error test using a goniometer. Results: AC and GS were positively correlated with both the dominant and non-dominant sides in all parameters (p<0.05). There was a significant positive relationship between palmar GS and wrist flexion JPS error on the dominant side (p=0.039, r=0.292) and on the non-dominant side (p=0.033, r=-0.303). There was no significant relationship between JPS and the AC of any other GS parameters (p>0.05). Conclusion: The use of anthropometric data in calculating GS, as well as other complimentary data, can be utilized to determine the type and diversity of exercise for physiotherapy and rehabilitation program organization. The results showed a weak correlation between wrist JPS, AC, and GS. In conclusion, our study showed that AC can be used as an indicator of GS, but GS alone is insufficient to indicate joint position. [ABSTRACT FROM AUTHOR]

Abstract Background Hand grip strength (HGS) and pinch strength are important clinical measures for assessing the hand and overall health. Objective The aim of the present study is to predict HGS and pinch strength based on 1 hand anthropometry, and (2) body anthropometric parameters using machine learning. Methods A Secondary analysis was conducted on 542 participant aged 30–60 years from the Persian Organizational Cohort study in Mashhad University of Medical Sciences. Artificial Neural Network (ANN) were fitted as prediction model. The dataset was divided into two sets: a training set, which comprised 70% of the data, and a test set, which comprised 30% of the data. Various combinations of the hand anthropometric, demographic, and body anthropometric parameters were used to determine the most accurate model. Results The optimal HGS model, using the input of gender, body mass, and hand anthropometric parameters of length (both total length and palm), maximum width, maximum breadth, and hand shape index, achieved nearly equal accuracy to the model that incorporated all variables (RMSE = 5.23, Adjusted R2 = 0.67). As for pinch strength, gender, hand length (both total length and palm), maximum width, maximum breadth, hand shape index, hand span, and middle finger length came closest to the model incorporating all variables (RMSE = 1.20, Adjusted R2 = 0.52). Conclusion This ANN model showed that hand anthropometric parameters of total length, palm length, maximum width, maximum breadth, and the hand shape index, emerge as optimal predictors for both HGS and HPS. Body anthropometric factors (e.g., body mass) play roles as predictors for HGS, whereas their influence on pinch strength appears to be less pronounced. Level of evidence Level III (Diagnosis). Trial registration Not applicable.

Abstract Background Iron deficiency anemia (IDA) constitutes a considerable nutritional problem in Egyptian preschool children. Moreover, IDA limits physical activity performance and interferes with children's development. Accordingly, we aim to investigate the correlation between IDA and hand dexterity and pinch grip strength in preschool children. Results This observational cross-sectional study encompassed the participation of 87 children, comprising both genders, with an age range of 5–6 years. The cohort was initially stratified into three distinct groups: Group A comprised 36 non-anemic children, group B included 25 children with mild iron-deficiency anemia (IDA), and group C consisted of 26 children with moderate IDA. After group delineation, comprehensive laboratory analyses were performed on all participants to assess for IDA, involving a thorough examination of their complete blood picture, hemoglobin (Hb) levels, serum iron levels, and serum ferritin levels. The evaluative metrics employed in this study encompassed the Bruininks-Oseretsky Test of Motor Proficiency-Second Edition (BOT-2) and the Baseline Mechanical Pinch Gauge. These instruments were utilized to assess manual dexterity and pinch strength, specifically tip-to-tip and tripod strength. This investigation revealed a positive correlation between Hb, serum iron, and serum ferritin levels with both manual dexterity and pinch strength across all three groups. Conclusion This study highlights that IDA negatively affects hand dexterity and pinch grip strength in preschool children. Managing IDA early is crucial for improving their physical performance and overall development.

Background: Normative data on hand and precision grip strengths are essential for evaluating the level of development, the efficacy of rehabilitation, and treatment results. The need for established norms of grip strength in Polish children is one of the problems that Polish physiotherapists and physicians face when treating upper limbs. The aim was to establish normative values of hand and precision grips strengths in Polish children and adolescents aged 3–19. Methods: In the years 2012–2023, a sample of 358 children and adolescents with no history of upper limb injuries or congenital upper extremity defects were randomly chosen from kindergartens, primary schools, middle schools, and high schools. They were living in urban agglomerations and in smaller towns or villages. Hand and precision grips like the pincer, three-point, side, and opposition grip strength were assessed using a hand dynamometer and pinchmeter in standard positions. Results: The strength in all types of examined hand grips increases with chronological age in both genders. The grip strength was higher in the boys' group than in the girls' and it was higher in the right hand than in the left, but the difference was no more greater than 10%. Detailed data with standard deviation were presented in the form of a table, divided by age and sex. Conclusions: Norms for grip strength were provided for Polish children and adolescents aged 3–19, allowing therapists and physicians to compare Polish patients with that of normally developed, healthy children of the same age and sex. [ABSTRACT FROM AUTHOR]

AbstractPurposeMethodsResultsConclusions\nIMPLICATIONS FOR REHABILITATIONTo summarize and critically appraise the quality of studies investigating psychometric properties of pinch strength assessment.Medical literature up to February 2024 was searched for studies reporting on at least one measurement property of pinch strength assessment. The quality of the evidence and the risk of bias were rated using COSMIN 2018 guidelines.Thirty-three studies (1962 participants) were included. The majority (16/19) of reliability studies were of adequate to very good quality. Seven of 12 studies of validity were rated as adequate or very good. The quality of the eight responsiveness studies was adequate. Reliability was good to excellent (ICC > 0.75) for neurological conditions, and excellent (ICC > 0.90) for musculoskeletal disorders and healthy participants. Pinch strength showed strong to very strong correlations with grip strength (r = 0.72–0.92), moderate to strong correlations with assessments of dexterity (r = 0.78–0.80), and weak to moderate correlation with patient-reported outcome measures (r = 0.03–0.50). Varied results were found for pinch strength responsiveness in a small number of studies.Pinch strength assessment is reliable. Validity and responsiveness are less reported, but there is a strong correlation between pinch and grip strength, and a moderate correlation with dexterity.This review demonstrated that the reliability of pinch strength assessment is good to excellent.Clinicians can measure pinch strength and expect accurate results over repeated measurements and between raters.There is a strong correlation between pinch and grip strength, and a moderate correlation between pinch strength and hand dexterity.The low correlation between pinch strength and patient-reported outcome measures highlights the need to measure these outcomes independently of each other.This review demonstrated that the reliability of pinch strength assessment is good to excellent.Clinicians can measure pinch strength and expect accurate results over repeated measurements and between raters.There is a strong correlation between pinch and grip strength, and a moderate correlation between pinch strength and hand dexterity.The low correlation between pinch strength and patient-reported outcome measures highlights the need to measure these outcomes independently of each other. [ABSTRACT FROM AUTHOR]

Background: Iron deficiency anemia (IDA) constitutes a considerable nutritional problem in Egyptian preschool children. Moreover, IDA limits physical activity performance and interferes with children's development. Accordingly, we aim to investigate the correlation between IDA and hand dexterity and pinch grip strength in preschool children. Results: This observational cross-sectional study encompassed the participation of 87 children, comprising both genders, with an age range of 5–6 years. The cohort was initially stratified into three distinct groups: Group A comprised 36 non-anemic children, group B included 25 children with mild iron-deficiency anemia (IDA), and group C consisted of 26 children with moderate IDA. After group delineation, comprehensive laboratory analyses were performed on all participants to assess for IDA, involving a thorough examination of their complete blood picture, hemoglobin (Hb) levels, serum iron levels, and serum ferritin levels. The evaluative metrics employed in this study encompassed the Bruininks-Oseretsky Test of Motor Proficiency-Second Edition (BOT-2) and the Baseline Mechanical Pinch Gauge. These instruments were utilized to assess manual dexterity and pinch strength, specifically tip-to-tip and tripod strength. This investigation revealed a positive correlation between Hb, serum iron, and serum ferritin levels with both manual dexterity and pinch strength across all three groups. Conclusion: This study highlights that IDA negatively affects hand dexterity and pinch grip strength in preschool children. Managing IDA early is crucial for improving their physical performance and overall development. [ABSTRACT FROM AUTHOR]

Background: Previous investigations have shown a positive relationship between baseball pitching velocity and the kinetic chain involved in pitching motion. However, no study has examined the influence of finger characteristics on pitching velocity and rate of spin via a sensor-embedded baseball. Methods: Twenty-one pitchers volunteered and were recruited for this study. An experimental baseball embedded with a force sensor and an inertial measurement unit was designed for pitching performance measurement. Finger length and strength were measured as dependent variables. Spin rate and velocity were independent variables. Pearson product–moment correlations (r) and intraclass correlation coefficients (ICCs) determined the relationship between finger characteristics and pitching performance. Results: Finger length discrepancy, two-point pinch strength, index finger RFD (rate of force development), middle finger impulse, and force discrepancy had significant correlations with spin rate (r = 0.500~0.576, p ≤ 0.05). Finger length discrepancy, two-point pinch, three-point pinch strength, index and middle finger RFD, middle finger impulse, and force combination had significant correlations with fastball pitching velocity (r = 0.491~0.584, p ≤ 0.05). Conclusions: Finger length discrepancy, finger pinch strength, and pitching finger force including maximal force and RFD may be factors that impact fastball spin rate and fastball pitching velocity. [ABSTRACT FROM AUTHOR]

Objectives. This study examines the role of different machine learning (ML) algorithms to determine which socio-demographic factors and hand–forearm anthropometric dimensions can be used to accurately predict hand function. Methods. The cross-sectional study was conducted with 7119 healthy Iranian participants (3525 males and 3594 females) aged 10–89 years. Seventeen hand–forearm anthropometric dimensions were measured by JEGS digital caliper and a measuring tape. Tip-to-tip, key and three-jaw chuck pinches were measured using a calibrated pinch gauge. Subsequently, 21 features pertinent to socio-demographic factors and hand–forearm anthropometric dimensions were used for classification. Furthermore, 12 well-known classifiers were implemented and evaluated to predict pinches. Results. Among the 21 features considered in this study, hand length, stature, age, thumb length and index finger length were found to be the most relevant and effective components for each of the three pinch predictions. The k-nearest neighbor, adaptive boosting (AdaBoost) and random forest classifiers achieved the highest classification accuracy of 96.75, 86.49 and 84.66% to predict three pinches, respectively. Conclusions. Predicting pinch strength and determining the predictive hand–forearm anthropometric and socio-demographic characteristics using ML may pave the way to designing an enhanced tool handle and reduce common musculoskeletal disorders of the hand. [ABSTRACT FROM AUTHOR]

Abstract Background and aims Patients undergoing maintenance hemodialysis (MHD) experience increased mortality and cardiovascular disease (CVD) risks; however, the potential connection between pinch strength (PS) and the prognosis of these patients remains unknown. Consequently, this study aimed to comprehensively assess the influence of PS and handgrip strength (HGS) on both survival and cardiovascular events (CVE) in patients undergoing MHD. Methods Data were gathered from patients undergoing MHD at the Hemodialysis Center of Guangzhou Red Cross Hospital in March 2021. We performed a retrospective follow-up spanning 24 months, with death serving as the primary endpoint for observation and CVE as the secondary endpoint. Multifactorial Cox regression analysis, Kaplan–Meier survival curves, trend tests, and restricted cubic spline were applied to explore the association. Results During a 24-month follow-up, data were collected from 140 patients undergoing MHD with an average age of 66.71 ± 12.61 years. Among them, 52 (37.14%) experienced mortality, whereas 36 (40.00%) had CVE without baseline CVD. Kaplan–Meier survival curves demonstrated better survival rates and reduced CVE risk for patients in the second, third, and fourth quartiles compared with those in the first quartile for PS. Adjusted analyses in different models revealed higher PS levels were independently associated with all-cause mortality (major model, model 4, HR, 0.78; 95% CI, 0.64–0.95) but not with CVE risk (unadjusted HR, 0.90; 95% CI, 0.77–1.05). Compared with lower quartile PS levels, higher PS levels significantly reduced all-cause mortality (HR, 0.31; 95% CI, 0.10–1.02), and this trend remained consistent (P for trend = 0.021). Finally, the restricted cubic spline method using different models showed a linear relationship between PS and all-cause mortality (P > 0.05), when PS exceeded 4.99 kg, the all-cause mortality of MHD patients significantly decreased. Conclusions PS was independently associated with all-cause mortality but not with CVE in patients undergoing MHD.

Background and aims: Patients undergoing maintenance hemodialysis (MHD) experience increased mortality and cardiovascular disease (CVD) risks; however, the potential connection between pinch strength (PS) and the prognosis of these patients remains unknown. Consequently, this study aimed to comprehensively assess the influence of PS and handgrip strength (HGS) on both survival and cardiovascular events (CVE) in patients undergoing MHD. Methods: Data were gathered from patients undergoing MHD at the Hemodialysis Center of Guangzhou Red Cross Hospital in March 2021. We performed a retrospective follow-up spanning 24 months, with death serving as the primary endpoint for observation and CVE as the secondary endpoint. Multifactorial Cox regression analysis, Kaplan–Meier survival curves, trend tests, and restricted cubic spline were applied to explore the association. Results: During a 24-month follow-up, data were collected from 140 patients undergoing MHD with an average age of 66.71 ± 12.61 years. Among them, 52 (37.14%) experienced mortality, whereas 36 (40.00%) had CVE without baseline CVD. Kaplan–Meier survival curves demonstrated better survival rates and reduced CVE risk for patients in the second, third, and fourth quartiles compared with those in the first quartile for PS. Adjusted analyses in different models revealed higher PS levels were independently associated with all-cause mortality (major model, model 4, HR, 0.78; 95% CI, 0.64–0.95) but not with CVE risk (unadjusted HR, 0.90; 95% CI, 0.77–1.05). Compared with lower quartile PS levels, higher PS levels significantly reduced all-cause mortality (HR, 0.31; 95% CI, 0.10–1.02), and this trend remained consistent (P for trend = 0.021). Finally, the restricted cubic spline method using different models showed a linear relationship between PS and all-cause mortality (P > 0.05), when PS exceeded 4.99 kg, the all-cause mortality of MHD patients significantly decreased. Conclusions: PS was independently associated with all-cause mortality but not with CVE in patients undergoing MHD. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Medical & Pharmaceutical Sciences is the property of Arab Journal of Sciences & Research Publishing (AJSRP) 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.)

Abstract A bag-valve-mask (BVM) is a first aid tool that can easily and quickly provide positive-pressure ventilation in patients with breathing difficulties. The most important aspect of BVM bagging is how closely the mask adheres to the patient’s face when the E–C technique is used. In particular, the greater the adhesion force at the apex of the mask, the greater the tidal volume. The purpose of this study was to investigate the effect of various weights applied to the mask’s apex and the pinch strength needed to perform the E–C technique, on tidal volume. In this prospective simulation study, quasi-experimental and equivalent time-series designs were used. A total of 72 undergraduate paramedic student from three universities were recruited using convenience sampling. The tidal volumes according to the weights (0 g, 100 g, 200 g, 300 g) applied to the apical area of the mask, handgrip strength, and pinch strength (tip pinch strength, key pinch strength, and tripod pinch strength) were measured. A linear mixed model analysis was performed. Linear mixed model analyses showed that tidal volume was significantly higher at 200 g (B = 43.38, p = 0.022) and 300 g (B = 38.74, p = 0.017) than at 0 g. Tripod pinch strength (B = 12.88, p = 0.007) had a significant effect on mask adhesion for effective BVM ventilation. Adding weight to the apical area of the mask can help maintain the E–C technique and enable effective ventilation. Future studies are required to develop specific strategies to improve the ventilation skills, which can be an important first-aid activity.

A bag-valve-mask (BVM) is a first aid tool that can easily and quickly provide positive-pressure ventilation in patients with breathing difficulties. The most important aspect of BVM bagging is how closely the mask adheres to the patient’s face when the E–C technique is used. In particular, the greater the adhesion force at the apex of the mask, the greater the tidal volume. The purpose of this study was to investigate the effect of various weights applied to the mask’s apex and the pinch strength needed to perform the E–C technique, on tidal volume. In this prospective simulation study, quasi-experimental and equivalent time-series designs were used. A total of 72 undergraduate paramedic student from three universities were recruited using convenience sampling. The tidal volumes according to the weights (0 g, 100 g, 200 g, 300 g) applied to the apical area of the mask, handgrip strength, and pinch strength (tip pinch strength, key pinch strength, and tripod pinch strength) were measured. A linear mixed model analysis was performed. Linear mixed model analyses showed that tidal volume was significantly higher at 200 g (B = 43.38, p = 0.022) and 300 g (B = 38.74, p = 0.017) than at 0 g. Tripod pinch strength (B = 12.88, p = 0.007) had a significant effect on mask adhesion for effective BVM ventilation. Adding weight to the apical area of the mask can help maintain the E–C technique and enable effective ventilation. Future studies are required to develop specific strategies to improve the ventilation skills, which can be an important first-aid activity. [ABSTRACT FROM AUTHOR]

Copyright of Turkiye Klinikleri Journal of Health Sciences / Türkiye Klinikleri Sağlık Bilimleri Dergisi is the property of Turkiye Klinikleri 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.)

Objective：To analyze the characteristics of muscle strength around the shoulder and wrist joints of the ipsilateral and contralateral upper limbs of stroke patient. Method：A total of 30 stroke patients with hemiplegia were selected as the observation group, and 30 healthy people of the same age were selected as the control group. In the observation group, all patients underwent bilateral shoulder and wrist isokinetic muscle strength tests (60°/s and 120°/s), grip strength and pinch strengthtest, and upper extremity motor evoked potential (MEP) test by transcranial magnetic stimulation. In the healthy control group, the limbs corresponding to the affected side of the observation group were detected. The correlation analysis was performed between the results of isokinetic muscle strength test on the affected side of the observation group and FMA-UE and upper limb MEP. Result：①Isokinetic muscle strength test：At 60°/s and 120°/s, compared with those of the healthy side and the control group, the peak torque (PT), total work (TW) and average power (AP) of shoulder flexor and extensor muscles, shoulder adductors and abductors and wrist flexor and extensor muscles of the affected side in the observation group were significantly decreased (P<0.05). At 60°/s, compared with those of the healthy people, the PT, TW and AP values of the shoulder flexor and extensor muscles, shoulder adductors and abductors and wrist flexors and extensors in the observation group showed a downward trend. And the PT, TW and AP values of the shoulder adductors decreased with statistical significance(P<0.05). At 120°/s, compared with the healthy people, the PT, TW and AP values of the shoulder flexor and abductor muscles on the healthy side of the observation group all showed a downward trend. The PT and AP of the shoulder extensor muscle, and the PT, TW and AP of the shoulder adductor muscle decreased with statistical significance (P<0.05)；the PT and AP value of the wrist flexor muscle and the PT value of the wrist extensor muscle showed a downward trend. ② Grip strength and pinch strength test：The grip strength, lateral pinch strength and fingertip pinch strength of the affected side of the observation group were significantly lower than those of the unaffected side and the healthy people (P<0.05). The grip strength, lateral pinch strength and fingertip pinch strength of the unaffected side of the observation group were significantly lower than those of the healthy people (P< 0.05). ③Neuroelectrophysiological test：The MEP latency and central motor conduction time (CMCT) of the affected upper limb were significantly longer than those of the healthy side and healthy person (P<0.05)； There was no significant difference in the MEP latency and CMCT between the healthy upper limb and the healthy people (P>0.05). ④Correlation analysis：In the observation group, isokinetic muscle strength of the muscle groups around the shoulder and wrist joints of the affected side were significantly positively correlated with FMA-UE(P<0.05), while had no correlation with MEP latency and CMCT of the affected upper limb. Conclusion：Stroke patients with hemiplegia have bilateral muscle strength decline, and after Brunnstrom Ⅲ, muscle strength may not be related to motor nerve conduction velocity. Future research and clinical treatment should expand the focus beyond the affected side and advocate bilateral assessment and training. [ABSTRACT FROM AUTHOR]

Introduction: Rheumatoid arthritis (RA) causes structural damage that causes joint deformity including metacarpophalangeal (MCP) joint ulnar drift (UD), thus hindering the pinch strength and the functional ability of the hand. Orthosis or splints are designed to maintain the hand's function, improve joint alignment, restore biomechanical balance, and reduce tissue stress. Limited studies have been done on the effects of dynamic splint on pinch strength and functional ability. Therefore, the purpose of this study was to evaluate and quantify the effects of dynamic MCP splint in treatment of ulnar deviation of RA on pinch strength and functional ability in women. Methods: Twenty women with RA were recruited and completed a 4-week intervention period with dynamic MCP splint. Pinch strength and functional ability score were measured at baseline and after 4 weeks. Results: The results showed a significant improvement in pinch strength (mean ± SD, 11.68 ± 2.14 to 13.53 ± 2.14; P = 0.000) and functional ability score (mean ± SD, 22.70 ± 9.12 to 19.70 ± 8.14; P = 0.000). Conclusion: The results of this study show that the dynamic MCP splint had a positive impact on rheumatoid hands that align the joints in their functional position. The dynamic MCP splint improved the mechanical stability of the hand, thus reducing pain and stress on joints, which in turn improves the pinch strength and functional ability of rheumatoid hand. Clinical Relevance: To increase patient acceptance and use of the splint, the splint designed and used in this study was compact and only covered the affected areas and joints of the hand. Because there was no involvement of the wrist joint and the fingertips were free, the splint was lightweight and allowed the patient to perform activity while wearing it. [ABSTRACT FROM AUTHOR]

Abstract Background The association of cognition with hand grip and pinch strength has been well-recognized in older adults. The authors sought to explore: (1) associations among forward head posture (FHP), cognition, and hand grip and pinch strength in older adults; and (2) the mediator role of FHP in these pathways using structural equation modeling (SEM). Methods This cross-sectional study included 88 older adults (70.5% male; mean age = 68.75±3.87 years). Cognition was assessed by the Mini-Mental State Examination (MMSE), head posture by the Craniovertebral Angle (CVA) obtained from photographic analysis, hand grip strength by a handheld dynamometer, and pinch strength by a pinch meter. Using the two SEMs, a potential mediator role of the CVA was investigated. While the MMSE was addressed as an independent variable in both models, hand grip and pinch strength were addressed as dependent variables in model 1 and model 2, respectively. Results The correlations between the CVA and MMSE (r = 0.310), hand grip strength (r = 0.370), and pinch strength (r = 0.274 to 0.292) were statistically significant (p

Background: Previous investigations have shown a positive relationship between baseball pitching velocity and the kinetic chain involved in pitching motion. However, no study has examined the influence of finger characteristics on pitching velocity and rate of spin via a sensor-embedded baseball. Methods: Twenty-one pitchers volunteered and were recruited for this study. An experimental baseball embedded with a force sensor and an inertial measurement unit was designed for pitching performance measurement. Finger length and strength were measured as dependent variables. Spin rate and velocity were independent variables. Pearson product–moment correlations (r) and intraclass correlation coefficients (ICCs) determined the relationship between finger characteristics and pitching performance. Results: Finger length discrepancy, two-point pinch strength, index finger RFD (rate of force development), middle finger impulse, and force discrepancy had significant correlations with spin rate (r = 0.500~0.576, p ≤ 0.05). Finger length discrepancy, two-point pinch, three-point pinch strength, index and middle finger RFD, middle finger impulse, and force combination had significant correlations with fastball pitching velocity (r = 0.491~0.584, p ≤ 0.05). Conclusions: Finger length discrepancy, finger pinch strength, and pitching finger force including maximal force and RFD may be factors that impact fastball spin rate and fastball pitching velocity.

Even in the first application of patients with early complaints of trigger finger, pinch strength of the hand may be affected. Therefore, it is difficult to assess the change of strength as a result of treatment in this problem. In this study, we aimed to evaluate the change of strength taking into account both measured and expected pinch strengths before and after A1 pulley release surgery. Thirty fingers (9 thumbs, 12 middle, 8 ring and 1 index fingers) of 26 patients (17 women, 9 men) who underwent A1 pulley release were included into this study. The mean age of the patients was 53 (16–71). Tip-to-tip finger pinch strengths were measured pre-operatively and at 3 months postoperatively. The expected strengths were calculated using the values obtained from the healthy side and taking into account the dominance effect. In the analysis, pre-operative and postoperative measured strength/expected strength ratios were compared. The mean of measured pinch strength/expected pinch strength ratio was 0.91 ± 0.3 pre-operatively and 1.14 ± 0.3 postoperatively (p < 0.05). With the calculation method used in this study, it was found that there was a significant increase in the tip-to-tip pinch strength after surgical A1 pulley release for the trigger finger. III (Retrospective cohort study). [ABSTRACT FROM AUTHOR]

Introduction: The prime requisites of a good digital arthrodesis are a painless and stable union in a proper position. Arthrodesis of the distal interphalangeal joint of the fingers is not without potential complications including nonunion, malunion, and deep tissue infections. The Shark Screw® is a human, cortical bone allograft for osteosynthesis and an alternative to metal or bioabsorbable devices in orthopedics and trauma surgery. The primary hypothesis is that the fusion and complication rate, using the Shark Screw®, is at least similar to those reported in the literature, using metal or bioabsorbable screws. Material and methods: This retrospective cohort study analyzes the fusion and complication rate and the patient satisfaction of distal interphalangeal joint arthrodesis of 27 fingers with the human allogeneic cortical bone screw. Complications, Disabilities of Arm, Shoulder, and Hand Questionnaire (Quick-DASH) score and Michigan Hand Outcomes Questionnaire (MHQ) score, grip and pinch strength and fusion angle were investigated. Results: The mean follow-up was 23 months. At 6 weeks after surgery, fusion was obtained for all fingers. There was no surgical complication that required revision surgery. An average fusion angle of 13.6° ± 10.7° was measured. VAS pain score decreased significantly from 6.9 before surgery to 0.14 after surgery. The Quick-DASH score decreased from 10.7 to 7.8. The MHQ score improved in all sub-scores. Conclusion: The complication rates, using the Shark Screw® for DIP joint arthrodesis, are lower compared to the results reported in the literature for other surgical techniques. Complications related to the human allograft cortical bone screw itself were not observed. The bone screw is completely remodeled into the host bone and further hardware removal is not necessary. Level of evidence: IV. [ABSTRACT FROM AUTHOR]

Objective: Muscle strength, which correlates with the compound muscle action potential (CMAP), can also be estimated by measuring the CMAP. Therefore, we evaluated the CMAP of the flexor muscles of the whole forearm to identify their muscle strength. Methods: Fourteen healthy volunteers were enrolled. The elbow was determined to be the stimulation point, and the recording site for the flexor muscles of the whole forearm was set at approximately 8 cm distal to the elbow. We prospectively evaluated the baseline-to-peak amplitude of the CMAP of the whole forearm flexor muscles (WFFM), including that obtained from the median nerve stimulation (WFFMm), ulnar nerve stimulation (WFFMu), and their sum (WFFMsum). Additionally, we analyzed the relationships between WFFMm and WFFMu amplitudes with other quantitative parameters, including grip strength and routine CMAP amplitudes. Results: The CMAP’s test–retest analysis revealed high reliability. Grip power was significantly correlated with WFFMm and WFFMsum and mildly correlated with WFFMu. Tip-pinch strength with WFFMm and flexor pollicis longus (FPL) measurements correlated significantly. Lateral-pinch strength was significantly correlated with the first dorsal interosseous muscle (FDI) measurements but not with WFFM. The abductor digiti minimi (ADM) and abductor pollicis brevis (APB) were not correlated with grip power or pinch strength. Conclusions: By electrophysiology examination, this study demonstrated that WFFMm is involved in grip power and other pinch strengths. This method may serve as a novel tool for measurement of distal muscle strengths. Significance: This is the first study to attempt to evaluate the muscle strength of forearm flexor muscles by measuring the CMAP.

Background: The association of cognition with hand grip and pinch strength has been well-recognized in older adults. The authors sought to explore: (1) associations among forward head posture (FHP), cognition, and hand grip and pinch strength in older adults; and (2) the mediator role of FHP in these pathways using structural equation modeling (SEM). Methods: This cross-sectional study included 88 older adults (70.5% male; mean age = 68.75±3.87 years). Cognition was assessed by the Mini-Mental State Examination (MMSE), head posture by the Craniovertebral Angle (CVA) obtained from photographic analysis, hand grip strength by a handheld dynamometer, and pinch strength by a pinch meter. Using the two SEMs, a potential mediator role of the CVA was investigated. While the MMSE was addressed as an independent variable in both models, hand grip and pinch strength were addressed as dependent variables in model 1 and model 2, respectively. Results: The correlations between the CVA and MMSE (r = 0.310), hand grip strength (r = 0.370), and pinch strength (r = 0.274 to 0.292) were statistically significant (p < 0.001). In addition, significant associations were found between the MMSE and hand grip and pinch strength, ranging from 0.307 to 0.380 (p < 0.001). The mediation analysis showed that the standardized total (β = 0.41, p < 0.001) and indirect (mediated) effects (β = 0.12, p = 0.008) of the MMSE on hand grip strength were significant in model (1) The results were similar for model (2) The standardized total (β = 0.39, p = 0.001) and indirect effects (β = 0.10, p = 0.026) of the MMSE on pinch strength were significant. As a partial mediator in both models, the CVA explained 29% and 26% of the total effect in models 1 and 2, respectively. Conclusions: The CVA was associated with the MMSE, hand grip strength, and pinch strength, and CVA partially mediates the association of the MMSE with grip and pinch strength in older adults, indicating that cognition had an effect on grip and pinch strength through an indirect path via head posture. This finding reveals that evaluating head posture and providing corrective therapeutic interventions as needed may be beneficial in reducing the negative impact of decreased cognition on motor functions in older adults. [ABSTRACT FROM AUTHOR]

Background: The present study was aimed to compare the grip/pinch strengths and manual dexterity of individuals with and without the use of cannabis and its derivatives. Methods: A cross-sectional prospective study was conducted with 66 individuals, including 33 cases with the use of cannabis (and its derivatives) and 33 age- and sex-matched controls. Grip and pinch strengths were evaluated with a dynamometer. The Nine-Hole Peg Test (9HPT), Minnesota Manual Dexterity Test (MMDT), and Michigan Hand Outcomes Questionnaire (MHQ) were used to assess the hand function. Results: The hand grip strength and dominant hand 2-point pinch (2PP) grip strength were less in individuals with substance use disorder (SUD) (p < 0.05). The 9HPT duration of the SUD patients was higher (p < 0.05). On the other hand, the MMDT insertion and rotation test results were different between the groups (p < 0.05). Grip strength was related with the MMDT insertion and rotation tests (r = −0.411 to −0.480). There was significant correlation between grip strength with dominant hand 9HPT (r = −0.370) and between dominant hand 3-point pinch (3PP) strength with MMDT insertion (r = −0.378). In addition, dominant hand 2PP strength was correlated with overall hand function of MHQ (r = 0.382). Conclusion: The individuals with cannabis use disorder showed reduced grip strength on both sides and decreased 2PP strength on the dominant side compared to healthy individuals. In addition, there is a decrease in the hand skills of individuals with cannabis use disorder. Decreased grip strength of individuals with cannabis use disorder affected their hand skills negatively. [ABSTRACT FROM AUTHOR]

It remains controversial whether aging influences motor learning and whether physiological factors, such as local strength or fitness, are associated with fine motor performance and learning in older adults (OA). OA (n = 51) and young adults (YA, n = 31) performed a short-term motor learning session using a precision grip force modulation task. The rate of improvement of OA compared with YA was steeper with respect to performance variability and temporal precision. Both age groups showed positive transfer during an unpracticed variant of the force modulation task. Local muscle strength (pinch and grip strength) and high cardiovascular fitness positively predicted fine motor performance, whereas initial performance, muscle strength, and motor fitness (heterogeneous motor test battery) negatively predicted rate of improvement. Analyses indicated potentials, but also limits of plasticity for OA. [ABSTRACT FROM AUTHOR]

Background. Pinch strength is a simple, affordable, and effective way to measure upper-limb function. The study aims to determine how anthropometric variables affect maximal pinch strength in normal individuals. Methods. One hundred and eighteen participants were included in the study using non-probability, non-random convenience sampling technique. The pinch strength was measured three times in each participant with a gap of 5 s in each reading. The measurement was taken with elbow in 90-degree flexion and forearm in mid prona- tion position. The data was then encoded in SPSS v25 for statistical analysis. Pearson's correlation and Multiple linear regression analysis was performed on the data. Results. A total sample 118 participants included 54 males (45.7%) and 65 female (55.1%) participants, with mean age of 23.19 (SD = 2.02) and mean weight of 64.24 kg (SD = 12.4). The mean pinch strength was 9.23 kg (SD = 3.9). The r-value of Pearson's correlation between the max pinch strength and age, weight, height and BMI were negative 0.052 (p = 0.707), 0.576, 0.564, 0.384 (p < 0.01), respectively. The R-squared and adjusted R-squared value for the multiple linear regression model were 0.328 and 0.327 respectively. Conclusions. The maximal pinch strength is influenced by the basic anthropometric factors including weight, height, and BMI. The strongest indicator of pinch strength in normal persons is body weight. [ABSTRACT FROM AUTHOR]

• Pinch MVC (maximal voluntary contraction) is not correlated to dexterity • Pinch MVC and E-MVC (extension maximal voluntary contraction) values have different decline over ageing. • No difference in E-MVC (extension maximal voluntary contraction) was observed between hands • In heaviest occupations there is no difference in Palmar pinch MVC between hands • The anthropometric factor most correlated with pinch MVCs is height Cross-sectional study. Flexion (Palmar Pinch, PP-MVC and Tip Pinch, TP-MVC) and extension (E-MVC) maximal voluntary contraction (MVC) of the index-thumb system offers a quick way to estimate the level of hands' impairment in several musculoskeletal and neurologic conditions. This study established normative data of PP-MVC, TP-MVC, E-MVC in the Italian population and evaluated their correlation with hand dominance, anthropometric factors, dexterity and workload level. In our study, 303 healthy people (150F, 153M) were recruited. Participants performed PP-MVC, TP-MVC and E-MVC tests per hand, conducted by using a pinch-gauge. T-test was used to analyze MVC means between sexes and between hands. One-way ANOVA was conducted to compare MVC means in male and female samples stratified by age (18-29, 30-44, 45-59, 60-74, +75). Spearman's correlation analysis was performed to determine anthropometric variables, dexterity and workload level effects on MVCs. Medium-to-large effect sizes of age were shown in the majority of tasks. The 30 to 44 years and then +75 years age groups showed the highest and the lowest values, respectively, for both sex and both hands. Men were meanly 50% stronger, and the dominant hand showed higher values (6-10%). MVC-tests correlated moderately with weight and height weakly with dexterity and workload level. After 30 to 44 years, hand strength declines in line with the normal process of aging that also entails muscle fibers and the reduction of daily activities in older adults. In relative terms, E-MVC showed the highest strength loss in the over 75 seconds. The difference between sexes was higher in E-MVC than in flexion MVCs. E-MVC seems to depend more on musculoskeletal architecture that differs from women to men, according to the highest correlation between E-MVC and anthropometric variables. Only high workload levels impacted hand strength. In heaviest occupations, no PP-MVCs differences were observed between hands. [ABSTRACT FROM AUTHOR]

The objective of this retrospective analysis of prospectively collected data was to assess the test-retest reliability and validity of the elevated arm stress test (EAST) as measured by the duration in a cohort of patients with suspected neurogenic thoracic outlet syndrome (NTOS). Patients evaluated for NTOS between January 2017 and September 2018 were identified. Test-retest reliability by the intraclass correlation coefficient was determined for duration of the EAST. For the validity analysis, patients were classified in a proven NTOS group or a symptomatic control group without NTOS using the Society for Vascular Surgery reporting standards and the outcome of thoracic outlet decompression surgery. A receiver operating characteristic curve was made for the duration of EAST. The area under the curve, and positive and negative predictive values were calculated for the EAST. In total, 428 patients with suspected NTOS were retrospectively analyzed. Of these patients, 61 were excluded because no EAST data was available. Another 101 patients were excluded because of inconclusive reporting standards, arterial or venous TOS, or because thoracic outlet decompression surgery was not performed or had a negative result. The validity analysis in the remaining 266 patients showed an area under the curve for the duration of the EAST of 0.62 (95% confidence interval, 0.55-0.69). The positive predictive value of the duration ranged between 65% and 66%, and the negative predictive value between 53% and 58%. For the test-retest reliability analysis, 118 patients were excluded because they performed only one measurement in a 100-day time period. Analysis in the remaining 148 patients showed an intraclass correlation coefficient value of 0.65 (95% confidence interval, 0.55-0.74) for duration. The EAST measured by the duration showed a moderate test-retest reliability, but the discriminative value was low in the diagnosis of NTOS. The outcome of the EAST measured by the duration should be used with caution. The elevated arm stress test (EAST) has an important role in the current Society for Vascular Surgery reporting standards for neurogenic thoracic outlet syndrome (NTOS), but the reliability and diagnostic value of the EAST is debated. This study shows the limitations of the conventional EAST in NTOS diagnostics and follow-up. The performance of the EAST measured by the duration showed a moderate test-retest reliability, but the discriminative value was low in the diagnosis of NTOS. This indicates that this provocation test should be used with caution in NTOS diagnostics. [ABSTRACT FROM AUTHOR]

Objectives. This study aimed to investigate the relationship between dentists' hand functionality (handgrip, tip-to-tip pinch, key pinch and palmar pinch strengths) and dental specialty (maxillofacial surgery, endodontics, pediatric dentistry), socio-demographic factors and hand–forearm anthropometric dimensions. Methods. A cross-sectional study was designed in which 720 certified dentists (330 males and 390 females) voluntarily participated in the study. A tape measure (±0.1 cm) and a digital caliper (±0.1 mm) were used to measure anthropometric dimensions. A Jamar dynamometer and pinch gauge were used to measure hand strength variables. Results. Hand strengths decreased with age and clinical experience, and were always greater in male than female dentists. Maxillofacial surgeons aged 35–39 years attained the highest values of handgrip and key pinch strengths, while endodontists aged 30–34 years attained the peak values of tip-to-tip pinch strength. Among the measured hand dimensions, forearm circumference was significantly greater in maxillofacial surgeons compared with endodontists and pediatric dentists. Conclusion. Hand functionality is specialty-related among dentists because distinct dental specialties expose practitioners to different task demands. Like any other manual workers, dentists need more ergonomic and usable hand tools tailored not only to the intended application but also to the anthropometry of users. [ABSTRACT FROM AUTHOR]

Study Design Retrospective case series. Purpose This study aimed to examine the efficacy of composite grip strength as a marker of surgical outcome in patients with moderate to severe degenerative cervical myelopathy. Overview of Literature Degenerative cervical myelopathy causes loss of dexterity, muscle strength, and sensations in the hand. The impact of surgical management on improvement in composite grip strength has received scant attention. Methods This retrospective study was performed on degenerative cervical myelopathy patients with a complete composite grip strength assessment between January 2013 to January 2019. The Biometrics E-link hand kit was used for the assessment. The following parameters were measured: maximum grip strength, sustained grip strength, three-jaw pinch, maximum key pinch, and sustained key pinch. The pre- and postoperative functional status was assessed using the Nurick grade and the modified Japanese Orthopaedic Association (mJOA) score. Results A total of 40 patients were included in the study. The mean patient age was 51.9 years. The mean preoperative Nurick grade was 3.5 and the mJOA score was 10.9. The anterior approach was used in 25 patients, and the posterior approach was used in 15 patients. Four patients developed complications. Degenerative cervical myelopathy resulted in decreased handgrip and pinch strength as compared to normative Indian data. There was a significant improvement in the postoperative composite grip strength for all five parameters. There was no differential improvement between the anterior and posterior surgical groups. The improvement in the composite grip strength correlated with the improvement in functional scores. Conclusions Composite grip strength analysis is an objective method for assessing the impact of degenerative cervical myelopathy on grip strength and monitoring the postoperative improvement. Decompressive surgery resulted in global improvement in all the parameters of composite grip strength.

Objetivo La ansiedad y/o depresión juegan un papel fundamental en la forma en la que el paciente afronta la patología osteoarticular. El objetivo de este estudio es describir el impacto de los trastornos del estado de ánimo en la artrosis trapeciometacarpiana (TMC).

Introduction: Anthropometric hand dimensions are used in the design of hand instruments for improving the efficiency and human comfort of surgical equipment and instruments. Instruments built for large male hands make it more difficult for petite female hands to operate them, which reduces their productivity and increases the risk of musculoskeletal diseases. So, the present study was undertaken to evaluate the differences in anthropometric and biomechanical parameters between the dominant hands of adult Indian males and females. Methods: The study was conducted on 335 Indian health care professionals of which 168 were males and 167 were females. Various anthropometric and biomechanical parameters were measured on the dominant hand of all the individuals included in the study. Length, breadth and span of a hand, as well as wrist circumference, were measured by measuring tape while handgrip strength and pinch strength was recorded by Jamar dynamometer & Jamar pinch gauge respectively. Obtained data were analyzed by applying the t-test SPSS version 27. We considered P-value

Aim: This study was conducted to compare pinch and grip strength of patients with carpal tunnel syndrome undergoing release to normative values preoperatively and postoperatively. Methods: Clinical data collected on grip and pinch strength of 50 hands with carpal tunnel syndrome was compared to appropriately matched normative data. Results: There were definite improvements in strength after 4 weeks of postsurgical release and some subjects continued to have significant deficits compared to the normative data. Conclusion: Patients with carpal tunnel syndrome have moderate to large weakness in grip and pinch strength in comparison to normative data. Carpal Tunnel Release may reduce this weakness; however, carpal tunnel syndrome patients may often have with residual problems at 4 weeks and may take up to 1 year to resolve completely. [ABSTRACT FROM AUTHOR]

In this study, we aimed to determine the anthropometric variables that affect grip strength and to investigate how and to what extent these variables change grip strength in elite athletes and non-athletes. Totally, 74 subjects aged between 18 and 27 participated in this study in two groups including: elite athletes (n=32), and non-athletes (n=42). In our study, 26 hand anthropometric variables were measured on each subject’s dominant hand. The selection of the anthropometric parameters was limited only to those that are considered to have an association with handgrip strength. Independent t-test or Mann-Whitney U Test was applied for group comparison. Stepwise multiple linear regression analysis was utilized and Backward selection procedure was also performed to identify the relationship between handgrip strength and anthropometric measurements. Results revealed that some anthropometric measurements of hand significantly higher in elite athlete group than non-athlete group in males and females (p lt;0.05). In conclusion, we found that some hand anthropometric parameters are different in the grip sports and non-athletes, but we cannot exactly determine whether specific sport activities affect these differences or the inherent characteristics of athletes lead them to these sports. Also the handgrip strength of hand related athletes was more than that of non-athletes. This may be because of hand anthropometric parameters. Actually, good positive correlation between handgrip strengths and anthropometric characteristics of hand in grip athletes showed the effect of hand anthropometry on handgrip strength in athletes who use their hands for grasping a ball or opponent.

Study Design: Retrospective case series. Purpose: This study aimed to examine the efficacy of composite grip strength as a marker of surgical outcome in patients with moderate to severe degenerative cervical myelopathy. Overview of Literature: Degenerative cervical myelopathy causes loss of dexterity, muscle strength, and sensations in the hand. The impact of surgical management on improvement in composite grip strength has received scant attention. Methods: This retrospective study was performed on degenerative cervical myelopathy patients with a complete composite grip strength assessment between January 2013 to January 2019. The Biometrics E-link hand kit was used for the assessment. The following parameters were measured: maximum grip strength, sustained grip strength, three-jaw pinch, maximum key pinch, and sustained key pinch. The pre- and postoperative functional status was assessed using the Nurick grade and the modified Japanese Orthopaedic Association (mJOA) score. Results: A total of 40 patients were included in the study. The mean patient age was 51.9 years. The mean preoperative Nurick grade was 3.5 and the mJOA score was 10.9. The anterior approach was used in 25 patients, and the posterior approach was used in 15 patients. Four patients developed complications. Degenerative cervical myelopathy resulted in decreased handgrip and pinch strength as compared to normative Indian data. There was a significant improvement in the postoperative composite grip strength for all five parameters. There was no differential improvement between the anterior and posterior surgical groups. The improvement in the composite grip strength correlated with the improvement in functional scores. Conclusions: Composite grip strength analysis is an objective method for assessing the impact of degenerative cervical myelopathy on grip strength and monitoring the postoperative improvement. Decompressive surgery resulted in global improvement in all the parameters of composite grip strength. [ABSTRACT FROM AUTHOR]

To reach agreement on standardized protocols for assessing upper limb strength and grip and pinch force for upper limb reconstructive surgery for tetraplegia. Selected members of an expert panel composed of international therapists formed at the 2018 International Congress for Upper Limb Surgery for Tetraplegia conducted a literature review of current practice that identified gaps and inconsistencies in measurement protocols and presented to workshop attendees. To resolve discrepancies, a set of questions was presented to workshop attendees who voted electronically. Consensus was set at 75% agreement. For manual muscle testing, consensus was reached for using the Medical Research Council scale, without plus or minus, and the use of resistance through range when testing grade 4 and grade 5 strength. Pectoralis major and serratus anterior should be routinely tested, however there was no consensus on other shoulder muscles. Grip and pinch strength should be tested according to the American Society of Hand Therapists positioning. For grip strength, either the Jamar or Biometrics dynamometer expressed in kilograms should be used. For grip and pinch strength, three measurements should be performed at each testing. No consensus was reached on a device for pinch strength. This work is an important step to enable comparable data in the future. Further consensus methods will work toward developing more comprehensive guidelines in this population. Building international consensus for pre- and postoperative measures of function supports objective evaluation of novel therapies and interpretation of multicenter studies. [ABSTRACT FROM AUTHOR]

The tip pinch is one of the most delicate and precise movement of the hand, and it is used to manipulate small objects, commonly observed in the activities of daily living of any individuals. Individuals with Parkinson Disease (PD) with impaired manual dexterity, manipulative skills, and hand weakness have an important barrier for activities of daily life. However, the dynamometer usually used for measuring the tip pinch have a high cost, so, validate a sphygmomanometer can make this assessment more accessible. To investigate the validity of the modified sphygmomanometer test in the evaluation of tip pinch strength when compared to the gold standard. 50 individuals with idiopathic PD took part in the study. The muscle strength of tip pinch on the dominant and non-dominant side was measured by the modified sphygmomanometer test and the gold standard, the dynamometer. Concurrent validity was analyzed using Pearson's correlation coefficient. 50 individuals diagnosed with idiopathic PD, mean age of 67 ± 8.0 years, 68% male, mean time of diagnosis in months of 84 ± 66 and Hoehn and Yahr mean of 2.5 ± 0.6. There was a significant correlation of moderate magnitude between the modified sphygmomanometer test and the dynamometer in dominant side (r = 0.44; p < 0.01) and non-dominant side (r = 0.48; p < 0.01). The modified sphygmomanometer test showed adequate validity for assessing the muscle strength of the tip pinch in individuals with PD. [ABSTRACT FROM AUTHOR]

In lateral material handling tasks, which is very common in industries, warehouse systems, and other sectors, the workers can lead to work-related musculoskeletal disorders (WMSDs) because of the task and work designs, especially in upper extremities. WMSDs in hand, wrist, and fingers cause workers to have health problems, in pain and uncomfortable, hence decrease their working productivity and efficiency. The workstations distances are one of the factors that might affect workers when they perform manual material handling laterally, which can lead to WMSDs in hands. Hence, there is a need to study the relationship between transfer distances with the hand grip and pinch strengths. An experiment was carried out with 30 male participants to identify the relationship of lateral transfer distances with the hand grip and pinch strengths. The results obtained from the experiment were further investigated and analysed by using repeated measure one-way MANOVA and graphs. The results had proved that in the distances of 1.0 m, 1.25 m and 1.5 m did not affect one’s hand grip and pinch strengths. But, the postures and movements were varied based on distances. ABSTRAK: Pengangkutan barang atau bahan secara lateral amat biasa dalam industri, gudang dan sektor-sektor lain, dan kerja ini akan menyebabkan pekerja menghadapi penyakit gangguan muskuloskeletal berkaitan kerja (WMSDs) terutamanya di bahagian tangan. WMSDs yang melibatkan tangan dan jari menyebabkan pekerja mempunyai masalah kesihatan secara kekal dan mengalami kesakitan serta tidak-keselesaan. Secara tidak langsung, masalah ini telah mengurangkan prestasi mereka ketika bekerja. Syarikat terpaksa memberi bayaran yang tinggi kepada pekerja untuk kos perubatan and mengalami kerugian besar kerana pekerja yang tidak datang bekerja disebabkan penyakit tersebut. Jarak antara dua stesen kerja adalah faktor yang menyebabkan penyakit ini dihadapi oleh pekerja. Oleh itu, kajian diperlukan untuk mengkaji hubungan antara jarak dan kekuatan genggaman tangan serta jari. Satu esperimen yang melibatkan 30 orang lelaki responden telah dijalankan untuk mengenal pasti hubungan antara jarak dan ganggaman tangan serta jari. Hasil daripada esperimen telah dikaji dan dianalisiskan dengan menggunakan MANOVA dan grafs. Hasil kajian telah membuktikan bahawa jarak dalam 1.0m, 1.25m dan 1.5m tidak membawa apa-apa kesan terhadap genggaman tangan dan jari. Cara dan pergerakan responden adalah berbeza dan disebabkan oleh jarak, walaubagaimanapun, cara dan pergerakan responden tidak membawa sebarang kesan terhadap kekuatan genggaman tangan dan jari mereka.

Background: The repetitive and prolonged exertion of grip and pinch strength are current among carpet weaver tasks. The three objectives of this study were (1) to investigate the relationship between symptoms of musculoskeletal disorders and grip and pinch strength of carpet weavers in carpet weaving workshops in Kerman province, (2) to compare the grip and pinch strength of carpet weavers with normal values, and (3) to identify the relationship between hand postures of carpet weavers during work and force exertion. Methods: In this cross-sectional study, grip strength and key, tip and palmar pinch strengths of 101 female carpet weavers aged 20 to 71 years were measured in Kerman province, in 2018. Nordic Musculoskeletal Questionnaire (Extended version) was also used to evaluate musculoskeletal disorders. Results: Bivariate and multivariate linear regression analyses showed that participants who suffered from musculoskeletal disorders had lower grip and pinch strength than others and this decrease was statistically significant in upper back, wrists/hands, and knees. Moreover, there was a significant difference between grip and three types of pinch strength of carpet weavers and normal values. Furthermore, for both hands, the grip strength in the position recommended by American Society of Hand Therapists was significantly greater than that in the normal position carpet weavers usually adopt. Conclusion: Based on the results, the high prevalence of musculoskeletal disorders has led to a significant decrease in the grip and pinch strength of carpet weavers. Therefore, it is necessary to undertake ergonomic interventions in designing the carpet weaving workstation. [ABSTRACT FROM AUTHOR]

The purpose of the study was to establish clinical norms for adults aged 20-40 year old on grip and three types of pinch strength. A dynamometer was used to measure grip strength and a pinch gauge to measure pinch strength-tip pinch, key pinch and three fingered pinch. A sample of 118 males and 112 females, aged 20-40 was tested using standard positioning and instructions. Results shows a decline in the grip strength as age increases but no such relation was established between pinch strength and age. Dominance showed no difference. Comparison between males and females,it shows males have stronger hand strength than females. [ABSTRACT FROM AUTHOR]

Grip and pinch strength are the most important factors affecting the hand’s performance. This study aimed to evaluate the relationship among maximum aerobic capacity (Vo2max) and ratings of perceived exertion (RPE) with grip and pinch strength and endurance and their impact on these factors. This cross-sectional study was performed among 83 male students and office workers by means of simple random sampling. To assess the Vo2max, RPE, grip and pinch strength and endurance the Step Test, Borg scale, dynamometer and pinch gauge were used, respectively. The findings of the study indicate that there is a direct relationship between the Vo2max with grip strength and endurance, pinch strength and endurance and BMI. On the other hand, there is an indirect relationship between RPE with grip and pinch strength and Vo2max. Moreover, there was no relationship between RPE with grip and pinch endurance. It was also found that there is a direct relationship between the BMI with grip and pinch strength, pinch endurance, and Vo2max. Finally, no relationship was observed between BMI and grip endurance. Moreover, the Vo2max was found to have no influence on the grip and pinch strength and pinch endurance, but it has an influence on the grip endurance. In jobs that require high grip and pinch strength and endurance employed those with high Vo2max so that work-related musculoskeletal disorders (WMSDs) would be prevented.

Objective: To assess recovery of grip strength during the first year post-stroke. Design: Exploratory study on a subsample of patients participating in the Norwegian Constraint-Induced Movement Therapy trial. Subjects: Eleven patients (mean age 59.1 years; 3 women) with mild to moderate stroke were recruited 7–29 days post-stroke. Methods: An electronic dynamometer (Biometrics Ltd, Gwent, UK, 2006) was used to assess maximum grip force in 5 hand positions, rate of force development and sustainability of grip force. Similar assessments were performed to assess pinch strength. The participants were assessed 5 times during a 1-year period. Results: Grip force in the affected hand increased in all handle positions during the 1-year follow-up, mostly during the first 6 months. At 2 and 4 weeks, rate of force development was less than half, and relative sustainability of grip force showed 20–30% greater deficit than for the non-affected hand. The affected hand approached the values of the non-affected hand after 6 months with little further progress until 1-year follow-up. Conclusion: Grip strength in the affected hand improved considerably in the first year post-stroke. Patterns of improvement were similar across tests, i.e. rapid during the first weeks, slower until 6 months, and minimal 6–12 months post-stroke.

• We revealed relation between difficulty in using the arms and mild cognitive impairment (MCI) in coronary artery disease (CAD) patients. • The Disability of the Arm, Shoulder, and Hand (DASH) score was higher in CAD patients with MCI. • The DASH score was independently associated with MCI. • Manual and cognitive function were independently associated with the DASH score. • Manual function and activities using the arms could be targets for intervention. We aimed to examine the relationship between the difficulty of activity using the arms and mild cognitive impairment (MCI), the relationship between the difficulty of activity using the arms and manual function, and cognitive function in patients with coronary artery disease (CAD). We conducted a cross-sectional study of 263 non-dementia patients who met the study criteria from 2328 CAD patients. MCI was estimated with the Japanese version of the Montreal Cognitive Assessment (MoCA-J). The difficulty of activity using the arms was evaluated using the Disability of the Arm, Shoulder, Disability of the Arm, Shoulder and Hand and Hand (DASH) questionnaire. Manual function was evaluated by pinch strength and handgrip strength. Age (odds ratio, 1.10), three-fingered pinch strength (odds ratio, 0.69), and DASH score (odds ratio, 1.03) were independently associated with MCI in the multivariable logistic regression analysis. Hemoglobin (β = −0.15), handgrip strength (β = −0.37), and MoCA-J score (β = −0.15) were independently associated with DASH score (Model 1: p < 0.001, adjusted R 2 = 0.33); hemoglobin (β = −0.17), eGFR (β = −0.14), three-fingered pinch strength (β = −0.25), and MoCA-J score (β = −0.14) were independently associated with DASH score in the multivariate regression analysis (Model 2: p < 0.001, adjusted R 2 = 0.31). The difficulty of activity using the arms was independently associated with manual and cognitive function and MCI in CAD patients. [ABSTRACT FROM AUTHOR]

This study aims to examine tactile sensitivity effects on the pinch force and endurance of elderly people, and propose solutions extending from the statistical outcomes using the theory of inventive problem-solving (TRIZ). Pinch force and endurance time data were collected among 32 subjects aged 55–65 years according to a non-probability sampling method. Each participant received both treatments of increased and decreased tactile sensitivity through an experimental research design. Subjects pinched an experimental apparatus with different tactile sensitivities, and sustained their pinch for as long as possible. The results suggested that a significant difference existed between pinch force from reduced and increased tactile sensitivities, with similar outcomes for endurance. Resolving contradictions from the results led to the partial-action principle, which suggested that elderly people should pinch using less force when they lack the strength to achieve a certain force level, rather than exert a high force in a single attempt. The segmentation and other-way-around principles were also recommended. Su-Field analysis found that harmful effects from pinching can be neutralised using intermediary materials between the fingers and object, such as rubber. The analysis proposed using optical or acoustic fields, where light sensors or buzzers could act as mechanisms to signal users when sufficient force is achieved. These TRIZ-stimulated solutions provide new insights in resolving poor pinch performance caused by degrading tactile sensitivity.

This study aims to examine tactile sensitivity effects on the pinch force and endurance of elderly people, and propose solutions extending from the statistical outcomes using the theory of inventive problem-solving (TRIZ). Pinch force and endurance time data were collected among 32 subjects aged 55–65 years according to a non-probability sampling method. Each participant received both treatments of increased and decreased tactile sensitivity through an experimental research design. Subjects pinched an experimental apparatus with different tactile sensitivities, and sustained their pinch for as long as possible. The results suggested that a significant difference existed between pinch force from reduced and increased tactile sensitivities, with similar outcomes for endurance. Resolving contradictions from the results led to the partial-action principle, which suggested that elderly people should pinch using less force when they lack the strength to achieve a certain force level, rather than exert a high force in a single attempt. The segmentation and other-way-around principles were also recommended. Su-Field analysis found that harmful effects from pinching can be neutralised using intermediary materials between the fingers and object, such as rubber. The analysis proposed using optical or acoustic fields, where light sensors or buzzers could act as mechanisms to signal users when sufficient force is achieved. These TRIZ-stimulated solutions provide new insights in resolving poor pinch performance caused by degrading tactile sensitivity. [ABSTRACT FROM AUTHOR]

Chronic kidney disease (CKD) patients are at increased risk of sarcopenic muscle wasting, with increased mortality risk. Simple screening tests are required to detect sarcopenia to allow for interventional therapies. We wished to compare anthropometric and multifrequency bioimpedance (MFBIA) measurements of arm composition and muscle strength. We measured segmental MFBIA, mid arm upper circumference (MUAC) and triceps skin fold thickness (TSF), hand grip strength (HGS) and pinch strength (PS) in CKD patients attending out-patient review. We reviewed 146 patients; 94 male (64.4%), 93 (63.7%) diabetic, mean age 70.5 ± 15 years, weight 77.6 ± 17.1 kg, with a mean HGS of 25.2 ± 10.4, and PS 5.0 ± 1.9 kg. HGS and PS were correlated (r = 0.63, p < 0.001). Male patients had greater HGS and PS (28.3 ± 10.1 vs 19.7 ± 7.0 kg; and 5.3 ± 2.0 vs 4.3 ± 1.1 kg, p < 0.05) with greater arm muscle (3.2 ± 0.7 vs 2.4 ± 0.7 kg, p < 0.05) and less arm fat (1.8 ± 1.3 vs 2.9 ± 1.8 kg, p < 0.05), whereas there was no difference in anthropometric measurements of mid upper arm muscle or fat area. Whereas both HGS and PS correlated positively with MFBIA arm lean mass (r = 0.55, r = 0.37, p < 0.001) and negatively for arm fat mass (r = −0.4, p < 0.001, r = −0.32, p = 0.001) respectively, there were no correlations with anthropometric derived estimates of upper arm muscle or fat. In CKD patients, segmental MFBIA measurements of the arm, but not those derived from anthropometric measurements demonstrate gender differences and correlate with arm muscle strength, whereas there were no such correlations with anthropometric estimates of upper arm muscle or fat. [ABSTRACT FROM AUTHOR]