Challenges in the diagnosis and treatment of Parkinson’s disease:Parkinson’s disease(PD)is an increasingly prevalent neurodegenerative disease,at first sight primarily characterized by motor symptoms,although non-mo...Challenges in the diagnosis and treatment of Parkinson’s disease:Parkinson’s disease(PD)is an increasingly prevalent neurodegenerative disease,at first sight primarily characterized by motor symptoms,although non-motor symptoms also constitute a major part of the overall phenotype.Clinically,this disease cannot be diagnosed reliably until a large part of the vulnerable dopaminergic neurons has been irretrievably lost,and the disease progresses inexorably.New biological criteria for PD have been proposed recently and might eventually improve early diagnosis,but they require further validation,and their use will initially be restricted to a research environment(Darweesh et al.,2024).展开更多
Introduction:Parkinson’s disease(PD)is the most common neurodegenerative movement disorder.The pathological hallmark is the progressive loss of dopaminergic neurons of the substantia nigra pars compacta,which is acco...Introduction:Parkinson’s disease(PD)is the most common neurodegenerative movement disorder.The pathological hallmark is the progressive loss of dopaminergic neurons of the substantia nigra pars compacta,which is accompanied by widespread alterations in the structu re and function of distributed brain networks.Togethe r,these processes cause a variety of motor symptoms such as bradykinesia,rigidity,tremor,gait disorders,or difficulties in fine motor control(Bange et al.,2022).展开更多
Background:Given the heightened risk of developmental challenges associated with preterm birth,it is crucial to explore interventions that may ameliorate potential adverse outcomes.This study aimed to examine whether ...Background:Given the heightened risk of developmental challenges associated with preterm birth,it is crucial to explore interventions that may ameliorate potential adverse outcomes.This study aimed to examine whether meeting the 24-h movement behavior(24-HMB)guidelines,which include recommendations on physical activity(PA),screen time(ST),and sleep(SL),is related to indicators of cognitive difficulties,internalizing problems(e.g.,depression and anxiety),and externalizing problems(e.g.,difficulties in making friends and arguing)in a sample of preterm youth(children and adolescents born preterm).Methods:In this cross-sectional study,data from 3410 preterm youth(aged 6 to 17 years)were included for data analyses.Multivariable logistic regression was used to investigate associations between meeting the 24-HMB guidelines and the above-mentioned health outcomes,while controlling for sociodemographic and health-related factors.Results:The prevalence of meeting 24-HMB guidelines varied across independent and integrated components of the 24-HMB guidelines.Meeting the ST guideline alone(p<0.05)and integrated guidelines(i.e.,ST+SL and ST+SL+PA)were associated with fewer cognitive difficulties and reduced internalizing and externalizing problems(p<0.05).Specifically,meeting the SL guideline alone and integrated guidelines(i.e.,SL+ST)were associated with lower odds of depression and anxiety(p<0.01).Additionally,meeting independent,and integrated(PA and/or ST)guidelines were associated with less pronounced difficulties in making friends and arguing(p<0.05).Meeting 24-HMB guidelines in an isolated and integrated manner are linked to better cognitive performance and fewer internalizing and externalizing problems in preterm youth.Conclusion:Results suggest that advocating for the implementation of the 24-HMB guidelines may reduce cognitive challenges and behavioral issues,which is of high relevance for improving public health.Future longitudinal studies in preterm youth should investigate how modifying specific 24-HMB behaviors,especially ST,influence cognitive difficulties,internalizing and externalizing problems in this vulnerable population.展开更多
In this paper, GPS observations during 1998 to 1999 at fiducial stations in the Crustal Movement Observation Network of China (CMONOC) and GPS observation data processing with Bernese Software are briefly introduced. ...In this paper, GPS observations during 1998 to 1999 at fiducial stations in the Crustal Movement Observation Network of China (CMONOC) and GPS observation data processing with Bernese Software are briefly introduced. The processed results of crustal movement in the network during the period from early September 1998 to early July 1999, including the displacements at each fiducial station and strains in different part of the network, are discussed in detail. During the above mentioned period of observations, the eastern part of China was relatively stable. In contrast, the southwest part of China moved northwards about 17 mm with a dominant compression in NNE; the northwestern part of China moved northwestwards about 11 mm; and the Yunnan area moved southwards about 14 mm. The North-South seismic belt in the middle part of China is a belt of strong shear deformation. The maximum principal strain in the network is 2.9×10-8. The observation result shows that the northward push by the Indian Plate has still played the dominant role in the crystal movement in China.展开更多
Numerous high performance athletes experience further damage or recurrent injuries even after successful rehabilitation. This is often caused by an insufficient movement quality, which has been very rarely assessed by...Numerous high performance athletes experience further damage or recurrent injuries even after successful rehabilitation. This is often caused by an insufficient movement quality, which has been very rarely assessed by test protocols which determine the point of reintegration into high performance sports (Return-to-Play, RTP). In order to assess the movement quality both objective and subjective test protocols exist. Objective methods like 3D-movement analysis are viewed as international gold standard, but are not the most practicable solutions for daily training routine. This study aims at reviewing the available literature on reliability and validity of existing subjective test protocols. Further their use within high-performance sports is evaluated. Up to now subjective methods fail to match sufficient validity. However some practical approaches for assessment of movement quality after injury are known. Based on selected criteria first recommendations for the use of different subjective screening test methods are given. In summary further research focusing on the validity of subjective tests is needed. The subjective testing methods should be used in combination with additional tests (e.g. strength testing) in order to identify other risk factors. Recurrent pre-injury screenings on movement quality should be carried out to enhance injury prevention.展开更多
Background:The Canadian 24-hour movement behavior(24-HMB)guidelines suggest that a limited amount of screen time use,an adequate level of physical activity(PA),and sufficient sleep duration are beneficial for ensuring...Background:The Canadian 24-hour movement behavior(24-HMB)guidelines suggest that a limited amount of screen time use,an adequate level of physical activity(PA),and sufficient sleep duration are beneficial for ensuring and optimizing the health and quality of life(QoL)of children and adolescents.However,this topic has yet to be examined for children and adolescents with autism spectrum disorder(ASD)specifically.The aim of this cross-sectional observational study was to examine the associations between meeting 24-HMB guidelines and several QoLrelated indicators among a national sample of American children and adolescents with ASD.Methods:Data were taken from the 2020 U.S.National Survey of Children’s Health dataset.Participants(n=956)aged 617 years and currently diagnosed with ASD were included.The exposure of interest was adherence to the 24-HMB guidelines.Outcomes were QoL indicators,including learning interest/curiosity,repeating grades,adaptive ability,victimization by bullying,and behavioral problems.Categorical variables were described with unweighted sample counts and weighted percentages.Age,sex,race,preterm birth status,medication,behavioral treatment,household poverty level,and the educational level of the primary caregivers were included as covariates.Odds ratio(OR)and 95%confidence interval(95%CI)were used to present the strength of association between adherence to 24-HMB guidelines and QoL-related indicators.Results:Overall,452 participants(45.34%)met 1 of the 3 recommendations,216(22.65%)met 2 recommendations,whereas only 39 participants(5.04%)met all 3 recommendations.Compared with meeting none of the recommendations,meeting both sleep duration and PA recommendations(OR=3.92,95%CI:1.639.48,p<0.001)or all 3 recommendations(OR=2.11,95%CI:1.034.35,p=0.04)was associated with higher odds of showing learning interest/curiosity.Meeting both screen time and PA recommendations(OR=0.15,95%CI:0.040.61,p<0.05)or both sleep duration and PA recommendations(OR=0.24,95%CI:0.070.87,p<0.05)was associated with lower odds of repeating any grades.With respect to adaptive ability,participants who met only the PA recommendation of the 24-HMB were less likely to have difficulties dressing or bathing(OR=0.11,95%CI:0.020.66,p<0.05)than those who did not.For participants who met all 3 recommendations(OR=0.38,95%CI:0.150.99,p=0.05),the odds of being victimized by bullying was lower.Participants who adhered to both sleep duration and PA recommendations were less likely to present with severe behavioral problems(OR=0.17,95%CI:0.040.71,p<0.05)than those who did not meet those guidelines.Conclusion:Significant associations were found between adhering to 24-HMB guidelines and selected QoL indicators.These findings highlight the importance of maintaining a healthy lifestyle as a key factor in promoting and preserving the QoL of children with ASD.展开更多
Measuring intrinsic hip external rotator strength (ER) without compensatory pelvic motion and activation of the sartorius is important for preventing or rehabilitating lower extremity injuries. However, the optimal me...Measuring intrinsic hip external rotator strength (ER) without compensatory pelvic motion and activation of the sartorius is important for preventing or rehabilitating lower extremity injuries. However, the optimal method for measuring intrinsic hip ER muscle strength while minimizing compensatory pelvic motions and activation of the sartorius is unclear. The purpose of this study is to compare measurements of hip ER strength, compensatory pelvic motion, and sartorius activation in the sitting, prone, and sidelying positions. Thirty-one healthy subjects (16 males and 15 females) were recruited for this study. Hip ER strength, pelvic kinematics, and sartorius muscle activation were measured during maximal isometric contraction of the hip ER in the sitting, prone, and sidelying positions. Hip ER strength was measured using a load-cell-type strength-measurement sensor. Pelvic kinematics was measured using an electromagnetic motion-tracking sensor. Electromyography was used to measure sartorius muscle activity. Data were analyzed using one-way repeated-measures analysis of variance. The result showed that hip ER strength and sartorius muscle activation were significantly lower in the sidelying compared with the sitting and prone positions (p < 0.01). Pelvic anteroposterior tilting was significantly greater in the sitting compared with the prone and sidelying positions (p < 0.01). Pelvic rotation differed significantly among positions (p < 0.01). Pelvic lateral tilting was significantly greater in the prone compared with the sitting position (p < 0.017). Compensatory pelvic motion and sartorius muscle activation were lower when hip ER strength measurements were made in the sidelying position. Therefore, the sidelying position is effective for measuring selective intrinsic hip ER strength.展开更多
Background:Stretching has wide appeal,but there seems to exist some mismatch between its purported applications and what the evidence shows.There is compelling evidence for some stretching applications,but for others,...Background:Stretching has wide appeal,but there seems to exist some mismatch between its purported applications and what the evidence shows.There is compelling evidence for some stretching applications,but for others,the evidence seems heterogeneous or unsupportive.The discrepancies even affect some systematic reviews,possibly due to heterogeneous eligibility criteria and search strategies.This consensus paper seeks to unify the divergent findings on stretching and its implications for both athletic performance and clinical practices by delivering evidence-based recommendations.Methods:A panel of 20 experts with a blend of practical experience and scholarly knowledge was assembled.The panel meticulously reviewed existing systematic reviews,defined key terminologies(e.g.,consensus definitions for different stretching modes),and crafted guidelines using a Delphi consensus approach(minimum required agreement:80%).The analysis focused on 8 topics,including stretching's acute and chronic(long-term)effects on range of motion,strength performance,muscle hypertrophy,stiffness,injury prevention,muscle recovery,posture correction,and cardiovascular health.Results:There was consensus that chronic and acute stretching(a)improves range of motion(although alternatives exist)and(b)reduces muscle stiffness(which may not always be desirable);the panel also agreed that chronic stretching(c)may promote vascular health,but more research is warranted.In contrast,consensus was found that stretch training does not(a)contribute substantively to muscle growth,(b)serve as an allencompassing injury prevention strategy,(c)improve posture,or(d)acutely enhance post-exercise recovery.Conclusion:These recommendations provide guidance for athletes and practitioners,highlighting research gaps that should be addressed to more comprehensively understand the full scope of stretching effects.展开更多
目的探究单腿站立姿势控制与踝跖屈肌力稳定性的相关性,为提升人体姿势控制能力提供新的理论依据。方法随机选取20名健康男性大学生作为实验对象。采用iBalance平衡测试仪与训练系统测试单腿站立的足底压力中心(center of pressure,COP...目的探究单腿站立姿势控制与踝跖屈肌力稳定性的相关性,为提升人体姿势控制能力提供新的理论依据。方法随机选取20名健康男性大学生作为实验对象。采用iBalance平衡测试仪与训练系统测试单腿站立的足底压力中心(center of pressure,COP)轨迹数据;采用CON-TREX MJ多关节等速测试与训练系统测试踝跖屈肌收缩期间的力矩振幅数据。采用单因素重复测量方差分析组间踝跖屈肌力矩振幅的标准偏差数据;采用Pearson相关系数进行相关性研究。结果踝跖屈肌执行的肌力稳定任务强度越大,力矩振幅的标准偏差越大;无干扰单腿站立下,C90面积与10%踝跖屈肌最大任意收缩(maximum voluntary contraction,MVC)力矩振幅的变异系数(coefficient of variation,CV)(r=0.761,P<0.05)呈正相关。干扰视觉单腿站立下,C90面积与30%踝跖屈肌MVC力矩振幅CV(r=0.632,P<0.05)呈正相关。干扰本体感觉单腿站立下,C90面积与20%踝跖屈肌MVC力矩振幅CV(r=0.583,P<0.05)呈正相关。结论随着踝跖屈肌执行的肌力稳定任务难度加大,肌力稳定性降低;踝跖屈肌力稳定性与单腿站立姿势控制能力存在正相关关系。相较于无干扰情况,在视觉、本体感觉干扰下,额外的信息传入减少或受到干扰,人体维持身体平衡的难度加大,踝跖屈肌需要更高发力模式下的肌力稳定性来参与人体单腿站立的姿势控制。展开更多
文摘Challenges in the diagnosis and treatment of Parkinson’s disease:Parkinson’s disease(PD)is an increasingly prevalent neurodegenerative disease,at first sight primarily characterized by motor symptoms,although non-motor symptoms also constitute a major part of the overall phenotype.Clinically,this disease cannot be diagnosed reliably until a large part of the vulnerable dopaminergic neurons has been irretrievably lost,and the disease progresses inexorably.New biological criteria for PD have been proposed recently and might eventually improve early diagnosis,but they require further validation,and their use will initially be restricted to a research environment(Darweesh et al.,2024).
文摘Introduction:Parkinson’s disease(PD)is the most common neurodegenerative movement disorder.The pathological hallmark is the progressive loss of dopaminergic neurons of the substantia nigra pars compacta,which is accompanied by widespread alterations in the structu re and function of distributed brain networks.Togethe r,these processes cause a variety of motor symptoms such as bradykinesia,rigidity,tremor,gait disorders,or difficulties in fine motor control(Bange et al.,2022).
基金supported by the Shenzhen Educational Research Funding(Grant No.zdzb2014)the Shenzhen Science and Technology Innovation Commission(Grant No.202307313000096)+3 种基金the Social Science Foundation from China’s Ministry of Education(Grant No.23YJA880093)a Post-Doctoral Fellowship(Grant No.2022M711174)the National Center for Mental Health(Grant No.Z014)a Research Excellence Scholarship of Shenzhen University(Grant No.ZYZD2305).
文摘Background:Given the heightened risk of developmental challenges associated with preterm birth,it is crucial to explore interventions that may ameliorate potential adverse outcomes.This study aimed to examine whether meeting the 24-h movement behavior(24-HMB)guidelines,which include recommendations on physical activity(PA),screen time(ST),and sleep(SL),is related to indicators of cognitive difficulties,internalizing problems(e.g.,depression and anxiety),and externalizing problems(e.g.,difficulties in making friends and arguing)in a sample of preterm youth(children and adolescents born preterm).Methods:In this cross-sectional study,data from 3410 preterm youth(aged 6 to 17 years)were included for data analyses.Multivariable logistic regression was used to investigate associations between meeting the 24-HMB guidelines and the above-mentioned health outcomes,while controlling for sociodemographic and health-related factors.Results:The prevalence of meeting 24-HMB guidelines varied across independent and integrated components of the 24-HMB guidelines.Meeting the ST guideline alone(p<0.05)and integrated guidelines(i.e.,ST+SL and ST+SL+PA)were associated with fewer cognitive difficulties and reduced internalizing and externalizing problems(p<0.05).Specifically,meeting the SL guideline alone and integrated guidelines(i.e.,SL+ST)were associated with lower odds of depression and anxiety(p<0.01).Additionally,meeting independent,and integrated(PA and/or ST)guidelines were associated with less pronounced difficulties in making friends and arguing(p<0.05).Meeting 24-HMB guidelines in an isolated and integrated manner are linked to better cognitive performance and fewer internalizing and externalizing problems in preterm youth.Conclusion:Results suggest that advocating for the implementation of the 24-HMB guidelines may reduce cognitive challenges and behavioral issues,which is of high relevance for improving public health.Future longitudinal studies in preterm youth should investigate how modifying specific 24-HMB behaviors,especially ST,influence cognitive difficulties,internalizing and externalizing problems in this vulnerable population.
基金National Development and Programming Project for Key Basic Researches (95-13-03-07).
文摘In this paper, GPS observations during 1998 to 1999 at fiducial stations in the Crustal Movement Observation Network of China (CMONOC) and GPS observation data processing with Bernese Software are briefly introduced. The processed results of crustal movement in the network during the period from early September 1998 to early July 1999, including the displacements at each fiducial station and strains in different part of the network, are discussed in detail. During the above mentioned period of observations, the eastern part of China was relatively stable. In contrast, the southwest part of China moved northwards about 17 mm with a dominant compression in NNE; the northwestern part of China moved northwestwards about 11 mm; and the Yunnan area moved southwards about 14 mm. The North-South seismic belt in the middle part of China is a belt of strong shear deformation. The maximum principal strain in the network is 2.9×10-8. The observation result shows that the northward push by the Indian Plate has still played the dominant role in the crystal movement in China.
文摘Numerous high performance athletes experience further damage or recurrent injuries even after successful rehabilitation. This is often caused by an insufficient movement quality, which has been very rarely assessed by test protocols which determine the point of reintegration into high performance sports (Return-to-Play, RTP). In order to assess the movement quality both objective and subjective test protocols exist. Objective methods like 3D-movement analysis are viewed as international gold standard, but are not the most practicable solutions for daily training routine. This study aims at reviewing the available literature on reliability and validity of existing subjective test protocols. Further their use within high-performance sports is evaluated. Up to now subjective methods fail to match sufficient validity. However some practical approaches for assessment of movement quality after injury are known. Based on selected criteria first recommendations for the use of different subjective screening test methods are given. In summary further research focusing on the validity of subjective tests is needed. The subjective testing methods should be used in combination with additional tests (e.g. strength testing) in order to identify other risk factors. Recurrent pre-injury screenings on movement quality should be carried out to enhance injury prevention.
基金supported by Start-up Research Grant of Shenzhen University(20200807163056003)Start-Up Research Grant(PeacockPlan:20191105534C).
文摘Background:The Canadian 24-hour movement behavior(24-HMB)guidelines suggest that a limited amount of screen time use,an adequate level of physical activity(PA),and sufficient sleep duration are beneficial for ensuring and optimizing the health and quality of life(QoL)of children and adolescents.However,this topic has yet to be examined for children and adolescents with autism spectrum disorder(ASD)specifically.The aim of this cross-sectional observational study was to examine the associations between meeting 24-HMB guidelines and several QoLrelated indicators among a national sample of American children and adolescents with ASD.Methods:Data were taken from the 2020 U.S.National Survey of Children’s Health dataset.Participants(n=956)aged 617 years and currently diagnosed with ASD were included.The exposure of interest was adherence to the 24-HMB guidelines.Outcomes were QoL indicators,including learning interest/curiosity,repeating grades,adaptive ability,victimization by bullying,and behavioral problems.Categorical variables were described with unweighted sample counts and weighted percentages.Age,sex,race,preterm birth status,medication,behavioral treatment,household poverty level,and the educational level of the primary caregivers were included as covariates.Odds ratio(OR)and 95%confidence interval(95%CI)were used to present the strength of association between adherence to 24-HMB guidelines and QoL-related indicators.Results:Overall,452 participants(45.34%)met 1 of the 3 recommendations,216(22.65%)met 2 recommendations,whereas only 39 participants(5.04%)met all 3 recommendations.Compared with meeting none of the recommendations,meeting both sleep duration and PA recommendations(OR=3.92,95%CI:1.639.48,p<0.001)or all 3 recommendations(OR=2.11,95%CI:1.034.35,p=0.04)was associated with higher odds of showing learning interest/curiosity.Meeting both screen time and PA recommendations(OR=0.15,95%CI:0.040.61,p<0.05)or both sleep duration and PA recommendations(OR=0.24,95%CI:0.070.87,p<0.05)was associated with lower odds of repeating any grades.With respect to adaptive ability,participants who met only the PA recommendation of the 24-HMB were less likely to have difficulties dressing or bathing(OR=0.11,95%CI:0.020.66,p<0.05)than those who did not.For participants who met all 3 recommendations(OR=0.38,95%CI:0.150.99,p=0.05),the odds of being victimized by bullying was lower.Participants who adhered to both sleep duration and PA recommendations were less likely to present with severe behavioral problems(OR=0.17,95%CI:0.040.71,p<0.05)than those who did not meet those guidelines.Conclusion:Significant associations were found between adhering to 24-HMB guidelines and selected QoL indicators.These findings highlight the importance of maintaining a healthy lifestyle as a key factor in promoting and preserving the QoL of children with ASD.
文摘Measuring intrinsic hip external rotator strength (ER) without compensatory pelvic motion and activation of the sartorius is important for preventing or rehabilitating lower extremity injuries. However, the optimal method for measuring intrinsic hip ER muscle strength while minimizing compensatory pelvic motions and activation of the sartorius is unclear. The purpose of this study is to compare measurements of hip ER strength, compensatory pelvic motion, and sartorius activation in the sitting, prone, and sidelying positions. Thirty-one healthy subjects (16 males and 15 females) were recruited for this study. Hip ER strength, pelvic kinematics, and sartorius muscle activation were measured during maximal isometric contraction of the hip ER in the sitting, prone, and sidelying positions. Hip ER strength was measured using a load-cell-type strength-measurement sensor. Pelvic kinematics was measured using an electromagnetic motion-tracking sensor. Electromyography was used to measure sartorius muscle activity. Data were analyzed using one-way repeated-measures analysis of variance. The result showed that hip ER strength and sartorius muscle activation were significantly lower in the sidelying compared with the sitting and prone positions (p < 0.01). Pelvic anteroposterior tilting was significantly greater in the sitting compared with the prone and sidelying positions (p < 0.01). Pelvic rotation differed significantly among positions (p < 0.01). Pelvic lateral tilting was significantly greater in the prone compared with the sitting position (p < 0.017). Compensatory pelvic motion and sartorius muscle activation were lower when hip ER strength measurements were made in the sidelying position. Therefore, the sidelying position is effective for measuring selective intrinsic hip ER strength.
文摘Background:Stretching has wide appeal,but there seems to exist some mismatch between its purported applications and what the evidence shows.There is compelling evidence for some stretching applications,but for others,the evidence seems heterogeneous or unsupportive.The discrepancies even affect some systematic reviews,possibly due to heterogeneous eligibility criteria and search strategies.This consensus paper seeks to unify the divergent findings on stretching and its implications for both athletic performance and clinical practices by delivering evidence-based recommendations.Methods:A panel of 20 experts with a blend of practical experience and scholarly knowledge was assembled.The panel meticulously reviewed existing systematic reviews,defined key terminologies(e.g.,consensus definitions for different stretching modes),and crafted guidelines using a Delphi consensus approach(minimum required agreement:80%).The analysis focused on 8 topics,including stretching's acute and chronic(long-term)effects on range of motion,strength performance,muscle hypertrophy,stiffness,injury prevention,muscle recovery,posture correction,and cardiovascular health.Results:There was consensus that chronic and acute stretching(a)improves range of motion(although alternatives exist)and(b)reduces muscle stiffness(which may not always be desirable);the panel also agreed that chronic stretching(c)may promote vascular health,but more research is warranted.In contrast,consensus was found that stretch training does not(a)contribute substantively to muscle growth,(b)serve as an allencompassing injury prevention strategy,(c)improve posture,or(d)acutely enhance post-exercise recovery.Conclusion:These recommendations provide guidance for athletes and practitioners,highlighting research gaps that should be addressed to more comprehensively understand the full scope of stretching effects.
文摘目的探究单腿站立姿势控制与踝跖屈肌力稳定性的相关性,为提升人体姿势控制能力提供新的理论依据。方法随机选取20名健康男性大学生作为实验对象。采用iBalance平衡测试仪与训练系统测试单腿站立的足底压力中心(center of pressure,COP)轨迹数据;采用CON-TREX MJ多关节等速测试与训练系统测试踝跖屈肌收缩期间的力矩振幅数据。采用单因素重复测量方差分析组间踝跖屈肌力矩振幅的标准偏差数据;采用Pearson相关系数进行相关性研究。结果踝跖屈肌执行的肌力稳定任务强度越大,力矩振幅的标准偏差越大;无干扰单腿站立下,C90面积与10%踝跖屈肌最大任意收缩(maximum voluntary contraction,MVC)力矩振幅的变异系数(coefficient of variation,CV)(r=0.761,P<0.05)呈正相关。干扰视觉单腿站立下,C90面积与30%踝跖屈肌MVC力矩振幅CV(r=0.632,P<0.05)呈正相关。干扰本体感觉单腿站立下,C90面积与20%踝跖屈肌MVC力矩振幅CV(r=0.583,P<0.05)呈正相关。结论随着踝跖屈肌执行的肌力稳定任务难度加大,肌力稳定性降低;踝跖屈肌力稳定性与单腿站立姿势控制能力存在正相关关系。相较于无干扰情况,在视觉、本体感觉干扰下,额外的信息传入减少或受到干扰,人体维持身体平衡的难度加大,踝跖屈肌需要更高发力模式下的肌力稳定性来参与人体单腿站立的姿势控制。
