有跌倒史老年人坐立运动过程中的肌肉协同分析
Muscle synergy analysis during the sit-to-stand movement in elderly individuals with a history of falling
刘瑞平 1钱蕾 2刘燕燕 3万心竹 2陈春艳 2王镱凝 2于宛琪 2欧阳钧2
作者信息
- 1. 中山大学深圳校区医学院解剖学教研室,深圳 528406;南方医科大学基础医学院人体解剖学国家重点学科,广东省医学生物力学重点实验室,广东省医学3D打印应用转化工程技术研究中心,国家级医学形态学虚拟仿真实验教学中心(南方医科大学),广州 510515
- 2. 南方医科大学基础医学院人体解剖学国家重点学科,广东省医学生物力学重点实验室,广东省医学3D打印应用转化工程技术研究中心,国家级医学形态学虚拟仿真实验教学中心(南方医科大学),广州 510515
- 3. 南方医科大学基础医学院人体解剖学国家重点学科,广东省医学生物力学重点实验室,广东省医学3D打印应用转化工程技术研究中心,国家级医学形态学虚拟仿真实验教学中心(南方医科大学),广州 510515;南方医科大学南方医院康复医学科,广州 510515
- 折叠
摘要
目的 探讨有跌倒史的老年人坐立运动中肌肉募集机制是否发生变化.方法 招募17名健康年轻人、17名健康老年人及9名有跌倒史的老年人,采集右下肢16块肌肉的表面肌电信号(sEMG)和足底压力中心(COP)轨迹,使用Falls Efficacy Scale-International(FES-I)评估跌倒风险,通过非负矩阵分解(NNMF)提取肌肉协同.结果 3组在肌肉协同数量上无显著差异.有跌倒史老年人坐立运动初期,提前激活胭绳肌和踝关节跖屈肌,在运动的后期,这种提前激活转变为额外的肌肉活动,与健康组形成对比.此外,COP偏移量和FES-I评分显著增加,指示运动稳定性不足.结论 坐立运动中有跌倒史老年人胭绳肌和踝关节跖屈肌的异常激活可能影响下肢稳定和肌肉募集策略的改变.
Abstract
Objective To explore the change of muscle recruitment mechanisms during sit-to-stand(STS)movements in elderly individuals with a history of falls.Methods A total of 17 healthy young adults,17 healthy elderly adults,and 9 elderly individuals with a history of falls were recruited.Surface electromyography(sEMG)signals and the trajectory of the center of pressure(COP)from 16 muscles of the right lower limb were collected.Falls Efficacy Scale-International(FES-I)was used to assess fall risk,and muscle synergies were extracted by non-negative matrix factorization(NNMF).Results There was no significant difference in the number of muscle synergies among the three groups.In the elderly individuals with a history of falls,early activation of the hamstring and ankle plantar flexors at the beginning of sit-to-stand movement was transformed into additional muscle activity at the later stage of movement,in contrast to the healthy group.Furthermore,COP offsets and FES-I scores were significantly increased,indicating a lack of movement stability.Conclusions Abnormal activation of hamstrings and ankle dorsiflexion in elderly individuals with a history of falls during STS movements may affect lower limb stability and changes in muscle recruitment strategies.
关键词
跌倒/坐立运动/肌肉协同/表面肌电Key words
Falls/Sit-to-stand exercise/Muscle synergy/Surface electromyography引用本文复制引用
基金项目
国家自然科学基金(32101054)
广东省自然科学基金(2022A1515011681)
广东省自然科学基金(2021A1515010877)
广州市基础与应用基础研究项目(SL2023A04J01973)
出版年
2024
NETL
NSTL
万方数据