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上肢和下肢肌肉中的力量变化和神经控制差异.
Kherto Ahmed1, Kim J Uyeno1, Anita D Christie1
1Faculty of Health Sciences, School of Kinesiology, Western University, London, Ontario, Canada.
Journal of neurophysiology
|April 11, 2025
概括
神经控制在上肢和下肢肌肉和性别之间存在差异,影响运动单元的发动,但不影响力量控制. 这项研究比较了男性和女性的第一个背内骨 (FDI) 和前 (TA) 肌肉控制.
科学领域:
- 神经科学是一个神经科学.
- 人类运动控制人体运动控制
- 生物力学 生物力学
背景情况:
- 了解运动的神经控制对于康复和性能提升至关重要.
- 以前的研究已经探索了运动控制的肌肉特异性和性别特异性差异,但对不同四肢肌肉的全面比较是有限的.
研究的目的:
- 为了比较第一个背内骨肌 (FDI) 和前肌 (TA) 之间的力变化和运动单元的发射行为.
- 调查在力量生产任务期间这些肌肉的神经控制中的潜在基于性别的差异.
主要方法:
- 十二名健康的男性和十二名健康的女性执行了指指绑架 (FDI) 和脚背屈曲 (TA) 的亚最大力追踪任务.
- 同时记录力输出和电机单元活动 (间隙间隔) 进行.
- 分析的重点是力量变化系数 (CV) 和动力单元间隙间隔 (CVISI) 的CV.
主要成果:
- 力量变化 (CV) 的肌肉相关差异与性别和任务有关.
- 与TA相比,FDI的动力单位变化率 (CVISI) 在FDI中始终更高.
- 运动单元变异性 (CVISI) 仅在TA肌肉中,男性的变异性比女性更大.
结论:
- 神经控制机制似乎在上肢和下肢肌肉 (FDI与TA) 之间以及性别之间存在差异.
- 神经控制中的这些差异是依赖于任务的,并不总是转化为力量控制变异性的差异.
- 这些发现凸显了不同肌肉群和性别的运动单元招募和放电模式的复杂性.
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