肌肉特异的神经调制在双关节半肌和双腿肌在异比扭矩生成期间
Keisuke Kubota1,2, Taku Miyazawa2,3, Keisuke Hirata2,4
1Research and Development Center, Saitama Prefectural University, Koshigaya, Saitama, Japan.
Journal of neurophysiology
|December 18, 2025
概括
半肌和双腿长头肌在运动过程中有不同的偏好方向. 神经控制,不仅仅是解剖学,影响肌肉活动,特别是在半.
科学领域:
- 生物力学 生物力学
- 神经科学是一个神经科学.
- 人类运动科学科学 人类运动科学
背景情况:
- 了解肌肉偏好的方向 (PDs) 对于分析多关节运动至关重要.
- 半 (ST) 和双腿长头 (BF) 是关键的腿筋肌肉,具有潜在的不同的功能作用.
- 研究解剖学和神经因素在确定肌肉PD的相互作用是必不可少的.
研究的目的:
- 为了确定ST和BF肌肉是否表现出系统不同的PDs.
- 评估这些PDs背后的生物机械和神经机制.
- 通过实验推导的PD与优化和机械模型的预测进行比较.
主要方法:
- 21名健康的成年人在16个角平面方向上执行了对称扭矩任务.
- 表面电肌图 (EMG) 记录了下肢六个肌肉的活动.
- 使用逆动力学估计关节扭矩;肌肉PDs通过EMG与扭矩的线性回归得出.
主要成果:
- 实验确定的PDs在ST和BF之间有显著差异 (P < 0.001).
- STPDs与基于优化的预测比仅基于机械的预测达成更高的协议 (P = 0.0007).
- BF PDs与优化和机械模型 (P = 0.3096) 显示了可比的一致性,表明了高的个人间变异性.
结论:
- 肌肉特异的神经调制对定向调有显著的贡献,特别是在ST中.
- 这些发现强调了整合生物机械和神经因素的必要性,以理解多关节任务中的肌肉活动组织.
- 中枢神经系统有选择地调整肌肉活动,平衡解剖学约束与特定任务的控制.
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