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手腕姿势和稳定对精确握力产生和肌肉激活模式的影响
Werner L Popp1,2, Lea Richner1,2, Olivier Lambercy1
1Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland.
Journal of neurophysiology
|August 2, 2023
概括
保持手腕姿势显著影响手指握力. 外部手腕稳定增加了20%的精确握力,突出了手腕和手指控制之间的联系,从而改善了手的功能.
科学领域:
- 神经科学是一个神经科学.
- 生物力学 生物力学
- 人类运动控制人体运动控制
背景情况:
- 前臂肌肉为手指运动提供动力,优化运动范围并减少手指惯性.
- 多关节肌的布置创造了手腕和手指控制之间的复杂相互作用.
- 触动手腕会影响手指的感觉运动控制,反之亦然.
研究的目的:
- 系统地研究等比手腕和指数控制之间的相互作用.
- 为了检查保持特定的手腕姿势如何影响精确的握力.
- 为了确定外部手腕稳定对精确握力的效果的影响.
主要方法:
- 15名健康成年人在11个手腕曲/伸展角度完成了最高精度的握力任务.
- 测试了两个条件:自我稳定的手腕姿势和机器人稳定的手腕姿势.
- 记录了最大精度的握力和肌肉激活模式.
主要成果:
- 手腕姿势显著影响最大精确握力 (P < 0.001).
- 最大的握力是在手腕从中立伸出30°时实现的.
- 外部手腕稳定增加了20%的精确握力,并放大了肌肉激活模式.
结论:
- 同时的手腕和手指控制要求会影响对比指的任务性能.
- 外部手腕稳定可以通过增加肌肉激活来增强精确握力.
- 研究结果表明,对于手指软弱的个体,如中风幸存者,有潜在的临床应用.
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