肌肉的长度会影响肩部的活跃关节位置感,但调节收缩不会影响
David Alan Phillips1, Bethany Burr2
1Program in Kinesiology, College of Health, Oregon State University-Cascades, 1500 SW Chandler Ave Bend, Bend, OR, 97702 OR, USA. David.phillips@osucascades.edu.
Experimental brain research
|April 14, 2025
概括
肩关节位置感应 (JPS) 的准确性在更高的升高角度下得到改善. 肌肉长度和轴心灵敏度受到对手肌肉活动的影响,显著影响JPS,特别是在主动重新定位任务期间.
科学领域:
- 生物力学 生物力学
- 神经科学是一个神经科学.
- 运动学 运动学
背景情况:
- 积极的肩膀关节位置感应 (JPS) 显示了取决于角度的准确性,在较高的胸部升高角度表现更好.
- 在积极的JPS测试中,肩延伸肌肉被动地延长,可能会改变肌肉的灵敏度,并导致与角度相关的重新定位错误.
研究的目的:
- 为了研究低水平的对手肌肉收缩与全范围运动暴露对活动肩部JPS的影响.
- 为了确定由于对手肌肉活动而改变的肌肉敏感性是否会影响跨不同肩部升高角度的JPS准确性.
主要方法:
- 十五名参与者在30°,60°和90°的肩部高度进行了积极角度复制的JPS协议.
- 测试了三个条件:标准的JPS,试验之间的对手收缩 (aCON) 和试验之间的全范围运动 (fROM) 暴露.
- 分析了重新定位错误,以寻找条件和角度之间的显著相互作用.
主要成果:
- 观察到条件和角度之间的显著相互作用 (p = 0.002).
- 在标准条件和aCON条件下,JPS误差在较高的高度下降 (p < 0.05).
- 这种取决于角度的改进在fROM条件中不存在,在各角度都有一致的误差.
结论:
- 对抗性肌肉长度的变化和由此产生的肌肉松是影响肩膀JPS的重要因素.
- 这些发现突出了肌肉动态和自身感知反在活跃运动期间精确的关节位置感觉中的作用.
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