一个电肌图学研究比较肌肉功能在前臂的supination和pronation期间
Suresh Kondi1, Thivagar Murugesan2, Neil Postans3
1Trauma and Orthopedics, Salford Royal Hospital NHS Trust, Salford, GBR.
Cureus
|February 12, 2026
概括
前臂肌肉,如和四角肌肉,在低扭矩时会激活,而双臂肌肉和三角肌肉则更多地参与增加扭矩需求. 这种层次的招聘优化了效率和稳定性.
科学领域:
- 生物力学 生物力学
- 人类运动科学科学 人类运动科学
- 神经康复疗法 神经康复疗法
背景情况:
- 前臂的俯卧和俯卧对于日常活动至关重要.
- 在不同负载下前臂旋转期间肌肉激活模式尚未完全理解.
- 这种知识差距影响了康复,手术和假肢设计.
研究的目的:
- 量化和比较前臂旋转肌肉的电肌图 (EMG) 活动.
- 分析肌肉招募策略在异位方位的pronation和supination在增加扭矩负荷下.
主要方法:
- 在四个健康人群中,同时进行表面和细线EMG记录,并进行运动捕捉.
- 同位数前臂旋转任务,并逐渐增加扭矩阻力.
- 在过和规范化后使用根平均平方值进行EMG信号分析.
主要成果:
- 在 supination 中,supinator 的初始激活率高于 biceps brachii 的初始激活率.
- 双臂骨的激活比例比具有更高扭矩的俯卧器增加了更多.
- 在较低的pronation扭矩时,pronator quadratus更活跃;在较高的扭矩时,pronator teres更多地增加.
- 多关节肌肉被逐渐招募,在两个运动中增加扭矩需求.
结论:
- 排骨和排骨四角是用于低扭矩前臂旋转的主要肌肉.
- 双臂臂和前体变得更为主导,随着扭矩需求的增加.
- 观察到的层次性招募优化了机械效率和关节稳定性,在康复和假肢方面有潜在的临床应用.
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