骨肌的形状通过机械优势影响关节扭矩
Jun Umehara1,2, Masashi Taniguchi2, Masahide Yagi1,2
1Faculty of Rehabilitation, Kansai Medical University, Hirakata, Japan.
Journal of applied physiology (Bethesda, Md. : 1985)
|April 7, 2025
概括
肌肉形状,而不仅仅是大小,显著影响关节扭矩. 特定的四肢大腿骨形状,如直骨骨曲线和巨大的中枢凸,增强膝盖延伸器扭矩. 这揭示了肌肉形状的形状.
科学领域:
- 生物力学 生物力学
- 骨肌肉生理学 骨肌肉生理学
- 人类解剖学 人类解剖学
背景情况:
- 肌肉体积是已知的关节扭矩力的决定因素.
- 肌肉形状对扭矩生成的独立贡献在很大程度上仍未被探索.
- 了解肌肉形态的功能影响对于生物力学分析至关重要.
研究的目的:
- 为了研究三维肌肉形状是否独立地影响关节扭矩,无论肌肉体积如何.
- 使用统计形状模型量化肌肉形状特征.
- 为了探索特定的四头四腿肌形状和同度膝盖延伸器扭矩之间的关系.
主要方法:
- 从33名健康的年轻成年人的四头四腿肌肉的磁共振图像开发了一个统计形状模型.
- 每个四头四腿骨头的量化形状组件.
- 相关的形状组件与异比的膝盖延伸器扭矩和机械优势参数.
主要成果:
- 腿直骨的中侧曲率 (R2 = 0.60) 和大骨的远端凸起 (R2 = 0.65) 与膝盖延伸器扭矩的增加有关,而这与肌肉体积无关.
- 特定的肌肉形状与动线和动力臂相关,影响机械优势.
- 腿直骨的形状与中间方向的动力线相关联 (r = -0.42);巨大的中间体形状与中间方向的动力线相关联 (ρ = -0.36) 和骨侧旋动量臂 (ρ = 0.45).
结论:
- 三维肌肉形状是关节扭矩力的关键决定因素,影响机械优势.
- 肌肉的形状提供了骨肌肉形态及其力量产生能力之间的关键联系.
- 这项研究为理解肌肉形状在生物力学中的功能意义提供了一个框架.
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