人类腿部肌肉的结构性质和身体大小之间的比例关系
Jongsang Son1, Samuel R Ward2,3, Richard L Lieber4,5,6,7
1Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA.
The Journal of experimental biology
|February 15, 2024
概括
随着身体大小的增加,人类骨肌肉优先考虑力量而不是游览. 肌肉质量比同位素更大,而纤维长度与身体质量比同位素更小.
科学领域:
- 生物力学 生物力学
- 人类解剖学 人类解剖学
- 骨肌肉生理学 骨肌肉生理学
背景情况:
- 骨肌的结构,包括质量,纤维长度和生理横截面积 (PCSA),决定了力量的产生和外出.
- 跨物种研究表明,肌肉质量尺度与哺乳动物的身体质量相比,具有积极的二元测量,纤维长度尺度与二元测量.
- 之前的研究缺乏关于人类肌肉架构缩放的详细的物种内研究.
研究的目的:
- 量化人体肌肉建筑性质和身体尺寸之间的缩放关系.
- 研究人类下肢肌肉结构如何随着体重和身高的变化而变化.
- 为了比较人类肌肉缩放模式与已建立的哺乳动物跨种类缩放趋势.
主要方法:
- 编制了来自34个人类下肢的896个肌肉的数据集 (18名女性,16名男性).
- 包括各种身高和群体的个人,代表了美国人口的很大一部分.
- 分析了36-103岁的个体的数据.
主要成果:
- 人类肌肉质量尺度的体质量为1.3,超过异面尺度 (1.0的指数).
- 人类肌肉纤维长度尺度与体质相对负的全度量 (系数为0.1),低于同度尺度 (系数为0.33).
- 这些发现表明,人类肌肉架构中偏离了对称缩放原理.
结论:
- 随着身体大小的增加,人类的骨肌肉优先考虑力生产 (通过增加质量和PCSA) 而不是游览 (通过减少纤维长度).
- 这种建筑设计对理解人类肌肉功能和开发准确的生物机械模型有影响.
- 这项研究突出了人类下肢肌肉中独特的物种内部缩放模式.
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