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Tao Liu¹, Abdul Aziz Hulleck², Marwan El-Rich³

¹Faculty of Kinesiology, Human Performance Lab, University of Calgary, Alberta, Canada.

Computers in biology and medicine

|August 23, 2023

概括

在肌肉骨模型中,准确的脊柱负荷预测取决于精确的身体部分参数. 一种基于身体形状的新方法揭示了在使用常数百分比基调量时,压力力中的潜在不准确性,特别是对于超重个体.

科学领域:

生物力学生物力学
肌肉骨系统的建模
人体细分参数参数人体细分参数

背景情况:

特定于个体的肌肉骨模型需要准确的体段参数来可靠地预测脊柱负荷.
当前的模型经常使用基于常数百分比 (CPB) 的分段质量的缩放,这忽略了个体间的变化.
这种限制可能会影响上肢肌肉骨模型的预测能力.

研究的目的:

评估对不同体质量缩放方法对特定对象的上肢肌肉骨模型预测的敏感性.
为了比较基于常数百分比 (CPB) 的方法与新开发的基于身体形状 (BSB) 的方法.
评估这些方法对各种姿势和身体质量指数预测的肌肉和圆盘力量的影响.

主要方法:

用CPB和BSB缩放方法计算了6名男性受试者的上半身细分质量和质量中心 (CoM).
利用经过验证的肌肉骨模型来预测直立和曲姿势中的肌肉和圆盘力量.
在受试者和姿势之间,两种缩放方法之间的量化差异.

主要成果:

胸部质量偏差在使用CPB缩放的超重人群中达到了总体体重 (TBW) 的7.5%.
在正常体重的受试者中观察到高达35毫米的质量中心 (CoM) 位置差异.
虽然肌肉和剪切力显示了微小的差异 (<4.5%TBW),但压力力在方法之间有6.5-16.0%TBW的差异.

结论:

基于常数百分比 (CPB) 的缩放方法可能会导致预测压力脊柱负荷的显著不准确性,特别是在超重和肥胖个体.
基于身体形状 (BSB) 的方法为估计身体段参数提供了一个潜在的更准确的替代方案.
使用CPB方法预测的压力应在对象特定的肌肉骨建模中谨慎解释,特别是对于体重指数较高的个体.

关键词:

质量中心质量中心.人体的形状人体的形状质量缩放方法质量缩放方法肌肉力量肌肉力量是指肌肉力量.个性化的肌肉骨模型脊柱的负荷是背脊的负荷.干的细分质量.

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