A model of load sharing between muscles and soft tissues at the human knee during static tasks
A model of load sharing between muscles and soft tissues at the human knee during static tasks
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DOI：
10.1115/1.2796019
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发表时间：
1996-08-01
影响因子：
1.7
通讯作者：
Buchanan, TS
中科院分区：
文献类型：
--
作者：
Lloyd, DG;Buchanan, TS
在这项研究中，我们让受试者自愿在脚踝上方的横向平面上产生各种力。通过使用膝关节生物力学模型分析实验数据，确定了他们的肌肉和软组织对支撑总外部膝关节力矩的贡献。在此模型中，使用记录的肌电图来估计肌肉力量。为了考虑受试者的变异性，使用模型估计的屈曲和伸展关节力矩与外部记录的非线性最小二乘拟合来调整各种肌肉参数。使用估计的肌肉力，可以获得肌肉和其他软组织对总关节力矩的贡献。结果表明，肌肉主要用于支撑膝盖的屈曲和伸展负荷，但这样做能够支撑内翻或外翻的某些部分。然而，仍然需要软组织贷款。在纯内翻和外翻中，软组织平均最多可承受 83% 的外部负荷。纯内翻和外翻时的软组织负荷小于外部负荷的 100%，因为肌肉平均能够支撑外部负荷的 17%。这种肌肉支撑是通过肌肉共同收缩和/或特定的肌肉激活来实现的。
In this study, we had subjects voluntarily generate various forces in a transverse plane just above their ankles. The contributions of their muscles and soft tissues to the support of the total external knee joint moment were determined by analyzing the experimental data using a biomechanical model of the knee. In this model, muscle forces were estimated using the recorded EMGs. To account for subject variability, various muscle parameters were adjusted using a nonlinear least-squares fit of the model's estimated flexion and extension joint moments to those recorded externally. Using the estimated muscle forces, the contributions from the muscles and other soft tissues to the total joint moment were obtained. The results showed that muscles were primarily used to support flexion and extension loads at the knee, but in so doing, were able to support some part of the varus or valgus lends. However, soft tissue lending was still required. Soft tissues supported up to an average maximum of 83 percent of the external load in pure varus and valgus. Soft tissue loading in pure varus and valgus was less than 100 percent of the external load as the muscles, on average, were able to support 17 percent of the external load. This muscle support was by virtue of muscle cocontraction and/or specific muscle activation.