Biomechanical model of the human knee evaluated by neuromuscular stimulation
Biomechanical model of the human knee evaluated by neuromuscular stimulation
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DOI：
10.1016/0021-9290(96)00012-7
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发表时间：
1996-09-01
影响因子：
2.4
通讯作者：
Schmidt, G
中科院分区：
文献类型：
--
作者：
Riener, R;Quintern, J;Schmidt, G
开发了一个详细的人类膝盖模型来预测功能性神经肌肉刺激 (FNS) 引起的小腿运动。离散时间模型用于表征刺激参数和肌肉激活之间的关系。肌肉腱致动器的基于 Hill 的模型考虑了肌肉和肌腱的非线性静态和动态特性。详细模拟了肌肉疲劳和被动肌肉粘度。力臂是根据 13 个执行器的肌肉腱路径和关节几何形状计算得出的。该模型还考虑了非线性身体节段动力学。模拟运动通过图形动画可视化。各个模型参数通过人体测量、被动摆测试和特定开环刺激实验等特定程序来确定。将模型结果与表面电极刺激截瘫患者股四头肌获得的实验数据进行比较。测量等长条件下的膝力矩和小腿自由摆动条件下的膝角度。鉴于模型预测与实验数据之间获得良好的对应关系，我们得出结论，FNS 引起的人体运动生物力学模型可以用作支持和加速神经假体开发的数学工具。版权所有 (C) 1996 爱思唯尔科学有限公司
A detailed model of the human knee was developed to predict shank motion induced by functional neuromuscular stimulation (FNS). A discrete-time model is used to characterize the relationship between stimulus parameters and muscle activation. A Hill-based model of the musculotendon actuator accounts for nonlinear static and dynamic properties of both muscle and tendon. Muscle fatigue and passive muscle viscosity are modeled in detail. Moment arms are computed from musculotendon paths of 13 actuators and from joint geometry. The model also takes nonlinear body-segmental dynamics into consideration. The simulated motion is visualized by graphic animation.Individual model parameters were identified by specific procedures such as anthropometric measurements, a passive pendulum test, and specific open-loop stimulation experiments. Model results were compared with experimental data obtained by stimulating the quadriceps muscle of paraplegic patients with surface electrodes. The knee moment, under isometric conditions, and the knee angle, under conditions of freely swinging shank, were measured. In view of the good correspondence obtained between model predictions and experimental data, we conclude that a biomechanical model of human motion induced by FNS can be used as a mathematical tool to support and accelerate the development of neural prostheses. Copyright (C) 1996 Elsevier Science Ltd.