三维躯干运动的动态稳定性

目的采用肌肉生理解剖数据分析人体躯干系统三维旋转运动的稳定性．方法采用局部线性化方法和生物动力学模型．结果通过系统运动分析，得到肌肉力和关节反作用力的预报分析值．结论这些量可以用来评价和分析由于各种运动以及不适当的位姿造成的腰椎间盘损伤的状况．它还可以用来分析和估计躯干系统各种组合运动的动力学数据及其相应的神经激励信号

Stability of Three-Dimensional Trunk Motion

Aim To analyse stability of the three-dimensional rotational movements of a human torso system under perturbations using anatomical data of muscles (McGill, 1992). Methods To use the linearized analysis methods and a special model in which the effect of ligamentous and passive resitance by discs and fibers is included. Results The model is capable of predicting the muscle forces,and joint reaction forces at the L5/Sl which are the biomechani- cal factors used to asses the risk of the discs and annulus fibers. Conclusions It can also be used to analyze and neural excitation levels for a diverse Set of trunk movement.