人体跖践关节弯曲对行走步态特征的影响

目的：研究人体跖趾关节弯曲对步态特征的影响，在该关节运动受约束后，其它关节的补偿方式。方法：5个健康男性志愿者参加了实验，分别就正常情况和跖趾关节运动受到约束时的自然步态特征从实验的角度进行了研究。结果：在跖趾关节运动受到约束后，人体其它关节角位移峰-峰值和角速度峰-峰值均有明显变化。结论：为实现由于跖趾关节受到约束后的协调行走，人体其它关节会有相应的补偿运动，而且是通过多关节的协调运动来进行的。但各关节对协调运动的贡献大小是不同的。通过实验可知，运动补偿主要发生在踝关节和膝关节，同时上躯干也加入到补偿之中。由于多关节协调运动补偿，人体在跖趾关节运动受到约束后，其自然行走步态的平均步速和步长可达到正常情况的94.8%和95.5%。

The influence of flexion of metatarsophalangeal joint on gait characteristics

Objective: To investigate the flexion of metatarsophalangeal (MP) joint on gait pattern and the responses of the subjects when their MP joints are constrained. Method: Five healthy young subjects were instructed to walk at their preferred speed on level pathway with and without MP joints flexion. Result: The apparent differences can be seen between the peak angular displacements and velocities of each joint for subjects with and without MP joints constraint. Conclusion: When the MP joints are constrained, the other joints will make some compensatory efforts. Apparent multi-joint coordination motion compensatory strategy is employed when the MP joints are constrained, which means that hip, knee and ankle joints make corresponding compensatory efforts. But their compensatory contributions are different; the knee and ankle joints do dominant compensatory functions, besides, the back do some compensatory function also. Due to the contributions of all joints, subjects with constrain of MP joints can also walk in a nearly normal gait pattern, with average speed and stride length of 94.8%and 95.5% of the normal respectively.