基于足底压力和步态参数分析的水平行走遇滑失稳的自适应平衡反应研究

Research on Adaptive Balance Reaction for Gait Slippery Instability Events on Level Walk Based on Plantar Pressure and Gait Parameter Analysis

目前国内外对于步态失稳现象已开展了大量研究,但尚不清楚平衡调节过程中足底压力与步态参数间的关系。本文利用足底压力与步态分析手段,研究分析人体水平地面行走时遇滑移扰动后激发的自适应平衡反应。本文募集10名健康男性受试者,统一着鞋,于干燥和油介质水平地面进行对比行走试验,并采集分析了时-空步态参数、足底压力参数和垂直地面的反作用力(VGRF)等参数的变化规律。研究结果表明,水平地面行走时遇滑移扰动后自适应平衡反应主要包括:足跟触地更轻、足趾离地时抓地更紧,人体采用更低的步速、更短的跨步长,并增加站立相时间来维持或恢复平衡。本文研究结果将为防止滑跌损伤、康复训练设计及行走辅具的研发等领域开拓新的思路并提供一定参考价值。

Nowadays, for gait instability phenomenon, many researches have been carried out at home and abroad. However, the relationship between plantar pressure and gait parameters in the process of balance adjustment is still unclear. This study describes the human body adaptive balance reaction during slip events on slippery level walk by plantar pressure and gait analysis. Ten healthy male subjects walked on a level path wearing shoes with two contras- tive contaminants （dry, oil）. The study collected and analyzed the change rule of spatiotemporal parameters, plantar pressure parameters, vertical ground reaction force （VGRF）, etc. The results showed that the human body adaptive balance reaction during slip events on slippery level walk mainly included lighter touch at the heel strikes, tighter grip at the toe offs, a lower velocity, a shorter stride length and longer support time. These changes are used to maintain or recover body balance. These results would be able to explore new ideas and provide reference value for slip injury prevention, walking rehabilitation training design, research and development of walking assistive equipments, etc.