Abstract

Our study compared the results of two methods of analysis of postural sway during human quiet standing, the rambling-trembling (Rm-Tr) decomposition and the analysis of the point of intersection of the ground reaction forces (zIP analysis). Young, healthy subjects were required to stand naturally and with an increased level of leg/trunk muscle co-activation under visual feedback on the magnitude of a combined index of muscle activation (muscle mode). The main findings included the shift of zIP toward higher frequencies and strong correlations between Tr and zIP when the subjects stood with increased muscle co-activation. We interpret the results within the idea of whole-body control with a set of primitives associated with referent coordinates in the joint configuration space.

摘要

我们的研究比较了两种人类安静站立姿势摇摆分析方法的结果，即散乱-颤抖 ( Rm - Tr ) 分解和地面反作用力交点分析( zIP分析)。年轻、健康的受试者被要求自然站立，并在肌肉激活的组合指数（肌肉模式）的大小的视觉反馈下增加腿部/躯干肌肉的协同激活水平。主要发现包括zIP向更高频率的转变以及Tr和zIP之间的强相关性当受试者站立时肌肉共激活增加。我们使用与关节配置空间中的参考坐标相关联的一组基元，在全身控制的思想中解释结果。