Minneapolis VA Medical Center, Minneapolis, MN 55417, USA.
Disabil Rehabil. 2010;32(26):2201-9. doi: 10.3109/09638288.2010.502586.
The purpose of this article is to provide an overview of our previous work on roll-over shapes, which are the effective rocker shapes that the lower limb systems conform to during walking.
This article is a summary of several recently published articles from the Northwestern University Prosthetics Research Laboratory and Rehabilitation Engineering Research Program on the topic of roll-over shapes. The roll-over shape is a measurement of centre of pressure of the ground reaction force in body-based coordinates. This measurement is interpreted as the effective rocker shape created by lower limb systems during walking.
Our studies have shown that roll-over shapes in able-bodied subjects do not change appreciably for conditions of level ground walking, including walking at different speeds, while carrying different amounts of weight, while wearing shoes of different heel heights, or when wearing shoes with different rocker radii. In fact, results suggest that able-bodied humans will actively change their ankle movements to maintain the same roll-over shapes.
The consistency of the roll-over shapes to level surface walking conditions has provided insight for design, alignment and evaluation of lower limb prostheses and orthoses. Changes to ankle-foot and knee-ankle-foot roll-over shapes for ramp walking conditions have suggested biomimetic (i.e. mimicking biology) strategies for adaptable ankle-foot prostheses and orthoses.
本文旨在概述我们之前关于翻滚形状的研究工作，翻滚形状是下肢系统在行走过程中遵循的有效摇椅形状。
本文是西北大学义肢研究实验室和康复工程研究计划最近发表的几篇关于翻滚形状主题的文章的总结。翻滚形状是地面反作用力的压力中心在基于身体的坐标系中的测量值。该测量值被解释为下肢系统在行走过程中产生的有效摇椅形状。
我们的研究表明，在水平地面行走的条件下，健全受试者的翻滚形状不会有明显变化，包括以不同速度行走、携带不同重量、穿着不同鞋跟高度的鞋子或穿着不同半径的摇椅鞋时。事实上，结果表明，健全的人类会主动改变他们的脚踝运动来保持相同的翻滚形状。
翻滚形状对水平表面行走条件的一致性为下肢假肢和矫形器的设计、对准和评估提供了深入的了解。对于斜坡行走条件下的脚踝-脚和膝盖-脚踝-脚的翻滚形状的变化，为自适应脚踝-脚假肢和矫形器提供了仿生（即模仿生物学）策略。
