Measurement of the Spatial Motion of the Ankle-Subtalar Complex

Ning Ying, Wangdo Kim
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Abstract

A modified Euler angles method, dual Euler angles approach, has been proposed to describe exact joint motion. In the dual Euler angles method, joint motion is considered as three successive screw motions with respect to the axes of the moving segment coordinate system and the screw motion displacements are represented by dual angles accordingly. The algorithm for calculating dual Euler angles from coordinates of markers on joint segments has also been provided. In this paper, the dual Euler angles method is applied to describe the motion of ankle joint during dorsiflexion-plantarflexion. Due to the difficulty in tracking the motion of the talus segment in vivo, only the overall motion of the ankle-subtalar complex, that is, the relative motion of the foot with respect to the shank, was measured in the present study.
踝-距下复合体空间运动的测量
提出了一种改进的欧拉角法,即对偶欧拉角法来描述关节的精确运动。在双欧拉角法中,将关节运动视为相对于运动线段坐标系轴的连续三次螺旋运动,螺旋运动位移用双角度表示。给出了由关节段上标记点坐标计算对偶欧拉角的算法。本文采用双欧拉角法描述踝关节在背屈-跖屈过程中的运动。由于难以在体内跟踪距骨节的运动,因此本研究仅测量了踝关节-距下复合体的整体运动,即足相对于小腿的相对运动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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