Centre for Health Sciences Research, University of Salford, Salford, United Kingdom.
Med Sci Sports Exerc. 2012 Dec;44(12):2384-91. doi: 10.1249/MSS.0b013e318265df1d.
INTRODUCTION/PURPOSE: The aim of this study was to describe the effect of an antipronation foot orthosis on motion of the heel relative to the leg and explore the individual contributions of the ankle and subtalar joints to this effect.
Five subjects were investigated using invasive intracortical pins to track the movement of the tibia, talus, and calcaneus during walking with and without a foot orthosis.
The antipronation foot orthosis produced small and unsystematic reductions in eversion and abduction of the heel relative to the leg at various times during stance. Changes in calcaneus-tibia motion were comparable with those described in the literature (1°-3°). Changes at both the ankle and subtalar joints contributed to this orthotic effect. However, the nature and scale of changes were highly variable between subjects. Peak angular position, range of motion, and angular velocity in frontal and transverse planes were affected to different degrees in different subjects. In some cases, changes occurred mainly at the ankle; in other cases, changes occurred mainly at the subtalar joint.
The changes in ankle and subtalar kinematics in response to the foot orthosis contradict existing orthotic paradigms that assume that changes occur only at the subtalar joint. The kinematic changes due to the orthosis are indicative of a strong interaction between the often common function of the ankle and subtalar joints.
简介/目的：本研究旨在描述一种反旋前足矫形器对脚跟相对于腿部运动的影响，并探讨踝关节和距下关节对这种影响的个体贡献。
使用微创的皮质内钉，对 5 名受试者进行跟踪，以在穿戴和不穿戴足矫形器时的步行过程中跟踪胫骨、距骨和跟骨的运动。
反旋前足矫形器在站立时的不同时间点，使脚跟相对于腿部的外旋和外展角度减小，但幅度较小且无规律。跟骨-胫骨运动的变化与文献中描述的相似（1°-3°）。踝关节和距下关节的变化都有助于这种矫形效果。然而，在不同受试者之间，变化的性质和幅度差异很大。在不同的受试者中，额状面和横断面上的峰值角位置、运动范围和角速度都受到不同程度的影响。在某些情况下，变化主要发生在踝关节；在其他情况下，变化主要发生在距下关节。
足矫形器引起的踝关节和距下关节运动学变化与现有的矫形理论相悖，该理论假设变化仅发生在距下关节。矫形器引起的运动学变化表明踝关节和距下关节的功能通常是相互关联的。
