Background

Sensorimotor foot orthoses is an alternative concept, which in addition to mechanical effects, are designed to change muscle activation by altering sensory input to the plantar surface of the foot. However, there is little evidence of how these affect the kinematics of the foot during gait.

Research question

The aim of the study was to explore the immediate effect of calcaneal medial heel bars and retrocapital bars on foot kinematics during the stance phase of gait.

Methods

Kinematic data were collected from 32 healthy individuals using an eight camera motion capture system and a six-degrees-of-freedom multi-segment foot model in three different orthotic conditions; calcaneal medial heel bar, retrocapital bar, and no orthosis. Vector field statistical analysis was performed to explore the effect of the orthotic conditions over the kinematic time series curves during stance phase. Peak median and interquartile ranges were also reported during the different phases of stance.

Results

The calcaneal medial bar significantly decreased rearfoot eversion for the majority of the stance phase and compensatory increased midfoot eversion during the entire stance phase compared to the no orthosis condition. The retrocapital bar rotated the foot externally significantly abducting the rearfoot for the entire stance phase and the midfoot for the majority of stance phase.

Significance

The calcaneal medial heel bar and retrocapital bar significantly altered the foot kinematics in a way that may benefit patients with abnormal pronation and intoeing gait.

中文翻译：

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感觉运动足矫形器对健康成年人足运动的即时影响

背景

感觉运动足矫形器是一个替代概念，除了机械作用外，还可以通过改变对足底表面的感觉输入来改变肌肉的激活。但是，几乎没有证据表明它们在步态过程中如何影响脚的运动学。

研究问题

这项研究的目的是探讨步态步态阶段跟骨内侧跟跟和后向跟骨对足部运动的即时影响。

方法

在八个不同的矫正条件下，使用八个摄像头运动捕捉系统和一个六自由度多段脚模型从32个健康个体收集运动数据。跟骨内侧足跟杆，后资本杆，无矫形器。进行了矢量场统计分析，以探索矫正条件对姿态阶段运动学时间序列曲线的影响。在不同的立场阶段，也报告了峰值中位数和四分位间距。

结果

与无矫形情况相比，跟骨内侧横杠在大部分站立阶段均明显减少了后足外翻，而在整个站立阶段中，代偿性增加了中足外翻。后资本杠从外部旋转脚，从而在整个站立阶段显着绑架了后足，在大多数站立阶段都绑架了中足。

意义

跟骨内侧后跟横杆和后向横杆显着改变了脚部运动学，可能有益于异常前旋和足趾步态的患者。