Akuzawa Hiroshi, Imai Atsushi, Iizuka Satoshi, Matsunaga Naoto, Kaneoka Koji
School of Sport Sciences, Waseda University, Japan.
Faculty of Sport Sciences, Waseda University, Japan.
J Phys Ther Sci. 2016 Dec;28(12):3458-3462. doi: 10.1589/jpts.28.3458. Epub 2016 Dec 27.
[Purpose] The purpose of the study was to assess the muscle activity change of the tibialis posterior, flexor digitorum longus, and peroneus longus during gait with orthoses. [Subjects and Methods] Sixteen healthy males participated in this study. Activity of each muscle was measured by using fine-wire and surface electromyography. Gait task was performed by the participants barefoot, with footwear and with orthoses. The electromyography data from a stance phase of each gait trial were used for analysis. The stance phase was divided into contact, midstance, and propulsion phases. The data from ten participants were extracted for final analysis, as electromyography measurements were unsuccessful for the other six. [Results] The results demonstrated that orthoses significantly reduced the tibialis posterior muscle activity in the propulsion phase compared to that in the barefoot condition. Although there was a significant difference in the midstance phase, post hoc analysis did not indicate significant differences among the phases. No significant electromyography amplitude change was detected in flexor digitorum longus and peroneus longus. [Conclusion] Orthothes reduced the tibialis posterior activity level during gait. This result may be beneficial for patients with injuries related to excessive activity of tibialis posterior.
[目的] 本研究旨在评估佩戴矫形器行走时胫骨后肌、趾长屈肌和腓骨长肌的肌肉活动变化。[对象与方法] 16名健康男性参与了本研究。使用细丝电极和表面肌电图测量每块肌肉的活动。参与者分别在赤足、穿着鞋和佩戴矫形器的情况下进行步态任务。每次步态试验站立期的肌电图数据用于分析。站立期分为着地、支撑中期和推进期。由于另外6名参与者的肌电图测量未成功，最终分析提取了10名参与者的数据。[结果] 结果表明，与赤足状态相比，矫形器在推进期显著降低了胫骨后肌的肌肉活动。尽管支撑中期存在显著差异，但事后分析并未显示各阶段之间存在显著差异。未检测到趾长屈肌和腓骨长肌的肌电图幅度有显著变化。[结论] 矫形器降低了行走过程中胫骨后肌的活动水平。这一结果可能对与胫骨后肌过度活动相关损伤的患者有益。
