Rattanaprasert U, Smith R, Sullivan M, Gilleard W
Faculty of Health Sciences, University of Sydney, Australia.
Clin Biomech (Bristol). 1999 Jan;14(1):14-23. doi: 10.1016/s0268-0033(98)00034-5.
Many studies have shown that lack of functional activity of tibialis posterior leads to changes in the longitudinal arch and affects the motion of the foot. A quantitative description of the affects on the motion of the foot in detail has not been reported.
To describe three-dimensional motion of the leg, rearfoot and forefoot with tibialis posterior dysfunction during stance phase of walking in comparison with normals. This study compared one case without the function of tibialis posterior with the ensemble average of 10 normals (five males, five females).
Subjects with 10, 12 mm retroreflective markers placed on their right leg, rearfoot and forefoot, performed five trials of walking at self-selected speed on a 10 m walkway. A four-camera three-dimensional motion analysis system and a synchronized force platform were used to record three-dimensional motions of the segments and force variables during stance phase of walking.
The patterns and range of motion of the rearfoot relative to the leg, and the forefoot relative to the rearfoot demonstrated some differences between the tibialis posterior dysfunction case and normals. Most of the major differences occurred from just prior to heel-off through to toe-off, the period when a stable arch would be required.
The observed differences in the three-dimensional foot motions of the tibialis posterior dysfunction case compared with normals during walking were consistent with the expected mechanical consequences of a foot without the function of tibialis posterior. The one exception was the inversion of the rearfoot which remained normal.
Tibialis posterior dysfunction has been recognized as one of the significant impairments of the musculoskeletal system which affects normal walking. Dynamic investigation adds an understanding of how the muscle controls the foot during walking which is essential information for the diagnosis and the adjustment of treatment and rehabilitation for a tibialis posterior dysfunction case.
许多研究表明，胫后肌功能活动缺乏会导致纵弓改变并影响足部运动。尚未有对足部运动影响的详细定量描述报道。
描述与正常人相比，在步行站立期胫后肌功能障碍时小腿、后足和前足的三维运动。本研究将一名胫后肌无功能的病例与10名正常人（5名男性，5名女性）的总体平均值进行比较。
在受试者的右腿、后足和前足放置10个、12个反光标记，让他们在10米长的通道上以自选速度进行5次步行试验。使用四摄像头三维运动分析系统和同步测力平台记录步行站立期各节段的三维运动和力变量。
后足相对于小腿以及前足相对于后足的运动模式和范围在胫后肌功能障碍病例与正常人之间表现出一些差异。大多数主要差异发生在足跟离地前至足趾离地这段时间，即需要稳定足弓的时期。
与正常人相比，在步行过程中观察到的胫后肌功能障碍病例足部三维运动差异与胫后肌无功能的足部预期力学后果一致。唯一的例外是后足内翻保持正常。
胫后肌功能障碍已被认为是影响正常行走的肌肉骨骼系统的重要损伤之一。动态研究增加了对肌肉在步行过程中如何控制足部的理解，这对于胫后肌功能障碍病例的诊断以及治疗和康复调整是至关重要的信息。
