An exploration of the function of the triceps surae during normal gait using functional electrical stimulation
An exploration of the function of the triceps surae during normal gait using functional electrical stimulation
复制标题
DOI：
10.1016/j.gaitpost.2006.12.001
复制
发表时间：
2007-10-01
期刊：
影响因子：
2.4
通讯作者：
Roberts, Andrew
中科院分区：
文献类型：
--
作者：
Stewart, Caroline;Postans, Neil;Roberts, Andrew
腓肠肌和比目鱼肌有一个共同的肌腱，在站立阶段都是活跃的，在那里他们被认为是逮捕和控制胫骨前进。比目鱼肌与膝关节伸展力矩的产生有关。腓肠肌穿过膝关节，对膝屈肌有额外的贡献。最近的研究使用诱导加速度分析（IAA）表明腓肠肌和比目鱼肌的动作之间存在明显的差异。本研究的目的是使用步态分析，以提供在体内检查这些理论predictions.Functional电刺激（FES）被选中提供一个扰动的肌肉力量，一个密切的物理模拟IAA的理论预测。五名成年男性受试者，没有步态问题，参加。每个人都有腓肠肌和比目鱼肌刺激在三个不同的时间在正常步态，而3D步态数据收集。测试的顺序是随机的，无刺激的试验随机穿插作为controls.Results显示非常不同的行动比目鱼肌（踝跖屈/膝关节伸展）和腓肠肌（踝背屈/膝关节屈曲）在站立相。腓肠肌的作用的违反直觉的性质表明，需要进一步的临床和生物力学调查，这肌肉的功能。膝盖两侧肌肉的活动证实了IAA的预测。当使用模型预测时，诸如此类的体内证据提供了更大的置信度。这项研究中采用的方法最终可以扩展到其他肌肉和患者人群。(c)2006 Elsevier B.V.保留所有权利。
Gastrocnemius and soleus have a common tendon and both are active during stance phase, where they are thought to arrest and control tibial advance. Soleus is associated with the production of an extending moment at the knee. The two-joint gastrocnemius, which crosses the knee joint, will have an additional contribution to the knee flexors.Recent work using induced acceleration analysis (IAA) has demonstrated distinct differences between the actions of gastrocnemius and soleus. This study aims to use gait analysis to provide in vivo examination of these theoretical predictions.Functional electrical stimulation (FES) was chosen to provide a perturbation in muscle force, a close physical analogue to the theoretical predictions of IAA. Five adult male subjects, with no gait problems, participated. Each had gastrocnemius and soleus stimulated at three different timings during normal gait, while 3D gait data were collected. The order of testing was randomised and unstimulated trials were randomly interspersed to act as a control.The results show very different actions for soleus (ankle plantarflexing/knee extending) and gastrocnemius (ankle dorsiflexing/knee flexing) in stance phase. The counterintuitive nature of the action of gastrocnemius suggests that further clinical and biomechanical investigation into this muscle's function is required. The actions of both muscles at the knee confirm published IAA predictions. In vivo evidence such as this gives greater confidence when using model predictions. The approach adopted in this study could eventually be extended to other muscles and patient populations. (c) 2006 Elsevier B.V. All rights reserved.