Department of Orthopaedics and Traumatology, Prince of Wales Hospital, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China.
J Biomech. 2012 Jul 26;45(11):2055-7. doi: 10.1016/j.jbiomech.2012.04.025. Epub 2012 May 31.
The inadequate reaction time of the peroneal muscles in response to an incorrect foot contact event has been proposed as one of the etiological factors contributing to ankle joint inversion injury. Thus, the current study aimed to investigate the efficacy of a myoelectric stimulation applied to the peroneal muscles in the prevention of a simulated ankle inversion trauma. Ten healthy male subjects performed simulated inversion and supination tests on a pair of mechanical sprain simulators. An electrical signal was delivered to the peroneal muscles of the subjects through a pair of electrode pads. The start of the stimulus was synchronized with the drop of the sprain simulator's platform. In order to determine the maximum delay time which the stimulus could still resist the simulated ankle sprain motion, different delay time were test (0, 5, 10, and 15ms). Together with the control trial (no stimulus), there were 5 testing conditions for both simulated inversion and supination test. The effect was quantified by the drop in maximum ankle tilting angle and angular velocity, as determined by a motion analysis system with a standard laboratory procedure. Results showed that the myoelectric stimulation was effective in all conditions except the one with myoelectric stimulus delayed for 15ms in simulated supination test. It is concluded that myoelectric stimulation on peroneal muscles could resist an ankle spraining motion.
腓骨肌对错误的足接触事件反应时间不足被认为是导致踝关节内翻损伤的病因之一。因此，本研究旨在探讨腓骨肌肌电刺激在预防模拟踝关节内翻创伤中的效果。10 名健康男性受试者在一对机械扭伤模拟器上进行模拟内翻和外翻测试。通过一对电极片向受试者的腓骨肌发送电信号。刺激的开始与扭伤模拟器平台的下降同步。为了确定刺激仍然可以抵抗模拟踝关节扭伤运动的最大延迟时间，测试了不同的延迟时间（0、5、10 和 15ms）。结合对照试验（无刺激），模拟内翻和外翻测试共有 5 种测试条件。通过运动分析系统和标准实验室程序确定的最大踝关节倾斜角度和角速度的下降来量化效果。结果表明，除了在模拟外翻测试中肌电刺激延迟 15ms 的情况下，肌电刺激在所有情况下都是有效的。结论是，腓骨肌肌电刺激可以抵抗踝关节扭伤运动。
