摘要
评价机械性踝关节不稳定中腓骨肌的功能变化。20名单侧机械性踝关节不稳定患者的双侧踝关节在行走过程中模拟内翻动作时接受表面肌电测试,以患侧踝关节作为不稳定组,以同一患者的对侧无症状踝关节作为正常对照组。计算并比较两组踝关节腓骨长肌和腓骨短肌的标化平均波幅和激发时间的差异。在模拟内翻动作中,不稳定组的腓骨长肌和腓骨短肌的标化平均波幅减小(1.8±0.9;1.9±0.7),腓骨长肌和腓骨短肌的激发时间延迟(73.45±13.92 ms;71.57±11.24 ms),与正常对照组(3.5±2.1;3.8±1.5;59.12±9.15 ms;63.79±10.21 ms)相比,差别均有显著性意义。机械性踝关节不稳定中存在模拟内翻动作时腓骨肌的标化平均波幅下降,激发延迟,这可能导致踝关节习惯性不稳定,并使踝关节更容易扭伤。
To evaluate the function of peroneal tendons in patients with mechanical ankle instability(MAI).A controlled laboratory study was done in twenty patients with unilateral MAI(Group Instability,twenty ankles with MAI;and group control,the contralateral twenty asymptomatic ankles).All ankles experienced the test as patients underwent a sudden ankle inversion perturbation during walking.Surface electromyography(sEMG) of the bilateral peroneal longus and peroneal brevis were recorded during the test.The standardized average EMG amplitudes and on set time in two groups were calculated and compared.During the sudden ankle inversion perturbation,the instability group had lower standardized average EMG amplitudes of peroneal longus(1.8±0.9) and peroneal brevis(1.9±0.7),longer on set time of peroneal longus(73.45± 13.92ms) and peroneal brevis(71.57± 11.24ms) than those of control group(3.5±2.1;3.8±1.5;59.12± 9.15ms;63.79± 10.21ms).Significant differences were seen in all the differences.Lower standardized average EMG amplitudes and delayed on set time are seen in ankles with mechanical instability,which may contribute to recurrent joint instability and may leave the ankle vulnerable to injurious loads.
出处
《生物医学工程研究》
2011年第4期229-231,247,共4页
Journal Of Biomedical Engineering Research
关键词
机械性踝关节不稳定
腓骨肌
表面肌电
标化平均波幅
激发时间
Mechanical ankle instability
Pperoneal tendons,
Surface electromyographic
Standardized average amplitudes
On set time
