TIMING AND RELATIVE INTENSITY OF HIP EXTENSOR AND ABDUCTOR MUSCLE ACTION DURING LEVEL AND STAIR AMBULATION - AN EMG STUDY
TIMING AND RELATIVE INTENSITY OF HIP EXTENSOR AND ABDUCTOR MUSCLE ACTION DURING LEVEL AND STAIR AMBULATION - AN EMG STUDY
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DOI：
10.1093/ptj/63.10.1597
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发表时间：
1983-01-01
期刊：
影响因子：
3.2
通讯作者：
ANTONELLI, D
中科院分区：
文献类型：
--
作者：
LYONS, K;PERRY, J;ANTONELLI, D
记录自由步行、快速步行和上下楼梯时髋外展肌和伸肌肌电活动的时间和相对强度。11名健康受试者使用细导线电极进行测试，以记录肌电活动。通过标准化步态期间的所有肌电活动来量化数据，其中肌电活动发生在手动或用测力计抵抗的持续最大等长努力期间。结果表明，髋伸肌有不同的时相模式和峰值时刻。在水平行走，半膜肌和长头股二头肌肌肉显示最大的摆动阶段的活动（开始在中间摆动）。大收肌在最后摆动时开始运动。这两个肌肉和臀大肌是主要的髋关节伸肌活跃在负荷反应。对于上楼梯，臀大肌的下部被证明是主要的髋关节伸肌在负载响应和中期的立场。研究结果还表明，臀大肌的上部功能更像臀中肌比臀大肌的下部在水平和楼梯行走。
The timing and relative intensity of electromyographic activity of hip abductor and extensor muscles were recorded during free and fast velocity walking and during ascent and descent of stairs. Eleven healthy subjects were tested using fine wire electrodes to record the electromyographic activity. Data were quantified by normalizing all electromyographic activity during gait with electromyographic activity occurring during a sustained maximum isometric effort resisted either manually or with a dynamometer. The results indicated that the hip extensor muscles had different phasic patterns and moments of peak activity. During level walking, the semimembranosus and long head of the biceps femoris muscles displayed the greatest swing phase activity (beginning in mid-swing). The adductor magnus muscle followed with its onset in terminal swing. Both this muscle and the gluteus maximus were the principal hip extensors active during the loading response. For ascending stairs, the lower portion of the gluteus maximus muscle proved to be the main hip extensor during the loading response and mid-stance. The findings also showed that the upper portion of the gluteus maximus muscle functioned more like the gluteus medius muscle than the lower portion of the gluteus maximus muscle during both level and stair walking.