上运动神经元病变可引起僵直步态,据认为与股直肌在步态负荷相、摆腿相前和开始阶段活动延长或异常有关,由于股直肌的伸膝作用而导致摆腿相膝弯曲度降低。有人认为股直肌摆腿相的肌电活动度比负荷相小。作者为此应用细导线动态肌电图(EMG)就股直肌在正常步态中的作用进行了研究,以确定在各种步行速度下步态周期负荷反应相、摆腿相前和开始阶段的股直肌是否存在EMG活动;以及不同步速对股直肌EMG活动的影响。 Upper motor neuron lesions can cause stiff gait, it is believed that with the rectus femoris in the gait load phase, the leg before and at the beginning phase of prolongation or abnormal activity, due to the rectus femoris caused by knee extension knee joint Curvature decreased. Some people think that the musculomotor leg swing leg phase activity than the load phase is small. For this reason, the authors used the fine-wire dynamic electromyography (EMG) to study the effect of rectus femoris muscle in normal gait in order to determine the effect of gait cycle load reaction phase, leg swing phase and initial stage at various walking speeds Of the rectus femoris exists EMG activity; and different pace of rectus femoris EMG activity.