快行时脑卒中患者与健康人下肢肌肉活动差异

摘要

Compare the differences between patients and healthy persons under the state of fast walking, including the lower extremity muscles＇ activity duration, AEMG, MPF, complexity. Methods：10 male hemiparetic stroke patients and 10 healthy controls make a linearity walking for 8 steps with the walking velocity, step length of 40cm rhythm of 60 bit per minute. Collecte the surface electromyography of tibialis anterior, gastrocnemius medialis, rectus femoris, biceps femoris on the paretic side and the gait cycle with footswitch. Results： （1）Patients＇ durations of the tibialis an- terior during the swing phase, as well as the gastrocnemius medialis during the swing phase and the first double sup- port phase are significantly longer than healthy controls. （2）The AEMG of patients＇ tibialis anterior and biceps femo- ris are larger than that of controls＇ but the slope of the rectus femoris＇ MPF is smaller than that of controls＇.%目的：探讨快速步行时，脑卒中患者与健康被试下肢肌肉在活动持续时间百分比、AEMG、MPF、复杂度等指标上的差异。方法：男性脑卒中患者10名及健康对照组被试10名，按照步长40cm步频60次／min的不同步速在平地上直线行走8步，采集患者偏瘫侧及健康被试对照侧胫骨前肌、内侧腓肠肌、股直肌、股二头肌的肌电信号，并利用足底步态开关记录行走过程中的步态周期。结果：①患者胫骨前肌在摆动期、内侧腓肠肌在摆动期及第一次双侧支撑期的活动持续时间均显著长于健康被试；②患者胫骨前肌及股二头肌的平均肌电值增加，股直肌的平均功率频率下降率变小。