Title: Analysis on hemiparetic gait after stroke with surface electromyography and dynamic joint angle analysis system and its rehabilitation strategy
Abstract: Objective To explore the characteristics of hemiparetic gait of patients with stroke,and to study the roles of surface electromyography( sEMG) and dynamic joint angle analysis in guiding rehabilitation of hemiparetic gait. Methods A total of 13 participants with stroke hemiparesis were enrolled in the experiment,while 8 normal adults were included as control group. The 12 groups of muscles in affected legs and 4 groups of muscles in normal legs of participants were recorded with sEMG system,and the dynamic joint angle of legs was recorded with 3D-video gait analysis system. The parameters of sEMG and the dynamic joint angle were measured for the comparison between the experimental group and control group. Results In comparison with normal gaits,the root mean square( RMS) of ankle abductors,medial and lateral head of the gastrocnemius of the affected legs in stance phase decreased significantly( P 0. 01). The RMS of lateral head of the gastrocnemius of the normal legs in swing phase increased significantly( P 0. 05). Multivariate correlation analysis showed that there were significant correlations between gait velocity and the RMS of ankle abductors,tibialis anterior muscles of the affected legs in stance phase,and the median frequency of rectus femoris,medial head of quadriceps of the affected legs in stance phase( P 0. 05). The curves of dynamic joint angle of ankles in the affected legs were the shape‘∧',other than the normal shape‘M',showing foot drop without dorsiflexion initiatively. The curves of dynamic joint angle of knees in the affected legs were not smooth,showing unstable knee joint without flexion and extension initiatively. Conclusion The abnormal hemiplegic gait and slow gait velocity are related to the decreased support force of hemiplegic lower limbs,the weak muscles of lower legs and abnormal ankle and knee joint angles. The function of ankle joints is important for the ability ofwalking for patients with hemiplegia.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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Cited By Count: 2
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