The study of EMG elicited from the shoulder in hemiplegic patients.

概要

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As clinicians are well aware, hemiplegia is often accompanied by shoulder subluxation. But in spastic cases, reduction of subluxation have been seen in their walking. We analyzed factors affecting this phenomenon by using EMG.There were 6 women and 12 men, 7 being hemiplegic on the right, 10 on the left and 1 normal. We classfied the function of upper extremity (U/E) in hemiplegic patients into 6 degrees by using Brunnstrom's scale.As a result, the following findings of EMG in hemiplegic patients were seen.1) High potential amplitude elicited from biceps brachii was seen in lower stage (in II-IV stage of Brunnstrom's scale).2) Supraspinatus played a role in reduction of shoulder subluxation more largery as increasing the functional stage of shoulder. This fact was seen from II stage of Brunnstrom's scale. And at last, Supraspinatus participated largely.3) Deltoideus played a role only in higher stage (in IV-V stage). These findings suggest that flexion synergy of U/E may participate in the reduction of shoulder subluxation in hemiplegic patients.