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KMID : 1012020170060030127
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Physical Therapy Rehabilitation Science
2017 Volume.6 No. 3 p.127 ~ p.133
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Effect of repetitive wrist extension with electromyography-triggered stimulation after stroke: a preliminary randomized controlled study
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Lee Yo-Seb
Cha Yu-Ri
Kim Young
Chung Yi-Jung
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Abstract
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Objective: The purpose of this study was to explore the effect of repetitive wrist extension task training with electromyography (EMG)-triggered neuromuscular electrical stimulation (NMES) for wrist extensor muscle recovery in patients with stroke.
Design: Randomized controlled trial.
Methods: Fifteen subjects who had suffered a stroke were randomly assigned to an EMG-triggered NMES group (n=8) or control group (n=7); subjects in both groups received conventional therapy as usual. Subjects in the experimental group received application of EMG-triggered NMES to the wrist extensor muscles for 20 minutes, twice per day, five days per week, for a period of four weeks, and were given a task to make a touch alarm go off by activity involving extension of their wrist. In the control group, subjects performed wrist self-exercises for the same duration and frequency as those in the experimental group. Outcome measures included muscle reaction time and spectrum analysis. Assessments were performed during the pre- and post-treatment periods.
Results: In the EMG-triggered NMES group, faster muscle reaction time was observed, and median frequency also showed improvement, from 68.2 to 75.3 Hz, after training (p<0.05). Muscle reaction time was significantly faster, and median frequency was significantly higher in the experimental group than in the experimental group after training.
Conclusions: EMG-triggered NMES is beneficial for patients with hemiparetic stroke in recovery of upper extremity function.
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KEYWORD
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Electrical stimulation therapy, Electromyography, Stroke, Wrist
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