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KMID : 1012020220110040526
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Physical Therapy Rehabilitation Science
2022 Volume.11 No. 4 p.526 ~ p.534
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Comparison of Upper Extremity Muscle Activity between Stroke Patients and Healthy Participants while Performing Bimanual Tasks
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Kim Nam-Woo
Jo Sung-Bae
Bae Kyeong
Song Chang-Ho
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Abstract
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Objective: The purpose of this study was to compare muscle activities of stroke patients and healthy participants during bimanual tasks.
Design: A cross sectional study.
Methods: A total of 25 participants (13 hemiparetic stroke patients and 12 healthy participants) were recruited. The muscle activities using electromyogram (EMG) during bimanual tasks were collected from the following muscles: extensor carpi radialis longus (ECRL), biceps brachii (BB), and triceps brachii (TB). The bimanual tasks included eight tasks consisted of (1) raising the wrists up and down, (2) supinating and pronating the palms, (3) touching the shoulder with fingertips, (4) drawing vertical dot, (5) reaching for a cup and bring it in to drink, (6) drawing a circle outward and (7) inward, and (8) grasping the fingers. The EMG data collected from the muscles of paretic and non-paretic sides of stroke patients and the average from both sides of healthy subjects were normalized and compared after calculating the percentage of maximal isometric voluntary contraction.
Results: The ECRL, BB and TB of the paretic side of the stroke patients showed relatively greater muscle activity compared to the non-paretic side as well asaverage of the healthy subject duringall tasks (p<0.05). In addition, the ECRL showed the highest muscle activity during most of the tasks. All of the non-paretic side musclesfrom stroke patients showed higher muscle activity compared to those of healthy subjects.
Conclusions: The current study showed that muscle activities of upper extremity varied between paretic and non-paretic sides of stroke patients during bimanual tasks. Interestingly, the non-paretic side muscle activities were also different from those of normal participants.
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KEYWORD
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Stroke, Muscle activity, Hemiplegia, Upper extremity
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