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KMID : 0603920090170040045
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Journal of Korean Academy of Occupational Therapy
2009 Volume.17 No. 4 p.45 ~ p.56
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Effects of EMG Biofeedback Training on the Hand Functions of Stroke Patients
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Jung Jin-Hwa
Yu Jae-Ho
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Abstract
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Objective : The purpose of this study was to identify the difference of peak torque, total work, and average power according to grip size(small, midium and maximal size) on forearm pronation and supination, and thereby provide research materials regarding grip, pronation, and supination strengths, and offer guidelines about optimal grip size of tools.
Methods : Twenty one healthy males who have right dominant hand were recruited for this study. Grip size was divided into three categories(13, 16 & 19cm), and the subjects were measured twice using Biodex System 3 Pro dynamometer isokinetic test. The data were analyzed suing an SPSS 12.0 program for oneway repeated ANOVA and Bonferoni’s correction.
Results : There was a significant difference in peak torque, total work, and average power according to grip size(small, midium & maximal size)(p<.01). Especially middle size of grip showed relatively high numerical value in the peak torque, total work, and average power. For peak torque, the total work , and average power were analyzed comparatively on forearm supination, and showed significant difference in midium vs. maximal and small vs. midium(p<.05), while for forearm pronation, they showed significant difference in midium vs. maximal, small vs. midium & small vs. maximal size(p<.05).
Conclusion : This study shows that there are significant differences in the peak torque, total work & average power according to grip size. Further study is needed to examine impacts of grip size and the sex on forearm torque, and to identify appropriate grip size for each hand.
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KEYWORD
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Average power, Grip size, Isokinetic test, Peak torque, Total work
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