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KMID : 1137820110320040312
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의공학회지
2011 Volume.32 No. 4 p.312 ~ p.318
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A Comparative Evaluation about Force and Fatigue on Thumb according to Input Type for Repetitive Use of Mobile Phone
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Kim Cheol-Min
Park J.-H.
Son Kwon
Kim Kwang-Hun
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Abstract
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The purpose of study was to evaluate effects for repetitive use of thumb according to two different input types (button and touch) of mobile phones. A total of eight young and healthy subjects (6 males and 2 females: years) volunteered, and force measurement on thumb using film type pressure sensor was carried out for an hour. Before the experiment De Quervain’s syndrome test were performed to check the left and right muscles related with thumb motion and after measuring the pressing force fatigue feeling survey achieved. For a statistical analysis, 1-to-5 ranking scale was used to score the fatigue feeling. From the result of pressure measurement, forces acting on thumb in button type were 3.36 times (the right thumb) and 3.16 times (the left thumb) for the touch type. And the result of survey, fatigue by using the button type of mobile phone was largely triggered than by using touch type. The abductor pollicis brevis and the flexor pollicis brevis were found as common part of fatigue for repetitively using thumb during texting messages. In the further study, some quantitative fatigue comparisons for various input motions are required to analyze repetitive strain injury syndrome.
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KEYWORD
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Repetitive Strain Injury, mobile phones, thumb, fatigue, force
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