箸での食事動作における前腕回旋運動と動作時間に関する予備的実験 : 前腕の回旋と肩の外転角度の関係

概要

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The purpose of this study was to determine range of motion of forearm rotation and its velocity in eating. Eighteen young students (6 men and 12 women, age:20.4±1.0 years [range: 19-23]) participated in this study and were categorized into two groups. One group (A group) included 9 subjects with greater shoulder abduction range of motion (mean(±SD):9.6(±3.8) degrees) than the median value (5.5 degrees), while the other (B group) consisted of 9 with less range of motion (mean(±SD):3.4(±0.9) degrees). To measure three dimensional motions of eating pickles with chopsticks, we used an electromagnetic tracking device system. They sat on a height-adjusted chair. Thus olecranon was as height as a wooden desk with 70cm height. A dish was set at a distance of the distal of the elbow. The results indicated A group differed significantly in forearm rotation range of motion (mean (±SD):63.3(±7.1) degrees) from B group (mean(±SD):54.3(±8.9) degrees)(p<0.05), while there was no significant difference in time between the two groups. These findings suggest that the motion of forearm rotation may keep the same rhythm with that of shoulder abduction.
神戸大学の論文