健常幼児における上肢前方リーチ動作中の体幹筋活動について

概要

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The aim of this study was to investigate trunk muscles performance during forward arm reach in normal children. Subjects were 10 normal pre-school children (6 boys and 4 girls : ages ranged from 3 years 5 months to 6years 1 month). Subjects sat on the box that was adjusted so that hips and knees were flexed to 90 degrees, and the feet contacted the floor, We measured integrated electromyography (Ⅰ-EMG) of rectus abdominis and the trunk extensor muscles during the subject's performance of two types of reaching movements (reaching by right hand, and reaching by both arms), and reach distance. The results show that the mean distance of the right arm was 28.57 cm (±SD 7.32) , and that of both arms was 28.81 cm (±SD 7.05). There was no significant difference between the reach distance by right arm and both arms. The I-EMG of right rectus abdominis was greater than left (p<0.05). There was a significant correlation between the I-EMG of trunk extensor muscles and rectus abdominis in both tasks (p<0.05), the I-EMG of trunk extensor muscles between right and left, and the I-EMG of rectus abdominis between right and left in both tasks (p<0.05). The results from this study suggested that the reach movement in the normal pre-school children are provided by forward tilt movement of trunk rather than trunk rotation movement.
信州大学の論文