手伸ばし運動におよぼす視野変換の効果

概要

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This study was concerned with the adaptation process of visually guided reaching movement under the prismic displacement vision to examine the effects of visual informations on reaching and grasping movement. Subjects were asked to reach and grasp a target with their right hand ten times repertedly while wearing up-down reversing goggles. For evaluating their movements, arm trajectory, grip size, hand velocity and hand acceleration were calculated every 1/30 sec on the basis of the screen images from the VTR tape by means of a microcomputer. The results indicated that the timing of speed control in reaching movement and the degree of maximum deceleration are programmed before the beginning of the movement. It was also suggested that the arm trajectory might be formed after the beginning of the movement using the visual informations since an arm trajectory was varied with the change of visual information. Lastly, this study could examined the usefulness of the analysis of time course in movement behavior for the study of adaptation to the reversed vision situations.
1991-03-31