Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 20, 2022 - September 22, 2022
It is thought that interference of motor commands, task goals, and visual information between the left and right hands sides may contribute to the difficulty of bimanual movement. If both hands are controlled in mirror alinement at the midline, muscle control is the same in both hands. On the other hand, if both hands are controlled in parallel alignment at the midline, muscle control is not the same in both hands. The visual movements of hands in the horizontal and frontal plane are the same even in the parallel condition, although they are also not the same in the sagittal plane. It was hypothesized that such incongruency of muscle control and visual movements in the sagittal plane induces difficulty of motor control. In this study, rotational movements in the horizontal, frontal, and sagittal planes were measured. Movement direction of a right hand was designed as an experimental condition, mirror condition and non-mirror condition. As a result, in the sagittal plane, the errors and phase deviations between the left and right hands trajectories were greater in the non-mirror image condition than in the mirror condition than in the other motion planes. Therefore, it is suggested that it is more difficult to generate non-mirror image bimanual rotational movement in the sagittal plane than in the frontal and horizontal planes.
