床面の違いが立位バランス能力に与える影響

姿勢制御

In this study, to clarify the effects of the intervention of somatosensory information on standing posture and performance, we investigated the center of pressure (COP) during standing on different floor surfaces in seven healthy young subjects. Subjects were asked to stand on three different floor surfaces including a hard surface, a patterned indented surface and a foam cushion surface and to perform static and dynamic balance tasks with their eyes open or closed on one leg or both legs. The postural stability was assessed with the COP sway by calculating the standard deviation of the ordinate data of the COP. The postural mobility was assessed with forward, backward and total voluntary maximum displacements from the center of the force plate. The COP sway during the eye-closed condition was increased more than that during the eye-open condition. The total and backward COP displacement decreased significantly during the eye-closed conditions compared with the eye-open conditions. The performance of the static and dynamic balance tasks on the foam cushion was significantly lower than on the other surfaces. Our findings show that changes in the floor surface lead to differences in the stability and mobility of the standing posture in healthy young subjects.