Ichikawa M, Ito M, Takatsu H, Kakogawa M, Watanabe S
Department of Living and Health Sciences, Joetsu University of Education, Joetsu.
Environ Med. 1995 Oct;39(2):145-8.
This study examined how postural readjustments caused by a moving scene can be affected by placing a fixed point (FP) onto the moving scene. Thirty-two healthy subjects participated in this study. Each subject maintained Romberg's position on a platform while vertical optokinetic stimulation (VOKS) was presented. A random dot pattern moving in a downward direction was projected on a large hemispherical screen placed in front of the subject. The magnitude of vection and forward displacement from the center of foot pressure (CFP) caused by VOKS were compared under two conditions: with and without FP. With FP, the magnitude of vection increased towards slow VOKS velocity, while forward displacement of CFP decreased significantly. These results indicate that an FP placed in a moving pattern may contribute to stabilizing postural orientations.
本研究探讨了在移动场景上放置一个固定点（FP）如何影响由移动场景引起的姿势调整。32名健康受试者参与了本研究。每位受试者在平台上保持罗姆伯格姿势，同时进行垂直视动刺激（VOKS）。向下移动的随机点图案投射在受试者前方的一个大半球形屏幕上。在有和没有FP的两种条件下，比较了VOKS引起的摆动幅度和足底压力中心（CFP）的向前位移。有FP时，摆动幅度随着VOKS速度减慢而增加，而CFP的向前位移显著减小。这些结果表明，放置在移动图案中的FP可能有助于稳定姿势方向。
