Study of role of spatial orientation in control of action

1)空间定向与动作控制关系的实验研究在被动移动中，驾驶员的感觉和身体平衡与乘客有很大的不同。因此，似乎大脑所感知的东西决定了感觉和行动的内容。这一假设得到了目前实验性的科里奥利刺激的支持，在科里奥利刺激中，当一个人站在旋转平台上时，记录了眼睛的运动和身体的平衡。2)实验装置(旋转平台)的产生虽然在被动旋转过程中倾斜头部会产生奇怪的眼睛运动和压力中心的移动，但很难用简单的规则来解释这一现象。在这项研究中，我们记录了受试者站在旋转平台上时的眼球运动和压力中心。记录是在可见和不可见条件下进行的。眼球运动和身体平衡同样受到大脑外部世界向量的影响，这可以通过向量分析简单地获得。3)提出一种被动和主动控制行动的规则。当在看不见的条件下旋转时，大脑外部世界的空间保持静止，因为旋转是不可感知的。当给予Corilois刺激时，大脑中的空间暂时被来自迷宫的矢量占据。因此，会产生奇怪的眼球运动和身体平衡的变化。另一方面，可见的外部世界反过来旋转大脑中的空间。虽然头部的倾斜会移动大脑中的空间，但通过Corilois刺激的前庭输入被添加到大脑中倾斜的坐标中。因此，无论头部倾斜与否，大脑中的空间都能保持直立。

1) Experimental demonstration of the relation of spatial orientation to action controlDuring passive locomotion, the sensation and bodily balance of a driver are quite different from those of a passenger. Therefore, it seems likely that what the brain perceives determines the contents of sensation as well as action. The hypothesis was supported by the present experimental Coriolis stimulation, in which eye movements and bodily balance were recorded while a subejct was standing on a rotating platform.2) Production of an experimental device (rotating platform)Although tilting of a head during passive rotation produces curious eye movements and shifting of the center of pressure, it was hard to explain the phenomenon by a simple rule. In this study, we recorded eye movements and the center of pressure while subjects stood on a rotating platform. Recording was done under both visible and invisible conditions. Eye movements and bodily balance were equally influenced by the vector of the outer world in the brain which can be simply obtained by vector analysis.3) Proposal of a rule for passive and activ control of actionWhile rotating under an invisible condition, the space of outer world in the brain stays stationary since rotation is not perceived. When Corilois stimulation is given, the space in the brain is temporarily occupied by the vector from the labyrinth. As a result, curious eye movements and shift of bodily balance are produced. On the other hand, visible outer world rotates the space in the brain reversely. Although tilting of a head displaces the space in the brain, vestibular input by Corilois stimulation is added to the tilted coordinates in the brain. As a result, the space in the brain is preserved upright irrespective of head tilting.