Clément G, Pozzo T, Berthoz A
Laboratoire de Physiologie Neurosensorielle du CNRS, Paris, France.
Exp Brain Res. 1988;73(3):569-76. doi: 10.1007/BF00406615.
The present study attempts to clarify the relationship between eye and body positioning during an upside-down standing posture on the hands. In this posture the head was observed to be stable and the eyes were anchored to an earth-fixed target. We measured the variations of body sway when subjects displaced their gaze upward or downward from their anchoring position. They did this voluntarily under instruction, and involuntarily by means of base-down or base-up wedge prisms. Results show that the anchoring point chosen by the subjects corresponds to a perceived limit of their body sway. They suggest that vision is also used to convey the desired optimal zone for the center of gravity in cases where fine balance is required.
本研究试图阐明在手倒立姿势下眼睛与身体位置之间的关系。在这种姿势下，观察到头部是稳定的，眼睛固定在一个相对于地球静止的目标上。当受试者将目光从其固定位置向上或向下移动时，我们测量了身体摆动的变化。他们在指令下自愿进行此操作，并且通过底朝下或底朝上的楔形棱镜非自愿地进行此操作。结果表明，受试者选择的固定点对应于他们身体摆动的一个可感知极限。结果表明，在需要精确平衡的情况下，视觉也被用于传达重心的理想最佳区域。
