SELF-ROTATION ESTIMATE ABOUT THE VERTICAL AXIS
SELF-ROTATION ESTIMATE ABOUT THE VERTICAL AXIS
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DOI：
10.3109/00016489509133338
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发表时间：
1995-01-01
影响因子：
1.4
通讯作者：
KOENIG, E
中科院分区：
文献类型：
--
作者：
ISRAEL, I;SIEVERING, D;KOENIG, E
本文的目的是检查被动全身自转估计的准确性，围绕地球垂直（偏航）轴。要求受试者在黑暗中达到+/-90度、180度或360度的施加角度（向外方向），然后通过受试者控制的被动旋转旋转回到初始位置（返回方向）。在这些旋转过程中，只有半圆形的运河受到刺激。在外向方式上，受试者被要求阐述正确的施加角度，没有任何外部参考。平均而言，被试在向外的方向上低于预期的角度，这表明被试高估了自我旋转，并且误差随着预期角度的增加而增加。在返回途中，受试者必须通过路径整合过程旋转回到起点。施加角度对误差没有影响，且变异性低于向外的方式。数据表明，受试者可以构建一个虚拟起点的内部表示：初始身体位置，这成为一个目标，以达到比向外旋转角度，其中受试者也定义，在剥夺任何外部空间参考的环境中。
The aim of this paper was to examine the accuracy of passive whole-body self-rotation estimate around the earth-vertical (yaw) axis. Subjects were required to reach an imposed angle of +/- 90 degrees, 180 degrees or 360 degrees (outward way), and then to rotate back to the initial position (return way), through passive rotation controlled by the subject, in darkness. During these rotations, only the semi-circular canals were stimulated. On the outward way, subjects were required to elaborate the correct imposed angle, without any external reference. In average, subjects undershot the expected angles on outward way, which suggests an overestimate of self-rotation, and the error increased with increasing expected angle. On the return way, subjects had to rotate back to the starting point, through a path integration process. There was no effect of the imposed angle on the error, and the variability was lower than on the outward way. The data suggests that the subjects could construct the internal representation of a virtual starting point: the initial body position, which became a goal to reach clearer than the outward rotation angle, which the subjects also have defined, in an environment deprived of any external spatial reference.