Vection increases the magnitude and accuracy of visually evoked postural responses
Vection increases the magnitude and accuracy of visually evoked postural responses
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DOI：
10.1007/s00221-002-1296-1
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发表时间：
2002-12-01
影响因子：
2
通讯作者：
Bronstein, AM
中科院分区：
文献类型：
--
作者：
Thurrell, AEI;Bronstein, AM
大视觉场景的运动会引起自我运动（矢量）和姿势反应的错觉。我们研究了自我运动的有意识感知是否影响视觉诱发的姿势反应的幅度和方向准确性。五个正常受试者固定在滚动（冠状）平面上旋转的大圆盘的中心。圆盘放置在受试者前方或与受试者左右倾斜 30 度；在这些倾斜位置，椎间盘固定仅通过水平眼偏来实现（即无颈偏）。受试者用按钮表示他们的主观感知状态，无论是矢量还是物体运动。结果证实，视觉诱发的姿势反应的方向根据不同的眼盘位置进行重新定向。此外，在矢量周期期间，姿势反应的幅度及其与盘旋转平面对准的准确性均显着增加。结果表明，对自我运动的有意识感知可以增强视觉姿势表现。由于意识感知很可能出现在皮质水平，因此研究结果表明，皮质是凝视方向与视网膜运动信号相互作用的部位之一，以身体为中心的坐标提供自我运动信号。这种相互作用为环境中运动期间的空间表示提供了基础。
Movement of large visual scenes induces an illusion of self-motion (vection) and postural responses. We investigated if the conscious perception of self-motion influences the magnitude and directional accuracy of visually evoked postural responses. Five normal subjects fixated the centre of a large disk rotating in the roll (coronal) plane. The disk was placed either in front of the subjects or obliquely 30 deg to their right or left; in these oblique positions disk fixation was achieved by horizontal ocular deviation alone (i.e. no neck deviation). Subjects indicated their subjective perceptual status, either vection or object motion, with a push button. The results confirmed that the direction of the visually evoked postural response was reoriented according to the different eye-disk positions. In addition, both the magnitude of the postural response and the accuracy of its alignment with the disk rotational plane were significantly increased during vection periods. The results show that conscious perception of self-motion enhances visuopostural performance. Since conscious perception is likely to arise at cortical levels, the findings indicate that the cortex is one of the sites where gaze direction interacts with retinal motion signals to provide a self-motion signal in body-centric co-ordinates. Such interaction provides a substrate for spatial representation during motion in the environment.