HEAD POSITION SIGNALS USED BY PARIETAL NEURONS TO ENCODE LOCATIONS OF VISUAL-STIMULI
HEAD POSITION SIGNALS USED BY PARIETAL NEURONS TO ENCODE LOCATIONS OF VISUAL-STIMULI
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DOI：
10.1038/375232a0
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发表时间：
1995-05-18
期刊：
影响因子：
64.8
通讯作者：
GOODMAN, SJ
中科院分区：
文献类型：
--
作者：
BROTCHIE, PR;ANDERSEN, RA;GOODMAN, SJ
物体在环境中定位的机制，以及当眼睛、头部和身体移动时对外部世界的感知是稳定的，长期以来一直被认为集中在后顶叶皮质(1-8)。然而，头部位置信号及其与视觉和眼睛位置信号的整合形成了以身体为参照的空间的表示，从未在大脑皮层的任何区域被检查过。在这里，我们展示了顶神经元的视觉和扫视活动强烈地受头部位置的影响。对于单个神经元来说，眼睛和头部的位置效应是相同的，这表明无论眼睛或头部是用来指导凝视的，这种调制都是凝视方向的函数。这些数据与后顶叶皮质在以身体为中心的坐标中包含空间的分布表示的想法是一致的。
THE mechanism for object location in the environment, and the perception of the external world as stable when eyes, head and body are moved, have long been thought to be centred on the posterior parietal cortex(1-8). However, head position signals, and their integration with visual and eye position signals to form a representation of space referenced to the body, have never been examined in any area of the cortex. Here we show that the visual and saccadic activities of parietal neurons are strongly affected by head position. The eye and head position effects are equivalent for individual neurons, indicating that the modulation is a function of gaze direction, regardless of whether the eyes or head are used to direct gaze. These data are consistent with the idea that the posterior parietal cortex contains a distributed representation of space in body-centred coordinates.