Compression of visual space before saccades
Compression of visual space before saccades
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DOI：
10.1038/386598a0
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发表时间：
1997-04-10
期刊：
影响因子：
64.8
通讯作者：
Burr, DC
中科院分区：
文献类型：
--
作者：
Ross, J;Morrone, MC;Burr, DC
扫视眼球运动，其中眼睛在两个静止位置之间快速移动，移动我们的视网膜图像的位置。如果我们对世界的感知要保持稳定，与视网膜部位相关的视觉方向以及它们报告的其他视觉方向必须更新以补偿注视点的变化，长期以来，人们一直怀疑这种补偿是通过视网膜外位置信号驱动的坐标的均匀移位来实现的（1-3），尽管有些人认为这是不必要的（4-6）。相当大的努力已经投入到搜索这样的信号，并测量其时间过程和准确性，在这里，通过使用多个以及在正常观看条件下的单个目标，我们表明，在表观视觉方向的变化预期扫视，并不是相同的大小，甚至在相同的方向，对于视野的所有部分，我们还表明，有一个压缩的视觉空间足以减少间距，甚至明显的图案元素的数量，这些结果与顶叶皮层（7）和上级丘（8）神经元感受野的预期变化的电生理学发现部分一致。
Saccadic eye movements, in which the eye moves rapidly between two resting positions, shift the position of our retinal images, If our perception of the world is to remain stable, the visual directions associated with retinal sites, and others they report to, must be updated to compensate for changes in the point of gaze, It has long been suspected that this compensation is achieved by a uniform shift of coordinates driven by an extraretinal position signal(1-3), although some consider this to be unnecessary(4-6). Considerable effort has been devoted to a search for such a signal and to measuring its time course and accuracy, Here, by using multiple as well as single targets under normal viewing conditions, we show that changes in apparent visual direction anticipate saccades and are not of the same size, or even in the same direction, for all parts of the visual field, We also show that there is a compression of visual space sufficient to reduce the spacing and even the apparent number of pattern elements,The results are in part consistent with electrophysiological findings of anticipatory shifts in the receptive fields of neurons in parietal cortex(7) and superior colliculi(8).