The representation of perceived angular size in human primary visual cortex
The representation of perceived angular size in human primary visual cortex
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DOI：
10.1038/nn1641
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发表时间：
2006-03-01
影响因子：
25
通讯作者：
Kersten, D
中科院分区：
文献类型：
--
作者：
Murray, SO;Boyaci, H;Kersten, D
两个物体以相同的视角投射到视网膜上，如果它们被感知为处于不同的距离，则它们在视野中所占的比例可能会非常不同。在这些大小错觉的感知过程中，初级视皮层（V1）的视网膜图发生了什么变化？在这里，我们表明，使用功能性磁共振成像（fMRI），根据其感知的角度大小的变化的retinotopic表示的对象。一个看起来占据视野更大部分的远处物体比一个被感知为更近更小的相等角度大小的物体激活V1中更大的区域。这些结果表明，在人类视觉系统中，物体的视网膜尺寸和场景中的深度信息在早期就结合在一起。
Two objects that project the same visual angle on the retina can appear to occupy very different proportions of the visual field if they are perceived to be at different distances. What happens to the retinotopic map in primary visual cortex (V1) during the perception of these size illusions? Here we show, using functional magnetic resonance imaging (fMRI), that the retinotopic representation of an object changes in accordance with its perceived angular size. A distant object that appears to occupy a larger portion of the visual field activates a larger area in V1 than an object of equal angular size that is perceived to be closer and smaller. These results demonstrate that the retinal size of an object and the depth information in a scene are combined early in the human visual system.