RESPONSES OF CELLS IN MONKEY VISUAL-CORTEX DURING PERCEPTUAL FILLING-IN OF AN ARTIFICIAL SCOTOMA
RESPONSES OF CELLS IN MONKEY VISUAL-CORTEX DURING PERCEPTUAL FILLING-IN OF AN ARTIFICIAL SCOTOMA
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DOI：
10.1038/377731a0
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发表时间：
1995-10-26
期刊：
影响因子：
64.8
通讯作者：
UNGERLEIDER, LG
中科院分区：
文献类型：
--
作者：
DEWEERD, P;GATTASS, R;UNGERLEIDER, LG
当我们用一只眼睛观看一个场景时，我们通常看不到视盘和覆盖在视网膜表面上的血管造成的暗点。类似地，当在周边视觉(人工暗点)中稳定地观察包含孔洞的纹理场时，孔洞似乎在几秒钟内被周围的纹理填充，这表明视觉系统跨没有信息可用的区域填充信息(1-5)。在这里，我们表明，在观察有洞的相似质地的猴子中，具有覆盖洞的感受场的纹外视神经元的反应逐渐增加到与相同的没有洞的质地所引起的水平相当的水平。这些活动的动态变化的时间进程与人类观察者感知到的洞口填充的时间进程平行，表明这一过程调节了知觉填充。
WHEN we view a scene through one eye, we typically do not see the scotomas created by the optic disc and the blood vessels overlying the retinal surface. Similarly, when a texture field containing a hole is steadily viewed in peripheral vision (artificial scotoma), the hole appears to fill in with the surrounding texture in a matter of seconds, demonstrating that the visual system fills in information across regions where no information is available(1-5). Here we show that, in monkeys viewing a similar texture field with a hole, the responses of extrastriate visual neurons with receptive fields covering the hole increase gradually to a level comparable to that elicited by the same texture without a hole. The time course of these dynamic changes in activity parallels the time course of perceived filling-in of the hole by human observers, suggesting that this process mediates perceptual filling-in.