Color contrast in macaque V1
Color contrast in macaque V1
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DOI：
10.1093/cercor/12.9.915
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发表时间：
2002-09-01
期刊：
影响因子：
3.7
通讯作者：
Livingstone, MS
中科院分区：
文献类型：
--
作者：
Conway, BR;Hubel, DH;Livingstone, MS
我们探讨了警觉猕猴初级视觉皮层（V1）空间颜色对比（红色看起来更红，周围是绿色）和时间颜色对比（红色看起来更红，如果前面是绿色）的神经基础。使用成对的刺激，我们发现了一个神经元子集，它们对红色和绿色点的序列产生更强的反应，对相邻的红色和绿色点产生更强的反应。这些细胞线性地组合它们的视锥输入：对于红色-ON-中心细胞，对绿色的OFF响应和对红色的ON响应之和预测了对红色的峰值响应，然后是绿色。这些“颜色”细胞，这可能是色调辨别的基础，因为它们表现出圆锥体的一致性，可以调节空间和时间的颜色对比。相反，大多数皮质细胞，不显示明显的视锥细胞，但往往是方向调谐和/或方向选择性，是由自己无法介导的色调歧视。在V1细胞，特别是双对手的颜色细胞，显示出显着的专业化程度进行了讨论。
We explored the neural basis for spatial color contrast (red looks redder surrounded by green) and temporal color contrast (red looks redder if preceded by green) in primary visual cortex (V1) of the alert macaque. Using pairs of stimuli, we found a subset of neurons that gave stronger responses to sequences of red and green spots and stronger responses to adjacent red and green spots. These cells combined their cone inputs linearly: for a red-ON-center cell, the sum of the OFF response to green and the ON response to red predicted the peak response to red preceded by green. These 'color' cells, which could underlie hue discrimination because they show cone opponency, could mediate spatial and temporal color contrast. In contrast, the majority of cortical cells, which do not show overt cone opponency but which are often orientation tuned and/or direction selective, are by themselves incapable of mediating hue discrimination. The remarkable degree of specialization shown by cells in V1, especially that of the double-opponent color cells, is discussed.