The orientation selectivity of color-responsive neurons in macaque V1.
The orientation selectivity of color-responsive neurons in macaque V1.
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DOI：
10.1523/jneurosci.1404-08.2008
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发表时间：
2008-08-06
期刊：
影响因子：
--
通讯作者：
Shapley R
中科院分区：
文献类型：
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作者：
Johnson EN;Hawken MJ;Shapley R
形式对色彩感知有很强的影响。我们通过研究猕猴初级视觉皮层（V1）单个细胞对纯颜色模式的定向选择性，探讨了V1中形式-颜色联系的神经基础。根据视锥细胞的输入和空间选择性，将对颜色有反应的神经元分为单对手组和双对手组。单对手细胞对颜色反应良好，但对亮度对比反应较弱；它们对颜色图案没有方向选择性。大多数双对手细胞对纯颜色刺激和消色差图案具有定向选择性。我们还发现非对抗性细胞对纯颜色的反应很弱或根本没有反应；大多数是定向选择的亮度模式。双对手细胞和非对手细胞的取向选择性不是对比不变的；选择性通常随着对比度的增加而增加。当刺激在平均锥体对比度下匹配时，双对手细胞对亮度和等效颜色刺激的定向选择性大致相同。V1双对手细胞可能是形状对颜色感知影响的神经基础。V1单双对手细胞的联合活动是完整的色彩感知所必需的。
Form has a strong influence on color perception. We investigated the neural basis of the form-color link in macaque primary visual cortex (V1) by studying orientation selectivity of single V1 cells for pure color patterns. Neurons that responded to color were classified, based on cone inputs and spatial selectivity, into chromatically single-opponent and double-opponent groups. Single-opponent cells responded well to color but weakly to luminance contrast; they were not orientation-selective for color patterns. Most double-opponent cells were orientation-selective to pure color stimuli as well as to achromatic patterns. We also found non-opponent cells that responded weakly or not at all to pure color; most were orientation-selective for luminance patterns. Double- and non-opponent cells’ orientation selectivities were not contrast-invariant; selectivity usually increased with contrast. Double-opponent cells were approximately equally orientation-selective for luminance and equiluminant color stimuli when stimuli were matched in average cone contrast. V1 double-opponent cells could be the neural basis of the influence of form on color perception. The combined activities of single- and double-opponent cells in V1 are needed for the full repertoire of color perception.