The Sussex Colour Group, University of Sussex, Falmer, BN1 9QH, United Kingdom.
School of Psychology, University of Sussex, Falmer, BN1 9QH, United Kingdom.
Sci Rep. 2017 Feb 10;7:42364. doi: 10.1038/srep42364.
Since at least the 17 century there has been the idea that there are four simple and perceptually pure "unique" hues: red, yellow, green, and blue, and that all other hues are perceived as mixtures of these four hues. However, sustained scientific investigation has not yet provided solid evidence for a neural representation that separates the unique hues from other colors. We measured event-related potentials elicited from unique hues and the 'intermediate' hues in between them. We find a neural signature of the unique hues 230 ms after stimulus onset at a post-perceptual stage of visual processing. Specifically, the posterior P2 component over the parieto-occipital lobe peaked significantly earlier for the unique than for the intermediate hues (Z = -2.9, p = 0.004). Having identified a neural marker for unique hues, fundamental questions about the contribution of neural hardwiring, language and environment to the unique hues can now be addressed.
自 17 世纪以来，人们一直认为存在四种简单且可感知的纯“独特”色调：红、黄、绿、蓝，而所有其他色调都被视为这四种色调的混合。然而，持续的科学研究尚未为一种将独特色调与其他颜色分开的神经表示提供确凿的证据。我们测量了独特色调和它们之间的“中间”色调引发的事件相关电位。我们发现，在视觉处理的后知觉阶段，刺激后 230 毫秒会出现独特色调的神经特征。具体来说，顶枕叶后部的 P2 成分对于独特色调的峰值明显早于中间色调（Z=-2.9，p=0.004）。确定了独特色调的神经标记后，现在可以解决关于神经布线、语言和环境对独特色调的贡献的基本问题。
