Duncan Chad S, Roth Eric J, Mizokami Yoko, McDermott Kyle C, Crognale Michael A
Department of Psychology, University of Nevada, Reno 0296, 1664 N. Virginia Street, Reno, Nevada 89557, USA.
J Opt Soc Am A Opt Image Sci Vis. 2012 Feb 1;29(2):A152-6. doi: 10.1364/JOSAA.29.00A152.
Results from psychophysics and single-unit recordings suggest that color vision comprises multiple stages of processing. Postreceptoral channels appear to consist of both a stage of broadly tuned opponent channels that compare cone signals and a subsequent stage, which includes cells tuned to many different directions in color space. The chromatic visual evoked potential (crVEP) has demonstrated chromatic processing selective for cardinal axes of color space. However, crVEP evidence for higher-order color mechanisms is lacking. The present study aimed to assess the contribution of lower- and higher-order color mechanisms to the crVEP by using chromatic contrast adaptation. The results reveal the presence of mechanisms tuned to intermediate directions in color space in addition to those tuned to the fundamental cardinal axes.
心理物理学和单神经元记录的结果表明，颜色视觉包括多个处理阶段。感受器后通道似乎由两个阶段组成：一个是对锥体信号进行比较的宽调谐对立通道阶段，以及随后的一个阶段，其中包括在颜色空间中调谐到许多不同方向的细胞。彩色视觉诱发电位（crVEP）已证明对颜色空间的基本轴具有选择性的颜色处理。然而，缺乏关于高阶颜色机制的crVEP证据。本研究旨在通过使用颜色对比适应来评估低阶和高阶颜色机制对crVEP的贡献。结果揭示，除了那些调谐到基本基本轴的机制外，还存在调谐到颜色空间中间方向的机制。
