Shimojo S, Kamitani Y, Nishida S
California Institute of Technology, Division of Biology, Computation and Neural Systems, Pasadena, CA, 91125, USA.
Science. 2001 Aug 31;293(5535):1677-80. doi: 10.1126/science.1060161.
An afterimage induced by prior adaptation to a visual stimulus is believed to be due to bleaching of photochemical pigments or neural adaptation in the retina. We report a type of afterimage that appears to require cortical adaptation. Fixating a neon-color spreading configuration led not only to negative afterimages corresponding to the inducers (local afterimages), but also to one corresponding to the perceptually filled-in surface during adaptation (global afterimage). These afterimages were mutually exclusive, undergoing monocular rivalry. The strength of the global afterimage correlated to a greater extent with perceptual filling-in during adaptation than with the strength of the local afterimages. Thus, global afterimages are not merely by-products of local afterimages, but involve adaptation at a cortical representation of surface.
先前对视觉刺激的适应所诱发的后像被认为是由于视网膜中光化学色素的漂白或神经适应。我们报告了一种似乎需要皮层适应的后像类型。注视霓虹色扩散配置不仅会导致与诱导物相对应的负后像（局部后像），还会导致与适应期间感知填充表面相对应的后像（全局后像）。这些后像是相互排斥的，会经历单眼竞争。全局后像的强度在更大程度上与适应期间的感知填充相关，而不是与局部后像的强度相关。因此，全局后像不仅仅是局部后像的副产品，而是涉及表面皮层表征的适应。
