视觉皮层中的亮度处理
Brightness processing in the visual cortex.
作者信息
Salmela Viljami R, Laurinen Pentti I
机构信息
Department of Psychology, University of Helsinki, Finland.
出版信息
Neurosci Lett. 2007 Jun 13;420(2):160-2. doi: 10.1016/j.neulet.2007.04.068. Epub 2007 May 5.
Single cell recordings have shown that some cells in the primary visual cortex (V1) signal surface brightness. However, fMRI experiments have found brightness related activation only in the higher cortical areas. In a psychophysical setup, we were able to dissociate the reduction of brightness caused by Gabor flankers, similar to the receptive fields in V1, from the edge induced brightness change. The former resemble the single cell recording results and the latter the fMRI results.
单细胞记录表明，初级视觉皮层（V1）中的一些细胞会发出表面亮度信号。然而，功能磁共振成像（fMRI）实验发现，与亮度相关的激活仅出现在较高的皮层区域。在一个心理物理学实验装置中，我们能够将由Gabor侧翼（类似于V1中的感受野）引起的亮度降低与边缘诱导的亮度变化区分开来。前者类似于单细胞记录结果，后者类似于fMRI结果。
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