DEPTH IS ENCODED IN THE VISUAL-CORTEX BY A SPECIALIZED RECEPTIVE-FIELD STRUCTURE
DEPTH IS ENCODED IN THE VISUAL-CORTEX BY A SPECIALIZED RECEPTIVE-FIELD STRUCTURE
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DOI：
10.1038/352156a0
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发表时间：
1991-07-11
期刊：
影响因子：
64.8
通讯作者：
FREEMAN, RD
中科院分区：
文献类型：
--
作者：
DEANGELIS, GC;OHZAWA, I;FREEMAN, RD
视觉皮层中的双眼神经元被认为执行眼睛位于前部的动物所表现出的精细立体深度辨别的第一阶段处理。 因为眼睛的横向分离给予每只眼睛略微不同的视图，所以在两个视网膜图像中的对应特征之间存在位置的小变化（视差），主要是沿着水平维度。 视觉系统利用这些差异来测量深度。 我们研究了猫视觉皮层的神经元，以确定视觉系统是否在水平和垂直视差范围内使用各向异性。 我们在这里报告说，有一个相应的各向异性的皮质表示的双眼信息：左眼和右眼的感受野配置文件相匹配的细胞，调整到水平方向的图像轮廓。 对于调节到垂直方向的神经元，左和右感受野主要不同。 因此，需要对视差处理的传统概念进行重大修改。 改进后的方案允许对单目形式和双眼视差信息进行统一编码。
BINOCULAR neurons in the visual cortex are thought to perform the first stage of processing for the fine stereoscopic depth discrimination exhibited by animals with frontally located eyes. Because lateral separation of the eyes gives a slightly different view to each eye, there are small variations in position (disparities), mainly along the horizontal dimension, between corresponding features in the two retinal images. The visual system uses these disparities to gauge depth. We studied neurons in the cat's visual cortex to determine whether the visual system uses the anisotropy in the range of horizontal and vertical disparities. We report here that there is a corresponding anisotropy in the cortical representation of binocular information: receptive-field profiles for left and right eyes are matched for cells that are tuned to horizontal orientations of image contours. For neurons tuned to vertical orientations, left and right receptive fields are predominantly dissimilar. Therefore, a major modification is required of the conventional notion of disparity processing. The modified scheme allows a unified encoding of monocular form and binocular disparity information.