A systematic map of direction preference in primary visual cortex
A systematic map of direction preference in primary visual cortex
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DOI：
10.1038/379725a0
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发表时间：
1996-02-22
期刊：
影响因子：
64.8
通讯作者：
Fitzpatrick, D
中科院分区：
文献类型：
--
作者：
Weliky, M;Bosking, WH;Fitzpatrick, D
初级视觉皮层中的神经元选择性地响应边缘的方向及其运动方向。方向偏好以系统的方式映射到皮质表面，使得相邻列中的神经元具有相似但略有偏移的偏好方向 (1-7)，微电极研究表明方向偏好也以系统的方式排列 (8-10)，但这种反应特性到底是如何映射的仍不清楚。在这里，我们通过雪貂皮层区域 17 中内在信号（6-7,11-14）的光学成像（4-5）显示，存在一个类似马赛克的方向偏好图，该图由许多区域组成，其中方向偏好以缓慢、连续的方式变化，这些区域由蜿蜒的边界（裂缝）分开，方向偏好在这些边界上突然变化，通常为 180 度。方向和方向偏好图的比较表明，这些裂缝将等方向域细分为区域对相反运动方向的选择性。
NEURONS in the primary visual cortex respond selectively to the orientation of edges and their direction of motion. Orientation preference is mapped in a systematic fashion across the cortical surface, such that neurons in adjacent columns have similar but slightly shifted preferred orientations(1-7), Microelectrode studies have suggested that direction preference is also arranged in a systematic fashion(8-10), but exactly how this response property is mapped remains unclear. Here we show by optical imaging(4-5) of intrinsic signals(6-7,11-14) in ferret cortical area 17 that there is a mosaic-like map of direction preference, This map consists of numerous regions within which direction preference changes in a slow, continuous fashion, These regions are separated by winding boundaries (fractures) across which direction preference shifts abruptly, often by 180 degrees, Comparison of direction and orientation preference maps shows that these fractures subdivide iso-orientation domains into regions selective for opposite directions of motion.