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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Spatial organization of retinal information about the direction of image motion.
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Spatial organization of retinal information about the direction of image motion.

机译：有关图像运动方向的视网膜信息的空间组织。

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The visual stimuli that elicit neural activity differ for different retinal ganglion cells and these cells have been categorized by the visual information that they transmit. If specific visual information is conveyed exclusively or primarily by a particular set of ganglion cells, one might expect the cells to be organized spatially so that their sampling of information from the visual field is complete but not redundant. In other words, the laterally spreading dendrites of the ganglion cells should completely cover the retinal plane without gaps or significant overlap. The first evidence for this sort of arrangement, which has been called a tiling or tessellation, was for the two types of "alpha" ganglion cells in cat retina. Other reports of tiling by ganglion cells have been made subsequently. We have found evidence of a particularly rigorous tiling for the four types of ganglion cells in rabbit retina that convey information about the direction of retinal image motion (the ON-OFF direction-selective cells). Although individual cells in the four groups are morphologically indistinguishable, they are organized as four overlaid tilings, each tiling consisting of like-type cells that respond preferentially to a particular direction of retinal image motion. These observations lend support to the hypothesis that tiling is a general feature of the organization of information outflow from the retina and clearly implicate mechanisms for recognition of like-type cells and establishment of mutually acceptable territories during retinal development.
机译：对于不同的视网膜神经节细胞，引起神经活动的视觉刺激有所不同，并且这些细胞已经根据它们传递的视觉信息进行了分类。如果特定的视觉信息是专门或主要由特定的神经节细胞集合传达的，则人们可能希望这些细胞在空间上组织起来，以便它们对来自视场的信息的采样是完整的，但不是多余的。换句话说，神经节细胞的侧向分布的树突应完全覆盖视网膜平面，而无间隙或明显重叠。这种排列方式（称为平铺或镶嵌）的第一个证据是猫视网膜中的两种类型的“α”神经节细胞。神经节细胞平铺的其他报道随后也有报道。我们已经发现了针对兔子视网膜中传递有关视网膜图像运动方向信息的四种神经节细胞（ON-OFF方向选择性细胞）的特别严格的平铺的证据。尽管四组中的单个细胞在形态上是无法区分的，但它们被组织为四个重叠的图块，每个图块由优先响应视网膜图像运动特定方向的类似类型的细胞组成。这些观察结果支持以下假说：平铺是视网膜信息流出组织的一般特征，并且清楚地暗示了在视网膜发育过程中识别相似类型的细胞和建立相互接受的领土的机制。

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