Smith R G, Sterling P
Department of Anatomy, School of Medicine, University of Pennsylvania, Philadelphia.
Vis Neurosci. 1990 Nov;5(5):453-61. doi: 10.1017/s0952523800000572.
The receptive-field profile of the cone in cat-retina was computed. The computation was based on (1) the known anatomical circuit connecting cones via narrow-field bipolar cells to the on-beta ganglion cell; (2) the known physiological receptive-field profile of the on-beta (X) cell at the corresponding eccentricity; and (3) a model in which the beta receptive field arises by linear superposition of cone receptive fields. The computed cone receptive field has a center/surround organization with a center almost as broad as that of the beta cell center. The cone surround is comparably broad to that of the beta cell but somewhat lower in peak amplitude. The problems to which the center/surround receptive field are the solution, namely, signal compression and noise reduction, apparently must be solved before the first synapse of the visual pathway.
计算了猫视网膜中视锥细胞的感受野轮廓。该计算基于：（1）已知的通过窄场双极细胞将视锥细胞连接到β-ON神经节细胞的解剖学回路；（2）在相应离心率下β-ON（X）细胞已知的生理感受野轮廓；以及（3）一个模型，其中β感受野通过视锥细胞感受野的线性叠加产生。计算出的视锥细胞感受野具有中心/外周组织，其中心几乎与β细胞中心一样宽。视锥细胞外周与β细胞外周相当宽，但峰值幅度略低。中心/外周感受野所解决的问题，即信号压缩和噪声降低，显然必须在视觉通路的第一个突触之前得到解决。
