THE PRIMATE RETINA CONTAINS 2 TYPES OF GANGLION-CELLS, WITH HIGH AND LOW CONTRAST SENSITIVITY
THE PRIMATE RETINA CONTAINS 2 TYPES OF GANGLION-CELLS, WITH HIGH AND LOW CONTRAST SENSITIVITY
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DOI：
10.1073/pnas.83.8.2755
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发表时间：
1986-04-01
影响因子：
11.1
通讯作者：
SHAPLEY, RM
中科院分区：
文献类型：
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作者：
KAPLAN, E;SHAPLEY, RM
此前，我们发现猴外侧膝状核(LGN)两层大细胞(大细胞)中的宽带细胞比四层小细胞(小细胞)中的颜色敏感细胞对亮度对比度更敏感。我们现在报道，这种对比敏感度的巨大差异不是由于LGN回路，而是为LGN神经元提供兴奋性突触输入的视网膜神经节细胞的敏感性差异。这意味着视觉场景中对颜色和亮度的平行分析始于视网膜，可能是在神经节细胞远端的视网膜部位。
Previously, we discovered that the broad-band cells in the two magnocellular (large cell) layers of the monkey lateral geniculate nucleus (LGN) are much more sensitive to luminance contrast than are the color-sensitive cells in the four parvocellular (small cells) layers. We now report that this large difference in contrast sensitivity is due not to LGN circuitry but to differences in sensitivity of the retinal ganglion cells that provide excitatory synaptic input to the LGN neurons. This means that the parallel analysis of color and luminance in the visual scene begins in the retina, probably at a retinal site distal to the ganglion cells.