Hyperacuity in cat retinal ganglion cells.
Hyperacuity in cat retinal ganglion cells.
复制标题
猫视网膜神经节细胞的超敏度。
DOI：
10.1126/science.3945816
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发表时间：
1986
期刊：
影响因子：
--
通讯作者：
Victor,J
中科院分区：
文献类型：
--
作者：
Shapley,R;Victor,J
猫X视网膜神经节细胞，可以解决只有2.5周期每度的正弦光栅，但可以可靠地响应约1弧分光栅的位移。这是一种超敏的形式，其量级与人类视觉中所见的相当。对这种形式的超视敏度的理论分析表明，它是神经节细胞的高增益和低噪声的结果。预期最好的视网膜神经节细胞的超敏度比在行为实验中观察到的要好得多。因此，大脑不能通过汇集来自许多神经节细胞的信号来改善视网膜信噪比，而是无法利用单个神经节细胞反应中存在的所有超敏信息。
Cat X retinal ganglion cells that can resolve sine gratings of only 2.5 cycles per degree can nevertheless respond reliably to displacements of a grating of approximately 1 minute of arc. This is a form of hyperacuity comparable in magnitude to that seen in human vision. A theoretical analysis of this form of hyperacuity reveals it to be a result of the high gain and low noise of ganglion cells. The hyperacuity expected for the best retinal ganglion cells is substantially better than that observed in behavioral experiments. Thus the brain, rather than improving on the retinal signal-to-noise ratio by pooling signals from many ganglion cells, is unable to make use of all the hyperacuity information present in single ganglion cell responses.