Shapley R, Victor J
Science. 1986 Feb 28;231(4741):999-1002. doi: 10.1126/science.3945816.
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.
猫的X型视网膜神经节细胞只能分辨每度2.5周的正弦光栅，但仍能可靠地对约1分视角的光栅位移做出反应。这是一种超敏锐度形式，其程度与人类视觉中所见的相当。对这种超敏锐度形式的理论分析表明，它是神经节细胞高增益和低噪声的结果。最佳视网膜神经节细胞预期的超敏锐度比行为实验中观察到的要好得多。因此，大脑无法利用单个神经节细胞反应中存在的所有超敏锐度信息，而不是通过汇集来自许多神经节细胞的信号来提高视网膜的信噪比。
