Fig. 10
From: Neural sensitization improves encoding fidelity in the primate retina
Background motion evokes adaptation in parasol cells and sensitization in midget cells. a Averages spike rate as a function of time for an Off parasol ganglion cell a stationary texture followed by a series of test flashes centered over the cell’s receptive field (left) or following the offset of texture motion (right; speed, 11 degrees s–1). b Contrast-response functions for the cell in (a) for the measurements with a stationary texture (red) or a moving texture (black). c Sensitivity metrics for this experiment across 10 parasol cells. d Spike responses from an Off midget ganglion cell to the same experimental protocol. e Average spike rate across the shaded regions indicated in (d). The wide-field adaptation evoked a leftward shift in the contrast-response curve (black) relative to the unadapted control condition (red). f Sensitivity values for the motion experiment across 12 midget cells. Motion produced a significant increase in sensitivity at low contrast relative to the stationary condition (contrast, ≤50%; p < 0.05; Wilcoxon signed rank test). Circles and bars indicate mean ± SEM
