Fig 1. Changes in individual RGC feature selectivities are consistent with a switch between rod and cone dominated circuitry.

A. Color-dependent STA for a sample ganglion cell (Experiment #1). Lighter shades measured in the light condition. Red, green and blue colors correspond to the monitor gun. B. Projections of the ganglion cell color profiles onto the red rod (z_i,r) on the y-axis plotted versus the projection onto the green cone (z_i,g) for N = 111 ganglion cells (see Supplement); dark blue dots for the dark, light blue dots for light condition. Absolute values are used to provide invariance to the sign of the color vector (ON- vs. OFF-type cells). The rod-cone overlap (similarity of the two photopigments) is plotted as red squares. C. The distribution of the rod-cone spectral separations (see Supplement), plotted for the dark (dark blue) and light (light blue) conditions. D. Responses of a sample ganglion cell to repeated presentations of the same stimulus segment, in the two conditions. E. Auto- and cross-correlations of spike trains for the cell in panel D, calculated excluding spikes from the same trial; dark-dark auto-correlation (dark blue), light-light auto-correlation (light blue), dark-light cross-correlation (black). These are normalized by the probability of a spike, so that this measure tends to 1 at long time shifts. F. Distribution over ganglion cells of the reproducibility (see main text) of spikes across light adapted conditions, with an arrow indicating the sample cell in D,E.