Ganglion cell spike trains during random bar motion.

<p><b>A:</b> Position of the bar as a function of time. <b>B:</b> Example of one stimulus frame; motion is perpendicular to the bar (red arrow). Ellipse fitted to the spatial receptive field profile of one representative ganglion cell (pink). <b>C:</b> Spiking activity of 180 cells in the guinea-pig retina in response to a bar moving randomly with the trajectory shown in A. Each line corresponds to one cell, and the points represent spikes. The order of the cells along the y-axis is arbitrary. <b>D:</b> Spiking activity of 123 cells in the salamander retina responding to a bar moving randomly. Same convention as <b>C</b>.