Figure 7.

Fine structure in receptive fields of ON-OFF PACs. A, B, Receptive fields measured at high resolution are shown for three simultaneously recorded PACs and OFF parasol cells, revealing greater circular symmetry in parasol cells and irregular radial flares in the receptive fields of PACs. The display of the peak amplitude is saturated to improve the visibility of flares. Scale bar, 200 μm. C, Smoothed, thresholded, and superimposed receptive fields of eight PACs suggests coordination in the receptive field microstructure of adjacent cells. Arbitrary coloring of the green cell for visual clarity. Scale bar, 200 μm.