Fig. 10.

Temporal weighting functions for all red–green opponent parvocellular neurons (A–D) and S-cone-dominated neurons (E, F). For each cell type three or four sets of temporal weighting functions are plotted separately for both center (top) and surround (bottom); L-cone, M-cone, luminance, and, for some cells, S-cone responses are shown. For each cell all weighting functions are normalized by the same value. Red–green responses are normalized by the peak of the center response for the center cone type (L cone in A, B; M cone in C, D). S-on/L-off responses (E) are normalized by the S-cone surround peak (which was stronger than the S center). S-off responses (F) are normalized by the S-cone center. Data from four neurons that gave the weakest responses [normalization value <3.0 (spikes/sec)/(unit contrast)] are plotted in gray. Note that for red–green neurons the center cone types (L cone, A, B; M cone,C, D) have the same sign responses in the center and surround (with only two clear exceptions, shown byarrows). The luminance responses, however, have opposite signs in the center and surround.