Fig. 2.

Latencies of excitation and suppression. A: 2 traces are the peak (strongest) and the trough (most suppressed) responses out of all combinations of SF and Δφ. The 2 traces are the same ones shown in Fig. 1B and 1D. Colored traces are the fits used to determine response latencies (bilinear functions). The suppressive response was delayed (green) compared with the peak response (magenta). B: peaks were positive and the troughs were negative in all the cells of the population (n = 50), indicating that all cells showed both excitatory and suppressive components. C: compares response latencies for excitation and suppression. The delay of the suppressive response was consistent across the population of V1 cells. The filled dots represent cells with significant difference in latency. We determined the significance of the peak difference when the 95% confidence interval of the joint values (an ellipse centered at the estimated latencies) did not cross the identity line (diagonal).