Figure 7: Temporal interplay between excitation and suppression in awake cat’s AI. Temporal response patterns of 4 representative units (A: stimulus-un-locking unit; B-D: stimulus locking unit) triggered by a single click (arrow). The analysis was made on 35 single units that showed an appreciable spontaneous discharge rate for detecting suppression. Spike occurrence was displayed as raster dots (upper panels) and PSTH (10-ms bin width; lower panels). The threshold for excitation/ suppression was set at plus/minus 2*standard deviation of the mean spontaneous discharge rate (dotted line), respectively. Qualitatively distinct activities were aligned in the following sequence: only excitation (E; 1st column); excitation followed by suppression (“E-S sequence”; 2nd column); “E-S-E sequence” (3rd column); “E-S-E-S sequence” (4th column) (Modified from Sakai et al. [1]).