FIG. 3.

PSTHs of four units recorded in field PAF. Plot conventions are the same as in Fig. 1. A–B Responses of two units in the Idle condition showing suppressive responses to sounds. Maximum mean multiunit spike rates were 36.8 and 5.0 spikes/s based on 19–31 and 18–56 trials per location in A and B, respectively. C–D Responses of two units in the Localization condition recorded at sites separated by 600 μm along one probe placement. The units show complementary suppressive (C) and excitatory (D) responses with similar spatial preferences. Maximum mean multiunit spike rates were 12.3 and 13.7 spike/s based on 21–65 and 21–65 trials at each location in C and D, respectively.