Figure 3.

Gamma band activity during retrieval of face–location associations. (a) The topography (circular plot; f = 60–140 Hz) and TFRs of the grand-average gamma power for both conditions. The TFRs were averaged over the encircled channels. For visualization of the task related effect, gamma power is shown relative to a baseline period (t = −1.4 to −0.1 s). Note that the increase in gamma power is broadbanded and sustained. (b) Source level gamma power (f = 60–140 Hz, t = 0 to 1.5 s) was significantly increased compared with baseline (t = −1.5 to 0 s) in occipital, parietal, posterior temporal, and motor areas in both conditions. The increase was significant on group level (corrected for multiple comparisons).