Figure 3. Large-scale delta- and gamma-band synchronization characterizes neuronal processing of perceived but not unperceived stimuli. (A) Time-frequency representations of the extent of significant interareal synchronization as estimated with PLV for perceived (Hit) stimuli, unperceived (Miss), as well as for their difference (Hit-Miss) compared with the prestimulus baseline (N = 12) (Wilcoxon signed-ranked test, p < 0.05, corrected for multiple comparisons). Sustained gamma-band (40–60 Hz) synchronization and delta/theta- (δ/θ, 3–7 Hz) band synchronization were stronger for Hits than Misses. The color indicates the connection densities of positive (K+) and negative (K−) observations, that is, the fractions of connections with a statistically significant positive or negative difference from the baseline level, respectively. (B) Time-frequency representations of the extent of significant interareal synchronization as estimated with iPLV.