Figure 2 shows time-frequency diagrams of averaged PC for Go and NoGo conditions as well as differences between conditions. The right panel of Figure 2 shows scalp maps of PC between all individual electrodes. Similar time-frequency diagrams and brain maps for Warning and Neutral conditions are shown in supplemental Figure S2. In general, synchronization was stronger in Go and NoGo conditions compared with Warning and especially Neutral conditions (compare Fig. 2 and Fig. S2). Like PLI, average PC across Go as compared with NoGo trials was higher at the first time interval (T1), especially parietal, whereas average PC in NoGo condition as compared with Go condition was enhanced in the second time interval (T2) reflecting an increase in long-distance, particularly fronto-parietal, connections. Nonetheless, the brain maps of coherence differences between NoGo and Go trials indicate stronger involvement of frontal networks in NoGo as compared with Go trials, especially in the delta frequency band.
