The faster synchronization in Go trials may be related to the faster decoding or detection of target stimulus (Go) as compared with non-target stimulus (NoGo) and the triggering subsequent response execution, whereas the slower but lasting-on synchronization in the case of the non-target stimulus is apparently related to the slower decoding of this stimulus and triggering the response inhibition. As shown by global or average coherence, these tendencies in NoGo as compared with Go trials are supported predominantly by frontal networks. Furthermore, analyses of phase coherence across separate electrode pairs showed strong differences between Go and NoGo trials not only in local frontal networks (e.g., neighboring electrode pairs such as F3-C3, F4-C4) but also in global larger scale fronto-parietal (e.g., F3-P3 or F4-P4) and/or interhemispheric (e.g., F3-F4) connections. It means that synchronization pattern in the NoGo condition as compared to the Go condition is not only related to anterior regions but also involves long-range connections to parietal regions, as well as interhemispheric connections.
