post-stimulus time interval (0-300 ms). On the other hand, PLI for the NoGo condition was stronger compared to the Go condition at frontocentral sites during the second post-stimulus time interval (300-600). Another study using a cued Go/NoGo task found stronger inter-trial coherence (ITC) in the NoGo compared to the Go condition at theta frequency during the time interval between 200-600 ms after stimulus onset (Schmiedt-Fehr and Basar-Eroglu, 2011). The results of these studies are suggestive of anteriorization of transient increases in neural synchrony while suppressing a motor response, as well as its relatively later occurrence in mental chronometry compared to executing a motor response. It is to be noted here that measures such as PLI and ITC used in both studies are similar and are the means by which event-locked evoked power for the various frequencies, (the dependent measure used in the present study), are calculated.
