In addition to time-domain measures, time-frequency approaches have also been implemented with ERP data from go/no-go tasks, although the information is relatively scarce. Reports have documented increased mid-frontal theta-band activity during demands of response inhibition (Yamanaka and Yamamoto, 2009; Barry, 2009; Kamarajan et al., 2004; Kamarajan et al., 2006; Kirmizi-Alsan et al., 2006), indicating that theta activity may reflect inhibitory processes. In line with findings indicating that joint theta and delta activity underlies several ERP components (Başar et al., 1999; Karakas et al., 2000a, 2000b), some studies report delta-band activity underlying the nogo N2 and P3 responses, with the delta-no-go activity having a more central topographic distribution compared to delta-go data (Barry, 2009; Kirmizi-Aslan et al., 2006; Kamarajan et al., 2004; Kamarajan et al., 2006). Recently, Müller and Anokhin (2012) reported increased inter-electrode phase coherence in both theta and delta between F3-F4, indicative of functional integration between bilateral prefrontal channels during response inhibition.
