The ERP components, such as P3 and N2, that are obtained by averaging procedures in the time domain, are not unitary neuroelectric phenomena elicited during cognitive processing, but consist of the simultaneous oscillatory activity of different frequencies that are generated by multiple sources within the brain with contributions from frontal cortex (including anterior cingulate), parietal cortex, and hippocampus (Halgren et al., 1995a, Halgren et al., 1995b, Halgren et al., 1980, Menon et al., 2001). Averaged sensory evoked potential waveforms have been shown to develop from the phase resetting of the ongoing EEG oscillations with different frequencies as well as modulation of their amplitude (cited from Muller and Anokhin, 2012). Similarly, recent research using advanced methods for time-frequency analysis of event-related oscillations (EROs) has provided evidence that ERP waveforms can be at least partially accounted for by phase resetting of EEG oscillations (Freunberger et al., 2007, Freunberger et al., 2008, Gruber et al., 2005, Klimesch et al., 2007, Klimesch et al., 2004, Sauseng and Klimesch, 2008, Yeung et al., 2004, Yeung et al., 2007). It has also been demonstrated that averaged
