that oscillatory changes across different frequency bands afford a way to study and conceptualize binding of large-scale distributed representations during cognition that may underlie conscious experience in general (Basar, 2006; Dehaene and Changeux, 2011; Siegel et al., 2012). The oscillatory nature of the EEG and MEG signals makes them suitable for studying neuronal activity that is not necessarily phase-locked with the stimulus since synchronous changes across local neuronal envelopes are reflected in the amplitude of the signal (Pfurtscheller and Lopes da Silva, 1999; Buszaki, 2006; Nunez and Srinivasan, 2006). Furthermore, transient phase coherence between distant brain areas is an indicator of functional interactions of distributed areas (Lachaux et al., 1999).
