“…More recently, simultaneous EEG/ fMRI has been successfully applied to investigate cognitive phenomena such as performance monitoring (Debener et al, 2005) and sustained attention (Eichele et al, 2005). Apart from epilepsy research most studies have focused on the BOLD correlates of ongoing oscillatory activity during resting state (i.e., recorded while the subject was quietly lying in the scanner, with no explicit task), focusing on the posterior alpha rhythm and, to a lesser extent, the beta rhythm (Feige et al, 2005;Goldman et al, 2002;Goncalves et al, 2006;Laufs et al, 2006Laufs et al, , 2003aMoosmann et al, 2003). In these studies, the general idea has been that spontaneous fluctuations in the amplitude of a given oscillatory signal can be correlated with spontaneous fluctuations in the BOLD signal.…”