Early EEG windows resulted in right-lateralized activations in brain regions associated with taskrelevant neural processes (Figure 4). These included frontal activations in DLPFC and posterior SFG, which are most commonly associated with working memory and higher-level cognitive processing during demanding tasks (Fuster, 2001; MacDonald et al., 2000), and the superior LOC. These areas have been linked to P3 modulations and are discussed further in Section 4.2, which focuses on components in that time range. To the best of our knowledge, BOLD correlates of variability in the early P2 and N2 ERP components have not been studied in the visual domain; however,Eichele et al. (2005) found correlates of auditory oddball N2 variability in both of these areas at similar latencies. Using a visual target detection task,Novitskiy et al. (2011) found these regions correlated with variability in the even earlier N1 component, but their activations were left-lateralized.
