processing (Hickok and Poeppel, 2007; Burton, 2009). Furthermore, it is activated across both visual and auditory modalities, suggesting a supramodal role in lexical access (Heim et al., 2007). During a lexical decision task each new stimulus has to be evaluated for its phonological and semantic “verity.” The parallel engagement of the anterior and posterior prefrontal cortices observed in the present study is consistent with BOLD–fMRI studies. Nonetheless, our results indicate that in all lateral temporo-prefrontal areas, greater event-related theta is associated with real words and successful semantic retrieval, reinforcing the idea that theta power may reflect the binding of distributed representations (Siegel et al., 2012). EEG theta power estimates (Figure 5) lack the spatial dimension provided by aMEG, but they correspond with the main findings inasmuch as the AN elicited the strongest theta power, followed by SW. In contrast, very little EEG theta was elicited by PW, consistent with the idea that theta is primarily sensitive to the outcome of semantic retrieval (Bastiaansen and Hagoort, 2006).
