Chunk #39 — 4 Discussion — 4.2 EEG discriminating components during the P3 and around reaction time reveal a period of transition from externally driven task-related to internally-driven processing
Our superior LOC correlate is an expected finding, given its common association with visual attention (Murray and Wojciulik, 2003). However, similar regions have also been shown to couple with EEG components in the P3 time range for auditory tasks.Benar et al. (2007) linked the parieto-occipital junction to P3 modulations during an auditory oddball task. In our previous study that used an analogous auditory oddball paradigm and the same EEG discriminating component methods (Goldman et al., 2009), we also detected a correlate in the right LOC in the P3 range, but that cluster was located slightly inferior to our current finding. These collective findings suggest a supra-modal role for the LOC in attention.
