Chunk #40 — 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
An activation also appeared in right temporal fusiform cortex, an area commonly known to be involved in high-level visual processing.Bledowski et al. (2004b) also found that higher visual areas in inferior temporal gyrus contribute to the visual P3b, and their correlate appeared at similar latency. We also detected right-lateralized activations in auditory cortex. This co-activation of auditory and visual processing areas supports the presence of cross-modal attentional modulations, suggesting that modulations in auditory-directed attention (e.g. listening to scanner noise) affect attention to the visual modality.
