Abstract
The inferior parietal lobule (IPL) has been considered to be a multimodal sensory association area. Both event-related potentials and magnetic responses have examined the relationships between IPL and cognitive processing. However, there have been no studies clarifying the functional subregions in IPL. We studied the event-related magnetic response during conventional auditory and visual oddball paradigms. We were able to distinguish non-invasively modality-specific subregions in IPL. The subregion in IPL activated by auditory target stimuli was located more anterior and superior than that responding to visual target stimuli on each hemisphere. The data suggests that modality-specific subregions in the IPL are differentially activated by auditory or visual stimuli.
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