Functional MRI study of auditory and visual oddball tasks

To seek neural sources of endogenous event-related potentials, brain activa tions related to rare target stimuli detection in auditory and visual oddba ll tasks were imaged using a high temporal resolution functional MRI techni que. There were multiple modality specific and modality non-specific activa tions. Auditory specific activations were seen in the bilateral transverse temporal gyri and posterior superior temporal planes while visual specific activations were seen in the bilateral occipital lobes and their junctions with the temporal lobes. Modality non-specific activations were seen in mul tiple areas including the bilateral parietal and temporal association areas , bilateral prefrontal cortex, bilateral premotor areas, bilateral suppleme ntary motor areas and anterior cingulate gyrus. Results were consistent wit h previous intracranial evoked potential recording studies, and supported t he multiple generator theory of the endogenous event-related potentials. Ne uroReport 10:1683-1688 (C) 1999 Lippincott Williams & Wilkins.