title: Identification of neural circuits underlying P300 abnormalities in schizophrenia.
abstract: Event-related potentials (ERPs) provide a noninvasive method to evaluate neural activation and cognitive processes in schizophrenia. The pathophysiological significance of these findings would be greatly enhanced if scalp-recorded ERP abnormalities could be related to specific neural circuits and/or regions of the brain. Using quantitative approaches in which scalp-recorded ERP components are correlated with underlying neuroanatomy in schizophrenia, we focused on biophysical and statistical procedures (partial least squares) to relate the auditory P300 component to anatomic measures obtained from quantitative magnetic resonance imaging. These findings are consistent with other evidence that temporal lobe structures contribute to the generation of the scalp-recorded P300 component and that P300 amplitude asymmetry over temporal recording sites on the scalp may reflect anatomic asymmetries in the volume of the superior temporal gyrus in schizophrenia.
authors.affiliation: Department of Psychiatry, Harvard Medical School, Brockton, MA, USA. bodonnel@indiana.edu
authors.forename: B F
authors.initials: BF
authors.lastname: O'Donnell
authors.forename: R W
authors.initials: RW
authors.lastname: McCarley
authors.forename: G F
authors.initials: GF
authors.lastname: Potts
authors.forename: D F
authors.initials: DF
authors.lastname: Salisbury
authors.forename: P G
authors.initials: PG
authors.lastname: Nestor
authors.forename: Y
authors.initials: Y
authors.lastname: Hirayasu
authors.forename: M A
authors.initials: MA
authors.lastname: Niznikiewicz
authors.forename: J
authors.initials: J
authors.lastname: Barnard
authors.forename: Z J
authors.initials: ZJ
authors.lastname: Shen
authors.forename: D M
authors.initials: DM
authors.lastname: Weinstein
authors.forename: F L
authors.initials: FL
authors.lastname: Bookstein
authors.forename: M E
authors.initials: ME
authors.lastname: Shenton
mesh_terms: D001931:Brain Mapping / Q000379:methods*; D002540:Cerebral Cortex / Q000033:anatomy & histology / Q000503:physiopathology; D004594:Electrophysiology; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D016018:Least-Squares Analysis; D008959:Models, Neurological; D012559:Schizophrenia / Q000503:physiopathology*; D013702:Temporal Lobe / Q000503:physiopathology