title: Late components of the event-related potentials and their topography in Parkinson's disease.
abstract: Late components of the event-related potential (ERP; N100, P200, N200, and P300) were elicited using an auditory oddball paradigm (with a button-press response to target stimuli) in 15 Parkinson's disease (PD) patients and 50 normal control subjects. Compared with control subjects, PD subjects showed a significant decrease in N200 amplitude. Between-group topographical differences in N200 amplitude were evident at central (C3, Cz, C4) and temporal (T5, T3, T4, T6) regions. The results may reflect a deficit in response selection in PD possibly resulting from a dysfunction associated with the abnormalities in the central and temporal regions found to have a decreased N200 amplitude compared with normal control subjects in this study.
authors.affiliation: Department of Neurology, Westmead Hospital, and University of Sydney, New South Wales, Australia.
authors.forename: J
authors.initials: J
authors.lastname: Lagopoulos
authors.forename: P
authors.initials: P
authors.lastname: Clouston
authors.forename: H
authors.initials: H
authors.lastname: Barhamali
authors.forename: E
authors.initials: E
authors.lastname: Gordon
authors.forename: W M
authors.initials: WM
authors.lastname: Li
authors.forename: J
authors.initials: J
authors.lastname: Lesley
authors.forename: J G
authors.initials: JG
authors.lastname: Morris
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D000368:Aged; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000503:physiopathology*; D004569:Electroencephalography; D018913:Event-Related Potentials, P300 / Q000502:physiology; D005071:Evoked Potentials / Q000502:physiology*; D005072:Evoked Potentials, Auditory / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000503:physiopathology*; D011930:Reaction Time / Q000502:physiology; D012016:Reference Values; D012815:Signal Processing, Computer-Assisted