title: Spatiotemporal and frequency domain analysis of auditory paired stimuli processing in schizophrenia and bipolar disorder with psychosis.
abstract: Individuals with schizophrenia (SZ) or bipolar disorder with psychosis (BPP) may share neurophysiological abnormalities as measured in auditory paired-stimuli paradigms with electroencephalography (EEG). Such investigations have been limited, however, by quantifying only event-related potential peaks and/or broad frequency bands at limited scalp locations without considering possible mediating factors (e.g., baseline differences). Results from 64-sensor EEG collected in 180 age- and gender-matched participants reveal (i) accentuated prestimulus gamma oscillations and (ii) reduced P2 amplitudes and theta/alpha oscillations to S1 among participants with both SZ and BPP. Conversely, (iii) N1s in those with SZ to S1 were reduced compared to healthy volunteers and those with BPP, whereas (iv) beta range oscillations 200-300 ms following S2 were accentuated in those with BPP but not those with SZ. Results reveal a pattern of both unique and shared neurophysiological phenotypes occurring within major psychotic diagnoses.
authors.affiliation: Department of Psychology, University of Georgia, Athens, Georgia 30602-3013, USA.
authors.forename: Jordan P
authors.initials: JP
authors.lastname: Hamm
authors.forename: Lauren E
authors.initials: LE
authors.lastname: Ethridge
authors.forename: John R
authors.initials: JR
authors.lastname: Shapiro
authors.forename: Michael C
authors.initials: MC
authors.lastname: Stevens
authors.forename: Nashaat N
authors.initials: NN
authors.lastname: Boutros
authors.forename: Ann T
authors.initials: AT
authors.lastname: Summerfelt
authors.forename: Matcheri S
authors.initials: MS
authors.lastname: Keshavan
authors.forename: John A
authors.initials: JA
authors.lastname: Sweeney
authors.forename: Godfrey
authors.initials: G
authors.lastname: Pearlson
authors.forename: Carol A
authors.initials: CA
authors.lastname: Tamminga
authors.forename: Gunvant
authors.initials: G
authors.lastname: Thaker
authors.forename: Brett A
authors.initials: BA
authors.lastname: Clementz
mesh_terms: D000161:Acoustic Stimulation; D000293:Adolescent; D000328:Adult; D001307:Auditory Perception / Q000502:physiology; D001611:Beta Rhythm; D001714:Bipolar Disorder / Q000523:psychology*; D003627:Data Interpretation, Statistical; D039721:Diagnostic and Statistical Manual of Mental Disorders; D016002:Discriminant Analysis; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010641:Phenotype; D011618:Psychotic Disorders / Q000523:psychology*; D012565:Schizophrenic Psychology; D055815:Young Adult