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Smaller auditory P300 amplitude in schizophrenics in remission. 1995

K M Rao, and C V Ananthnarayanan, and B N Gangadhar, and N Janakiramaiah
Department of Psychiatry, NIMHANS, Bangalore, India.

The P300 event-related potential (ERP) was recorded using the auditory oddball paradigm in 12 (6 male) schizophrenic (DSM-IIIR) patients in rigorously defined clinical remission. The ERP was also recorded in 10 (5 male) age-, sex- and education-matched control subjects. ERP latencies and amplitude were measured at Cz and Pz recording sites. Mean latencies of the P300 in schizophrenic patients in remission at Cz [343.6 +/- 31 (SD) ms] and Pz (346.15 +/- 30 ms) did not differ from those of normals (Cz: 332.8 +/- 23 ms, Pz: 323 +/- 38 ms). The P300 ERP amplitude was significantly (p < 0.05) smaller in schizophrenics in remission at both Cz (9.2 +/- 4.4 microV) and Pz (8.8 +/- 4.4 microV) than in normals (Cz: 13.3 +/- 2.90 microV; Pz: 12.71 +/- 4.18 microV). The significance of the smaller auditory P300 amplitude in schizophrenia is discussed.

UI MeSH Term Description Entries
D008297 Male Males
D011569 Psychiatric Status Rating Scales Standardized procedures utilizing rating scales or interview schedules carried out by health personnel for evaluating the degree of mental illness. Factor Construct Rating Scales (FCRS),Katz Adjustment Scales,Lorr's Inpatient Multidimensional Psychiatric Rating Scale,Wittenborn Scales,Edinburgh Postnatal Depression Scale,Mini International Neuropsychiatric Interview
D012074 Remission Induction Therapeutic act or process that initiates a response to a complete or partial remission level. Induction of Remission,Induction, Remission,Inductions, Remission,Remission Inductions
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D012559 Schizophrenia A severe emotional disorder of psychotic depth characteristically marked by a retreat from reality with delusion formation, HALLUCINATIONS, emotional disharmony, and regressive behavior. Dementia Praecox,Schizophrenic Disorders,Disorder, Schizophrenic,Disorders, Schizophrenic,Schizophrenias,Schizophrenic Disorder
D018913 Event-Related Potentials, P300 A late-appearing component of the event-related potential. P300 stands for a positive deflection in the event-related voltage potential at 300 millisecond poststimulus. Its amplitude increases with unpredictable, unlikely, or highly significant stimuli and thereby constitutes an index of mental activity. (From Campbell, Psychiatric Dictionary, 6th ed) Evoked Potentials, P300 Component,P3 Event Related Potential,P300 Event-Related Potential,P300 Event-Related Potentials,Event-Related Potentials, P3,P3 Event-Related Potentials,P300 Component,P3a Event-Related Potentials,P3b Event-Related Potentials,Event Related Potentials, P3,Event Related Potentials, P300,Event-Related Potential, P3,Event-Related Potential, P300,Event-Related Potential, P3a,Event-Related Potential, P3b,Event-Related Potentials, P3a,Event-Related Potentials, P3b,P3 Event Related Potentials,P3 Event-Related Potential,P300 Components,P300 Event Related Potential,P300 Event Related Potentials,P3a Event Related Potentials,P3a Event-Related Potential,P3b Event Related Potentials,P3b Event-Related Potential

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