Brain Indicators of Altered Attention and Information Processing in Schizophrenic Patients

Late components of brain event-related potentials reflect aspects of selective attention, stimulus evaluation, and possibly memory update mechanisms. Several of these components were measured during an auditory target detection task, performed by 20 schizophrenic and 20 normal subjects. Both the amp...

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Bibliographic Details
Published in:British journal of psychiatry 1986-04, Vol.148 (4), p.414-420
Main Authors: Barrett, K., McCallum, W. C., Pocock, P. V.
Format: Article
Language:English
Subjects:
Acoustic Stimulation
Adult
Attention
Biological and medical sciences
Brain - physiopathology
Cognition
Electroencephalography
Humans
Male
Medical sciences
Middle Aged
Miscellaneous
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Schizophrenia - physiopathology
Schizophrenic Psychology
Techniques and methods
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Summary:Late components of brain event-related potentials reflect aspects of selective attention, stimulus evaluation, and possibly memory update mechanisms. Several of these components were measured during an auditory target detection task, performed by 20 schizophrenic and 20 normal subjects. Both the amplitude of those components and a more general late amplitude measure were significantly reduced in schizophrenics, for both target and non-target stimuli. One general late amplitude measure, from the scalp vertex, could alone correctly classify 85% of patients and 95% of controls. The source of these differences may lie in a protracted positive potential shift.
ISSN:0007-1250
1472-1465
DOI:10.1192/bjp.148.4.414