期刊
CLINICAL NEUROPHYSIOLOGY
卷 111, 期 5, 页码 833-836出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/S1388-2457(99)00313-2
关键词
event-related potentials; superior temporal plane; primate; NMDA receptors
资金
- NIDA NIH HHS [R01 DA03383] Funding Source: Medline
- NIMH NIH HHS [K02 MH01439, R01 MH55620] Funding Source: Medline
Objectives: The amplitude of the cortically generated auditory event-related potential (ERP) components P1 and N1 decreases as the interval between successive stimuli (ISI) decreases. Although the phenomenon of P1 and N1 refractoriness is well established, the underlying mechanisms are poorly understood. The present study investigates P1 and N1 refractoriness in the awake monkey in order to investigate underlying mechanisms. Methods: Auditory ERP were obtained in response to repetitive auditory stimuli presented at 5 levels of ISI between 150 ms and 9 s, prior to and following administration of the selective N-methyl-D-aspartate (NMDA) antagonist phencyclidine (PCP). Results: P1 and N1 amplitude declined in monkeys with decreasing ISI, with similar temporal characteristics to that observed in humans. PCP inhibited pi and N1 generation at long, but not short, ISI producing a pattern similar to that recently observed in schizophrenic subjects. Conclusions: The present findings suggest that the primate P1/N1 model may be useful for investigating mechanisms underlying impaired information processing in schizophrenia, and that NMDA receptor dysfunction may play a key role in information processing dysfunction associated with schizophrenia. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.
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