期刊
AUDIOLOGY AND NEURO-OTOLOGY
卷 5, 期 3-4, 页码 207-215出版社
KARGER
DOI: 10.1159/000013882
关键词
auditory potentials; event-related potentials; cognition; cortex; N-methyl-D-aspartate receptors; glutamate; psychosis; mismatch negativity (MMN)
资金
- NIMH NIH HHS [R01 MH55620, R01 MH49334, K02 MH01439] Funding Source: Medline
Event-related potentials provide an objective index of neurocognitive dysfunction in schizophrenia. Schizophrenia subjects show a decreased mismatch negativity (MMN) amplitude relative to age- and sex-matched controls, along with a characteristic pattern of MMN dysfunction across conditions. Deficits in MMN generation are accompanied by (1) impaired precision of auditory sensory memory performance and (2) an interstimulus-interval-dependent deficit in auditory N-1 generation. Similar deficits are observed following systemic or local infusion of N-methyl-D-aspartate (NMDA) antagonists, supporting glutamatergic and phencyclidine/NMDA models of the disorder. Deficits in MMN generation may also be seen following focal cortical damage, especially to the dorsolateral prefrontal cortex. MMN thus provides a useful tool for investigating mechanisms underlying brain dysfunction in schizophrenia. Copyright (C) 2000 S. Karger AG, Basel.
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