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Influence of duration of untreated psychosis on auditory P300 in drug-naive and first-episode schizophrenia.

Abstract：

:P300 amplitude reduction in schizophrenia is, according to previous studies, partially recovered by treatment with neuroleptics. However, whether this medication-induced P300 recovery is associated with duration of untreated psychosis (DUP) remains unreported; the present study is a preliminary examination of this question. Auditory P300 was recorded from 18 drug-naive and first-episode schizophrenia patients, among whom 10 were identified as short DUP, and eight as long DUP. Follow-up event-related potential tests were carried out after treatment with haloperidol or bromperidol for approximately 2 months. Recovery of P300 amplitude was replicated after neuroleptic medication was administered. A significant interaction was found between DUP and the medication effect in P300 amplitude over the left temporo-parietal area; a significant P300 recovery was seen in short DUP but not in long DUP. These results suggest that first-episode schizophrenia patients with long DUP might have severe impairments in the left temporal structures, supporting DUP as a key variable in future neurobiological studies of first-episode schizophrenia.

journal_name

Psychiatry Clin Neurosci

journal_title

Psychiatry and clinical neurosciences

authors

Wang J,Hirayasu Y,Hokama H,Tanaka S,Kondo T,Zhang M,Xiao Z

doi

10.1111/j.1440-1819.2005.01360.x

subject

Has Abstract

pub_date

2005-04-01 00:00:00

pages

209-14

issue

2

eissn

1323-1316

issn

1440-1819

pii

PCN1360

journal_volume

59

pub_type

临床试验,杂志文章

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