State and trait markers of emotionally charged visual event-related potentials (P300) in drug-naïve schizophrenia.

Abstract:

AIM:In the present study, we investigated the changes in P3 component in the emotionally charged visual event-related potentials (ERP) in 30 drug-naïve schizophrenic patients for up to 1 year. METHODS:Visual oddball event-related potential was recorded from six recording sites for crying baby or smiling baby photographs. ERP were recorded before the treatment (session 1 [S1]), after 3 months (session 2 [S2]), and after 12 months (session 3 [S3]), as well as in 30 healthy subjects. RESULTS:Before taking medicine, there were no significant differences in the P300 amplitude between viewing photographs of a crying and a smiling baby. The P300 amplitude was significantly larger at S2 and S3 than at S1 for a crying baby, while there was no significant difference among sessions for a smiling baby after medication. A significant difference of the P300 amplitude was only observed between S3 and healthy subjects for a smiling baby. The P300 latency only when viewing a smiling face became significantly longer at S3 than those at S1 and S2. A significant negative correlation was obtained between the P300 amplitude changes upon viewing crying faces and negative syndrome score changes at the Pz site. CONCLUSION:The P300 amplitude induced by crying-face stimuli may be a state marker and the P300 amplitude caused by smiling-face stimuli may be a trait marker during recovery in schizophrenic patients. Atypical antipsychotic medications may be useful and may recover cognitive function reflected by the emotionally charged visual P300 components in schizophrenic patients.

authors

Mori K,Morita K,Shoji Y,Matsuoka T,Fujiki R,Uchimura N

doi

10.1111/j.1440-1819.2012.02345.x

subject

Has Abstract

pub_date

2012-06-01 00:00:00

pages

261-9

issue

4

eissn

1323-1316

issn

1440-1819

journal_volume

66

pub_type

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