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Reward anticipation in individuals with subclinical psychotic experiences: A functional MRI approach.

Accepted version
Peer-reviewed

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Type

Article

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Authors

Michielse, Stijn 
Lange, Iris 
Bakker, Jindra 
Goossens, Liesbet 
Verhagen, Simone 

Abstract

Previous research in patients with psychotic disorder has shown widespread abnormalities in brain activation during reward anticipation. Research at the level of subclinical psychotic experiences in individuals unexposed to antipsychotic medication is limited with inconclusive results. Therefore, brain activation during reward anticipation was examined in a larger sample of individuals with subclinical psychotic experiences (PE). Participants in the PE-group were included based on CAPE scores. A sample of emerging adults aged 16-26 years (n = 47) with PE and healthy controls (HC) (n = 40) underwent fMRI scanning. The Monetary Incentive Delay task was conducted with cues related to win, loss or neutral conditions. fMRI nonparametric tests were used to examine the reward versus neutral cue contrast. A significant main effect of the large win (€3.00) > neutral contrast was found in both groups showing activation in many brain areas, including classic reward regions. Whole brain analysis on the group comparison regarding the large win > neutral contrast showed significantly decreased activation in the right insula, putamen and supramarginal gyrus in the PE-group compared to controls. There was no group difference in the hypothesized reward-related region. Decreased activation in the right insula, putamen and supramarginal gyrus during reward anticipation in individuals with PE may be consistent with altered processing of sensory information, related to decreased emotional valuing and motivational tendencies and/or altered motor-cognitive processes. The absence of group differences in striatal activation suggests that activation here is intact in the earliest stages of psychosis and may exhibit progressive deterioration in as the disease develops.

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Keywords

Emerging adults, Mild psychopathology, Monetary reward, Reward anticipation, Subclinical psychotic experiences, fMRI, Anticipation, Psychological, Brain, Female, Humans, Magnetic Resonance Imaging, Male, Motivation, Psychomotor Performance, Psychotic Disorders, Reaction Time, Reward, Young Adult

Journal Title

Eur Neuropsychopharmacol

Conference Name

Journal ISSN

0924-977X
1873-7862

Volume Title

29

Publisher

Elsevier BV