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Longitudinal alterations in motivational salience processing in ultra-high-risk subjects for psychosis

Schmidt, André and Antoniades, Mathilde and Allen, Paul and Egerton, Alice and Chaddock, Christopher A. and Borgwardt, Stefan and Fusar-Poli, Paolo and Roiser, Jonathan P. and Howes, Oliver and McGuire, Philip. (2017) Longitudinal alterations in motivational salience processing in ultra-high-risk subjects for psychosis. Psychological medicine, 47 (2). pp. 243-254.

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Official URL: https://edoc.unibas.ch/64992/

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Abstract

Impairments in the attribution of salience are thought to be fundamental to the development of psychotic symptoms and the onset of psychotic disorders. The aim of the present study was to explore longitudinal alterations in salience processing in ultra-high-risk subjects for psychosis.; A total of 23 ultra-high-risk subjects and 13 healthy controls underwent functional magnetic resonance imaging at two time points (mean interval of 17 months) while performing the Salience Attribution Test to assess neural responses to task-relevant (adaptive salience) and task-irrelevant (aberrant salience) stimulus features.; At presentation, high-risk subjects were less likely than controls to attribute salience to relevant features, and more likely to attribute salience to irrelevant stimulus features. These behavioural differences were no longer evident at follow-up. When attributing salience to relevant cue features, ultra-high-risk subjects showed less activation than controls in the ventral striatum at both baseline and follow-up. Within the high-risk sample, amelioration of abnormal beliefs over the follow-up period was correlated with an increase in right ventral striatum activation during the attribution of salience to relevant cue features.; These findings confirm that salience processing is perturbed in ultra-high-risk subjects for psychosis, that this is linked to alterations in ventral striatum function, and that clinical outcomes are related to longitudinal changes in ventral striatum function during salience processing.
Faculties and Departments:03 Faculty of Medicine > Bereich Psychiatrie (Klinik) > Erwachsenenpsychiatrie UPK
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Psychiatrie (Klinik) > Erwachsenenpsychiatrie UPK
UniBasel Contributors:Schmidt, André
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Cambridge University Press
ISSN:0033-2917
e-ISSN:1469-8978
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:08 Jan 2019 15:34
Deposited On:15 Aug 2018 15:58

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