Pattern of activation during delayed matching to sample task predicts functional outcome in people at ultra high risk for psychosis

I Falkenberg, I Valli, M Raffin, MR Broome, P Fusar-Poli, P Matthiasson, M Picchioni, P McGuire

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Background Clinical outcomes in people identified as at ultra-high risk (UHR) for psychosis are remarkably heterogeneous, and are difficult to predict on the basis of the presenting clinical features. Individuals at UHR are at risk of poor functional outcome regardless of development of psychotic disorder. The aim of the present study was to assess whether there is a relationship between functional neuroimaging measures at presentation and functional outcome as measured by the GAF three years after scanning. Methods Functional magnetic resonance imaging (fMRI) data were collected during an object working memory task in 34 ultra-high risk (UHR) subjects and 20 healthy controls. On the basis of their GAF scores at follow up, the UHR participants were divided into subgroups with good and poor functional outcomes, respectively. Results At baseline, the UHR group differed from controls in showing altered frontal and cuneus/posterior cingulate activation. Significant group x task interactions were found in the left cuneus and posterior cingulate gyrus, reflecting differential responses to the task conditions. Within the UHR sample, the subgroup with a poor functional outcome exhibited altered activation in frontal, temporal and striatal regions, and reduced deactivation within default-mode network regions, relative to those with a good outcome. Within the whole UHR sample, in these regions the local task response was correlated with the GAF score at follow up. Conclusions The findings suggest a potential role of functional neuroimaging in the prediction of outcomes in people at high clinical risk of psychosis.
Original languageEnglish
Pages (from-to)86-93
Number of pages8
JournalSchizophrenia Research
Volume181
Early online date29 Sep 2016
DOIs
Publication statusPublished - Mar 2017

Keywords

  • Default mode network
  • Psychosis
  • Working memory
  • Functional outcome
  • UHR
  • fMRI

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