Frontotemporal hypoactivity during a reality monitoring paradigm is associated with delusions in patients with schizophrenia spectrum disorders

Christian Thoresen, Tor Endestad, Niels Petter B. Sigvartsen, Andres Server, Ingeborg Bolstad, Mikael Johansson, Ole A. Andreassen, Jimmy Jensen

Forskningsoutput: TidskriftsbidragArtikelPeer review

11 Citeringar (Scopus)

Sammanfattning

Introduction Impaired monitoring of internally generated information has been proposed to be one component in the development and maintenance of delusions. The present study investigated the neural correlates underlying the monitoring processes and whether they were associated with delusions. Methods Twenty healthy controls and 19 patients with schizophrenia spectrum disorders were administrated a reality monitoring paradigm during functional magnetic resonance imaging. During encoding participants were instructed to associate a statement with either a presented (viewed condition) or an imagined picture (imagined condition). During the monitoring session in the scanner, participants were presented with old and new statements and their task was to identify whether a given statement was associated with the viewed condition, imagined condition, or if it was new. Results Patients showed significantly reduced accuracy in the imagined condition with performance negatively associated with degree of delusions. This was accompanied with reduced activity in the left dorsolateral prefrontal cortex and left hippocampus in the patient group. The severity of delusions was negatively correlated with the blood-oxygenation-level dependent response in the left hippocampus. Conclusions The results suggest that weakened monitoring is associated with delusions in patients with schizophrenia spectrum disorder, and that this may be mediated by a frontotemporal dysfunction.

OriginalspråkEngelska
Sidor (från-till)97-115
Antal sidor18
TidskriftCognitive Neuropsychiatry
Volym19
Utgåva2
DOI
StatusPublicerad - 2014
Externt publiceradJa

Nationell ämneskategori

  • Psykologi (50101)

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