Dopaminergic basis of salience dysregulation in psychosis

Toby T. Winton-Brown, Paolo Fusar-Poli, Mark A. Ungless, Oliver D. Howes

Research output: Contribution to journalReview ArticleResearchpeer-review

141 Citations (Scopus)

Abstract

Disrupted salience processing is proposed as central in linking dysregulated dopamine function with psychotic symptoms. Several strands of evidence are now converging in support of this model. Animal studies show that midbrain dopamine neurons are activated by unexpected salient events. In psychotic patients, neurochemical studies have confirmed subcortical striatal dysregulation of dopaminergic neurotransmission, whereas functional magnetic resonance imaging (fMRI) studies of salience tasks have located alterations in prefrontal and striatal dopaminergic projection fields. At the clinical level, this may account for the altered sense of meaning and significance that predates the onset of psychosis. This review draws these different strands of evidence together in support of an emerging understanding of how dopamine dysregulation may lead to aberrant salience and psychotic symptoms.

Original languageEnglish
Pages (from-to)85-94
Number of pages10
JournalTrends in Neurosciences
Volume37
Issue number2
DOIs
Publication statusPublished - Feb 2014
Externally publishedYes

Keywords

  • Dopamine
  • Psychosis
  • Reward
  • Salience
  • Schizophrenia

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