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Integrating schizophrenia

J A Gray1

  • 1Department of Psychology, Institute of Psychiatry, London, United Kindgom.

Schizophrenia Bulletin
|June 5, 1998
PubMed
Summary
This summary is machine-generated.

Disrupted latent inhibition, a cognitive process, is linked to psychosis in schizophrenia. Dopamine in the brain

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Area of Science:

  • Neuropsychology
  • Psychiatry
  • Neuroscience

Background:

  • Schizophrenia's positive symptoms are complex.
  • J.A. Gray et al. proposed a neuropsychological theory.
  • Latent inhibition (LI) is a form of learning that may be impaired in schizophrenia.

Purpose of the Study:

  • To review the neuropsychological theory of schizophrenia proposed by J.A. Gray et al.
  • To evaluate subsequent evidence related to latent inhibition and psychosis.
  • To discuss the implications for understanding schizophrenia.

Main Methods:

  • Review of existing studies on latent inhibition.
  • Examination of evidence from clinical populations, healthy volunteers, and animal models (rats).
  • Analysis of the role of dopamine and hippocampal projections in latent inhibition.

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Main Results:

  • Disrupted latent inhibition is clearly associated with psychosis.
  • Evidence suggests dopamine release in the nucleus accumbens provokes LI disruption.
  • Dopamine blockade potentiates LI; hippocampal projections are also involved.

Conclusions:

  • The theory of schizophrenia proposed by J.A. Gray et al. is broadly supported by recent findings.
  • Disrupted latent inhibition may be a marker for psychosis, but its status as a state or trait marker requires further investigation.
  • The findings contribute to a model of schizophrenia involving consciousness and positive psychotic symptoms.