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Schizophrenia is a complex psychiatric disorder characterized by a range of symptoms that significantly impact cognition, behavior, and emotional regulation. Among these, the positive symptoms stand out as they involve the addition or exaggeration of normal mental functions, deviating markedly from typical behavior and perception. Hallucinations and delusions are prominent positive symptoms, each profoundly affecting the individual's experience of reality.
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Why do delusions persist?

Philip R Corlett1, John H Krystal, Jane R Taylor

  • 1Department of Psychiatry, School of Medicine, Yale University New Haven, CT 06519 , USA. philip.corlett@yale.edu

Frontiers in Human Neuroscience
|July 29, 2009
PubMed
Summary
This summary is machine-generated.

Delusions persist because excessive prediction error repeatedly reconsolidates these false beliefs through memory reconsolidation. This neuroscientific model explains delusion persistence in mental illnesses.

Keywords:
delusionsextinctionhabitprediction errorreconsolidationsalience

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Science

Background:

  • Delusions are persistent, distressing beliefs central to certain mental illnesses.
  • Current models link delusion emergence to abnormal experiences.
  • Understanding delusion persistence requires extending these models.

Purpose of the Study:

  • To propose a neuroscientific model for understanding delusion persistence.
  • To highlight the role of prediction error and memory reconsolidation.

Main Methods:

  • Conceptual analysis integrating neuroscientific learning models with psychological theories of delusion.
  • Focus on prediction error as a key mechanism.

Main Results:

  • Excessive prediction error is proposed as central to delusion persistence.
  • Surprising experiences trigger memory reconsolidation, updating beliefs.
  • Repeated reconsolidation of delusional beliefs strengthens them.

Conclusions:

  • Delusional beliefs persist due to repeated reconsolidation driven by excessive prediction error.
  • This process renders delusions resistant to contradictory evidence.
  • The model offers a neuroscientific explanation for the tenacity of delusions.