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Structural and functional brain changes in delusional disorder.

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Brain imaging reveals structural and functional abnormalities in delusional disorder, specifically in the medial frontal/anterior cingulate cortex and insula. These findings suggest these brain regions play a role in the development of delusions.

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Area of Science:

  • Neuroimaging
  • Psychiatry
  • Neurology

Background:

  • Delusional disorder is under-researched using brain imaging techniques.
  • Limited understanding of the neurobiological underpinnings of delusional disorder.

Purpose of the Study:

  • To investigate structural and functional brain abnormalities in patients with delusional disorder.
  • To identify specific brain regions affected in delusional disorder.

Main Methods:

  • Utilized structural imaging (voxel-based morphometry) and functional imaging (n-back task, resting-state connectivity).
  • Examined 22 patients with DSM-IV criteria for delusional disorder and 44 healthy controls.

Main Results:

  • Observed grey matter reductions in medial frontal/anterior cingulate cortex and bilateral insula.
  • Detected impaired de-activation in the medial frontal/anterior cingulate cortex during cognitive tasks.
  • Found decreased resting-state connectivity in the bilateral insula.

Conclusions:

  • Provided evidence for brain abnormalities in the medial frontal/anterior cingulate cortex and insula in delusional disorder.
  • Suggested a potential role for the medial frontal/anterior cingulate cortex in the pathogenesis of delusions.