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Related Concept Videos

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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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Neural substrates underlying delusions in schizophrenia.

Jiajia Zhu1, Chuanjun Zhuo1,2, Feng Liu1

  • 1Department of Radiology and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin 300052, China.

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|September 22, 2016
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Summary
This summary is machine-generated.

Schizophrenia patients with severe delusions show normal brain structure but reduced blood flow in the anterior cingulate cortex. This decreased perfusion may be linked to the development of delusions in schizophrenia.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Radiology

Background:

  • Delusions are a core symptom of schizophrenia, but their underlying neural mechanisms are not fully understood.
  • Investigating the neural correlates of delusions is crucial for understanding schizophrenia pathophysiology.

Purpose of the Study:

  • To explore the neural substrates of delusions in schizophrenia using multi-modal magnetic resonance imaging (MRI).
  • To compare brain structure and function in schizophrenia patients with and without severe delusions against healthy controls.

Main Methods:

  • Employed diffusion, structural, and perfusion MRI scans on three groups: 19 schizophrenia patients with severe delusions, 30 schizophrenia patients without delusions, and 30 healthy controls.
  • Voxel-wise analysis of fractional anisotropy (FA), gray matter volume (GMV), and cerebral blood flow (CBF) was conducted.

Main Results:

  • Schizophrenia patients without delusions showed reduced FA and GMV compared to controls.
  • Patients with severe delusions had comparable white matter FA and gray matter GMV to controls, but reduced GMV in the amygdala and anterior cingulate cortex.
  • Both patient groups exhibited altered CBF, with significantly lower CBF in the anterior cingulate cortex observed in patients with severe delusions compared to those without.

Conclusions:

  • Schizophrenia patients with severe delusions exhibit relatively preserved structural integrity of white and gray matter.
  • Reduced cerebral blood flow in the anterior cingulate cortex is a potential key factor in the development of delusions in schizophrenia.