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Schizophrenia with auditory hallucinations: a voxel-based morphometry study.

Gracián García-Martí1, Eduardo J Aguilar, Juan J Lull

  • 1Bioengineering, Electronic and Telemedicine Group, Polytechnic University of Valencia, Camino de Vera, s/n, ES-46022 Valencia, Spain. gragarma@fis.upv.es

Progress in Neuro-Psychopharmacology & Biological Psychiatry
|August 25, 2007
PubMed
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Schizophrenia patients show gray matter reductions in brain areas linked to auditory hallucinations. Specific structural changes correlate with hallucination severity, potentially aiding biomarker development.

Area of Science:

  • Neuroimaging
  • Psychiatry
  • Neuroscience

Background:

  • Schizophrenia is associated with subtle gray matter abnormalities.
  • Previous research linked specific brain regions to auditory hallucinations, but not their severity.
  • A direct link between morphometric data and auditory hallucination scales remained unexplored.

Purpose of the Study:

  • To investigate structural brain abnormalities in schizophrenia patients with persistent auditory hallucinations.
  • To correlate these abnormalities with the intensity and phenomenology of auditory hallucinations.
  • To identify potential magnetic resonance voxel-based morphometry (MR-VBM) biomarkers.

Main Methods:

  • Applied magnetic resonance voxel-based morphometry (MR-VBM) to 18 schizophrenia patients and 19 healthy controls.

Related Experiment Videos

  • Patients had persistent auditory hallucinations and met DSM-IV criteria for schizophrenia.
  • Auditory hallucinations were assessed using the PSYRATS scale.

    • Main Results:

    • Reduced gray matter concentration observed in bilateral insula, bilateral superior temporal gyri, and left amygdala in patients versus controls.
    • Significant correlations found between reduced gray matter in the left inferior frontal and right postcentral gyri and hallucination severity.
    • These findings suggest specific brain regions are implicated in the genesis and persistence of auditory hallucinations.

    Conclusions:

    • Structural abnormalities in specific brain regions are associated with auditory hallucinations in schizophrenia.
    • Morphometric data, particularly from the left inferior frontal and right postcentral gyri, correlate with hallucination severity.
    • MR-VBM may offer reliable biomarkers for understanding and potentially treating auditory hallucinations in schizophrenia.