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Related Experiment Videos

Partial volume decrease of the thalamus in relatives of patients with schizophrenia

W G Staal1, H E Hulshoff Pol, H Schnack

  • 1Department of Psychiatry, University Hospital Utrecht, The Netherlands.

The American Journal of Psychiatry
|December 8, 1998
PubMed
Summary

Schizophrenia patients have smaller thalamic volumes. Their healthy siblings also show reduced thalamic volume, suggesting shared genetic factors for brain abnormalities in families.

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Area of Science:

  • Neuroimaging
  • Psychiatry
  • Genetics

Background:

  • Schizophrenia is a complex psychiatric disorder with a significant genetic component.
  • Previous research indicates potential structural brain abnormalities in individuals with schizophrenia.

Purpose of the Study:

  • To compare thalamic, total brain, and intracranial volumes in schizophrenia patients, their healthy siblings, and normal controls.
  • To investigate if thalamic volume differences exist among these groups.

Main Methods:

  • Magnetic resonance imaging (MRI) was used to obtain brain scans.
  • The study included 32 same-sex sibling pairs discordant for schizophrenia and 32 matched healthy comparison subjects.

Main Results:

  • Significant differences in mean total thalamic volume (corrected for total brain volume) were observed across the groups.

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  • Thalamic volume was smallest in patients with schizophrenia.
  • Healthy siblings exhibited smaller thalamic volumes than controls but larger volumes than patients.

    • Conclusions:

    • Healthy siblings of schizophrenia patients share partial thalamic abnormalities with their affected relatives.
    • These findings suggest a potential genetic contribution to thalamic structural differences in schizophrenia families.