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[Cerebral changes in manic-depressive patients]

L V Kessing1, T G Bolwig

  • 1Psykiatrisk afdeling O, Rigshospitalet, København.

Ugeskrift for Laeger
|May 23, 1994
PubMed
Summary
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Brain imaging reveals shared structural and functional changes in schizophrenia and affective disorders. Enlarged ventricles and broader sulci appear in both, while white matter changes are more common in bipolar disorder.

Area of Science:

  • Neuroscience
  • Psychiatry
  • Radiology

Background:

  • Neuroimaging research in psychiatry has historically focused on schizophrenia.
  • Recent studies indicate overlapping cerebral changes in affective disorders.

Purpose of the Study:

  • To compare neuroimaging findings between schizophrenia and affective disorder patients.
  • To identify common and distinct cerebral alterations in these psychiatric conditions.

Main Methods:

  • Utilized advanced neuroimaging techniques: computed tomography (CT), magnetic resonance imaging (MRI), single photon emission computed tomography (SPECT), and positron emission tomography (PET).
  • Compared brain structure and function in patients with schizophrenia and affective disorders against healthy volunteers.

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Main Results:

  • Both schizophrenia and affective disorder patients exhibited structural changes like enlarged lateral and third ventricles and broader cerebral sulci compared to controls.
  • Subcortical hyperintensities in deep white matter and periventricular regions were more prevalent in bipolar disorder patients than in schizophrenic patients.
  • Functional neuroimaging showed reduced prefrontal cortex activity during depressive states and left hemisphere hypoactivity, common in affective disorders.

Conclusions:

  • Schizophrenia and affective disorders share common neurobiological underpinnings, evidenced by similar structural brain changes.
  • Distinct patterns of white matter abnormalities may differentiate these conditions.
  • The etiology and pathophysiological significance of these observed brain changes remain to be elucidated.