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Related Experiment Videos

Progressive changes in schizophrenia: do they exist and what do they mean?

J E Anderson1, B F O'Donnell, R W McCarley

  • 1The Clinical Neuroscience Division, Laboratory of Neuroscience, Department of Psychiatry, Brockton VA Medical Centre and Harvard Medical School, Boston, MA 02401, USA.

Restorative Neurology and Neuroscience
|April 3, 2003
PubMed
Summary

Schizophrenia involves progressive brain changes, including structural and neurophysiological alterations. A "two-hit" model integrating neurodevelopmental and neurodegenerative factors may explain some subtypes of this complex disorder.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Brain Imaging

Background:

  • Schizophrenia presents with diverse symptoms and variable outcomes.
  • Its exact cause remains unknown, with possibilities including multiple or a single unique pathophysiological process.

Purpose of the Study:

  • To review evidence for progressive changes in schizophrenia.
  • To elucidate the pathophysiology of this disorder through longitudinal data.

Main Methods:

  • Review of clinical and psychosocial changes over time.
  • Analysis of structural brain imaging studies (cross-sectional and longitudinal).
  • Evaluation of neurophysiological findings and cellular mechanisms (e.g., NMDA receptor abnormalities).

Main Results:

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  • Schizophrenia is indicated as a brain disorder with progressive structural changes.
  • Evidence suggests both cross-sectional and longitudinal neurophysiological alterations.
  • NMDA receptor abnormalities are implicated in structural and functional brain changes.

Conclusions:

  • Schizophrenia pathophysiology may involve progressive neurodevelopmental and neurodegenerative processes.
  • A "two-hit" model is proposed for certain schizophrenia subtypes.
  • Understanding these progressive changes is crucial for elucidating schizophrenia's onset and course.