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Hippocampal morphometry in schizophrenia by high dimensional brain mapping

J G Csernansky1, S Joshi, L Wang

  • 1Department of Psychiatry, Washington University, St. Louis, MO 63130, USA. csernanj@medicine.wustl.edu

Proceedings of the National Academy of Sciences of the United States of America
|September 16, 1998
PubMed
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Schizophrenia patients show distinct hippocampal shape differences, not just volume changes. Advanced shape analysis reveals abnormalities linked to prefrontal cortex connections, supporting new disease theories.

Area of Science:

  • Neuroscience
  • Psychiatry
  • Medical Imaging

Background:

  • Theories suggest the hippocampus plays a role in schizophrenia pathophysiology.
  • Previous in vivo magnetic resonance imaging (MRI) studies on hippocampal volume in schizophrenia have produced inconsistent results.
  • Normal variability and manual measurement errors may contribute to inconclusive findings.

Purpose of the Study:

  • To resolve controversy regarding hippocampal abnormalities in schizophrenia.
  • To compare hippocampal volumes and shape characteristics between schizophrenia patients and controls using advanced methods.
  • To investigate if shape analysis is more sensitive than volume analysis in detecting schizophrenia-related neuroanatomical differences.

Main Methods:

  • Utilized high-dimensional transformations of a computerized brain template for comparative analysis.

Related Experiment Videos

  • Applied principles of general pattern matching, constrained by fluid dynamics.
  • Analyzed 15 matched pairs of schizophrenia and control subjects.

    • Main Results:

    • Shape comparison revealed statistically significant differences between schizophrenia and control groups, outperforming volume comparisons.
    • Hippocampal shape deformations in schizophrenia subjects were localized to subregions projecting to the prefrontal cortex.
    • These findings indicate specific anatomical alterations within the hippocampus.

    Conclusions:

    • Abnormalities in hippocampal anatomy are present in schizophrenia.
    • Results support hypotheses linking schizophrenia to disturbed hippocampal-prefrontal connections.
    • Neuroanatomical shape comparisons offer greater insight than volume comparisons for identifying neuropsychiatric conditions like schizophrenia.