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Age-related brain atrophy: a study with computed tomography.

S Takeda, T Matsuzawa

    Journal of Gerontology
    |March 1, 1985
    PubMed
    Summary
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    Brain atrophy, measured by cerebrospinal fluid (CSF) space and brain atrophy index (BAI), shows distinct sex-specific patterns. Significant brain atrophy begins in the 40s for men and 50s for women.

    Area of Science:

    • Neuroscience
    • Radiology
    • Gerontology

    Background:

    • Brain atrophy is a common aging process.
    • Understanding sex differences in brain atrophy is crucial for aging research.

    Purpose of the Study:

    • To investigate age-related changes in brain atrophy in men and women.
    • To determine the onset and progression of brain atrophy in different sexes.

    Main Methods:

    • Utilized x-ray computed tomography to assess brain atrophy.
    • Measured cerebrospinal fluid (CSF) space volume and calculated brain atrophy index (BAI).
    • Analyzed data from 176 men and 205 women aged 21-79 without neurological disturbances.

    Main Results:

    • CSF space and BAI decreased in men from their 20s to 30s, minimal in the 30s.

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  • Women showed minimal CSF space and BAI in their 20s.
  • Both sexes exhibited increasing CSF space and BAI from the 40s onwards.
  • Significant brain atrophy commenced in the 40s for men and 50s for women.
  • CSF space and BAI increased exponentially with age after the 30s in both sexes.

    • Conclusions:

    • Brain atrophy progression differs significantly between sexes.
    • Men experience earlier onset of considerable brain atrophy compared to women.
    • Age-related brain volume changes follow distinct trajectories based on sex.