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Related Experiment Videos

Myelin development and nutritional insufficiency

R C Wiggins

    Brain Research
    |June 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Postnatal undernourishment slightly reduces rat brain cell numbers but severely impacts myelin development. This hypomyelination stems from impaired oligodendrocyte maturation, not just proliferation, leading to lasting deficits.

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    Area of Science:

    • Neuroscience
    • Developmental Biology
    • Nutritional Science

    Background:

    • Postnatal undernourishment can affect brain development.
    • The impact on cell generation, maturation, and myelination requires detailed investigation.

    Purpose of the Study:

    • To investigate the effects of postnatal undernourishment on rat brain cell generation and myelination.
    • To identify the critical developmental periods for myelin deficits.

    Main Methods:

    • Assessed cell numbers and brain size in undernourished rats.
    • Analyzed myelination in specific brain tracts (corpus callosum, pyramidal tract).
    • Examined myelin composition, recovery, and precursor incorporation.

    Main Results:

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    • Slight reduction in total cell numbers and brain size, with more severe effects on cell maturation.
    • Greatly reduced ratio of myelinated to non-myelinated fibers and overall brain myelin concentration.
    • Early undernourishment (oligodendroglia proliferation) caused lasting myelin deficits, while later undernourishment did not.

    Conclusions:

    • Hypomyelination in undernourished rats is primarily due to impaired oligodendrocyte maturation and myelin initiation, not just reduced cell proliferation.
    • The critical window for lasting myelin deficits is early postnatal development.
    • Findings suggest comparable effects in undernourished human infants.