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The meninges in human development.

R O'Rahilly, F Müller

    Journal of Neuropathology and Experimental Neurology
    |September 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    This study details early human embryonic development of the brain and meninges. It identifies multiple embryonic tissue sources for cranial and spinal meninges, including the neural crest.

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    Area of Science:

    • Developmental biology
    • Embryology
    • Neuroscience

    Background:

    • The development of the brain and its protective meninges is crucial for understanding neurological health.
    • Previous studies have examined meningeal development but often at later embryonic stages.

    Purpose of the Study:

    • To provide a comprehensive view of meningeal development by examining earlier embryonic stages.
    • To identify the embryonic origins of cranial and spinal meninges.

    Main Methods:

    • Serial sectioning of 61 human embryos across developmental stages 8-23.
    • Comparative analysis of embryonic meningeal structures with existing literature.

    Main Results:

    • Identified multiple potential sources for cranial and spinal meninges: prechordal plate, paraxial mesoderm (segmented and unsegmented), mesectoderm (neural crest), neurilemmal cells (neural crest), and neural tube.

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  • The tentorium cerebelli is the first dural process to develop, differing in embryonic form from later stages.
  • The embryonic dural limiting layer (Duragrenzschicht) likely corresponds to the adult meninges' interface layer.

    • Conclusions:

    • Early embryonic stages offer critical insights into meningeal development.
    • The neural crest is a significant contributor to both cranial and spinal meninges.
    • Embryonic development of meningeal structures like the tentorium cerebelli undergoes substantial transformation into fetal and adult forms.