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Related Experiment Videos

A quantitative electron microscopic study of atypical structures in normal human cerebral cortex.

S Rees

    Anatomy and Embryology
    |December 31, 1975
    PubMed
    Summary

    Normal human brains contain unexpected atypical neuronal structures. Neuropathologists and neuroanatomists should recognize these common neuronal process variations in healthy brains.

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    Area of Science:

    • Neuroscience
    • Neuropathology
    • Neuroanatomy

    Background:

    • Electron microscopy is crucial for detailed neuronal and neuroglial examination.
    • Atypical neuronal structures are typically associated with pathological or experimental conditions.

    Purpose of the Study:

    • To investigate the presence and prevalence of atypical neuronal and neuroglial structures in normal human cerebral cortex.
    • To inform neuropathologists and neuroanatomists about these findings in healthy brains.

    Main Methods:

    • Electron microscopic examination of biopsy samples from four normal human brains.
    • Systematic scanning and categorization of atypical structures within a defined area (3.6 x 10^5 μm²) per brain.

    Main Results:

    • Atypical forms of axons, axon terminals, and dendrites were found in small but significant numbers.
    • Neuroglia with atypical inclusions were observed but were less frequent.
    • Physiologically altered neuronal perikarya were rare, with only one instance of neuronal death noted.

    Conclusions:

    • Atypical neuronal processes exist in normal human brains, contrary to expectations.
    • Awareness of these structures is essential for accurate diagnosis and research in neuropathology and neuroanatomy.

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