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Ventricular surface of rabbit hippocampus: a scanning electron microscope study

M Hasan, A C Shipstone, V K Bajpai

    Brain Research Bulletin
    |May 1, 1978
    PubMed
    Summary

    Rabbit hippocampus ependyma exhibits dense cilia coverage, with some showing bulbous enlargements. The pes hippocampi region displayed fewer cilia and deeper surface furrows compared to other areas.

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    Area of Science:

    • Neuroscience
    • Cell Biology
    • Microscopy

    Background:

    • The ependyma lines the brain ventricles and central canal.
    • Ependymal cells possess cilia crucial for cerebrospinal fluid (CSF) flow.
    • The hippocampus is vital for learning and memory, and its ependymal lining may play a role.

    Purpose of the Study:

    • To investigate the ultrastructural morphology of ependymal cells in the adult rabbit hippocampus.
    • To identify surface specializations of hippocampal ependyma using scanning electron microscopy.

    Main Methods:

    • Ependymal tissue was harvested from adult rabbit hippocampi.
    • Samples were prepared and examined using scanning electron microscopy (SEM).

    Main Results:

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    • The majority of the ependymal surface was covered by dense cilia.
    • Some cilia exhibited bulbous preterminal enlargements.
    • Irregular pits of varying sizes were observed on the ependymal surface.
    • The pes hippocampi region showed a reduced density of cilia and more pronounced surface furrows compared to other hippocampal areas.

    Conclusions:

    • The hippocampal ependyma possesses a ciliated surface with unique morphological features.
    • Regional variations in ependymal cell morphology exist within the hippocampus, particularly in the pes hippocampi.
    • These findings contribute to understanding the structural diversity of ependymal surfaces in the brain.