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Related Experiment Videos

Comparative ultrastructure of ureteric innervation.

A D Hoyes, P Barber, B G Martin

    Cell and Tissue Research
    |July 23, 1975
    PubMed
    Summary

    Ureteric nerve distribution varies significantly across mammals, impacting deep submucous plexus development and vascularization. These findings highlight interspecies differences in autonomic innervation of the ureter.

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    Area of Science:

    • Comparative anatomy
    • Neuroscience
    • Urology

    Background:

    • The autonomic innervation of the ureter plays a crucial role in its function.
    • Previous studies have detailed the ureteric nervous system in rats, but comparative data across mammalian species is limited.

    Purpose of the Study:

    • To compare the distribution and structure of ureteric nerves in a small series of mammals with existing data from rats.
    • To investigate interspecies variations in ureteric nerve penetration, plexus development, and innervation patterns.

    Main Methods:

    • Comparative histological analysis of ureteric tissues from various mammalian species.
    • Detailed examination of nerve distribution, plexus development (submucous and periarteriolar), and vascular associations.
    • Ultrastructural analysis of nerve terminals and vesicle content.

    Main Results:

    • Significant interspecies variation observed in ureteric nerve penetration and deep submucous plexus development.
    • In species with developed submucous plexuses, terminal arterioles penetrated the muscle coat, accompanied by adventitial nerves and periarteriolar plexuses.
    • Adrenergic axons were abundant in periarteriolar plexuses; cholinergic axons were less common but present in well-developed submucous plexuses. Nerve terminals showed variable vesicle content.

    Conclusions:

    • Ureteric nerve structure and distribution exhibit marked interspecies variability.
    • The development of the deep submucous plexus correlates with vascular penetration and specific nerve associations.
    • Variations in axon diameter and vesicle numbers in nerve terminals may relate to processing artifacts.

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