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[Thoracic vertebral nerve].

S D Denisov

    Arkhiv Anatomii, Gistologii I Embriologii
    |November 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    Researchers discovered a thoracic vertebral nerve in mammals, including humans, cats, and dogs. This nerve, alongside the cervical vertebral nerve, plays a role in the sympathetic trunk

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    Area of Science:

    • Comparative anatomy
    • Evolutionary biology
    • Neuroscience

    Background:

    • Phylogenetic studies suggest a potential caudal continuation of the vertebral nerve in the thoracic region of Mammalia.
    • Understanding the sympathetic trunk's evolution requires investigating all its components.

    Purpose of the Study:

    • To investigate the existence and anatomical characteristics of the thoracic vertebral nerve in mammals.
    • To determine the homology of the vertebral neural trunk in mammals with avian structures.

    Main Methods:

    • Embryological analysis
    • Anatomical dissection
    • Comparative studies in humans, cats, and dogs

    Main Results:

    • The thoracic vertebral nerve was identified in humans, cats, and dogs, alongside the cervical vertebral nerve.

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  • This nerve forms a plexus on the rudimentary thoracic vertebral artery, originating from multisegmentary gray rami communicantes.
  • The thoracic vertebral nerve, combined with the cervical nerve, forms the vertebral neural trunk, homologous to the secondary sympathetic trunk in birds.

    • Conclusions:

    • The thoracic vertebral nerve is an anatomical reality in mammals, contributing to the innervation of somatic and autonomic structures.
    • This nerve likely represents a significant pathway in the sympathetic nervous system, potentially influenced by cervical vertebral nerve dysfunction.