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The cervical sympathetic trunk--a new hypothesis

R Kanagasuntheram1, P Dharshini

  • 1National University of Singapore.

Annals of the Academy of Medicine, Singapore
|November 1, 1994
PubMed
Summary
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Sympathetic ganglia primarily associate with intersegmental arteries, not spinal nerves. Developmental changes in cervical arteries explain the reduced number of cervical sympathetic ganglia.

Area of Science:

  • Anatomy
  • Developmental Biology
  • Neuroscience

Background:

  • Sympathetic ganglia exhibit segmental distribution in thoracic and lumbar regions, but fewer in the cervical region.
  • This regional difference suggests sympathetic ganglia may not be directly related to spinal nerves.

Purpose of the Study:

  • To propose a hypothesis for the distribution of sympathetic ganglia.
  • To explain the structural differences in sympathetic ganglia between the cervical and thoracolumbar regions.

Main Methods:

  • Comparative anatomical analysis of sympathetic ganglia and associated vasculature.
  • Developmental pathway analysis of arterial and nervous system structures.

Main Results:

  • Sympathetic ganglia are hypothesized to associate with intersegmental vessels (e.g., intercostal, lumbar arteries).

Related Experiment Videos

  • Cervical sympathetic ganglia formation involves fusion (e.g., superior cervical ganglion) influenced by the external carotid artery.
  • Vascular remodeling during development, including heart and great vessel migration, forms structures like the ansa subclavia and positions the stellate ganglion.

    • Conclusions:

    • The distribution of sympathetic ganglia is primarily linked to intersegmental arteries.
    • Developmental processes, including arterial regression and vascular migration, explain the observed patterns of sympathetic ganglia formation and location.