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Considerations on the phrenic ganglia.

Mugurel Constantin Rusu1

  • 1Department of Anatomy and Embryology, University of Medicine and Pharmacy Carol Davila, Bucharest, Romania. anatomon@gmail.com

Annals of Anatomy = Anatomischer Anzeiger : Official Organ of the Anatomische Gesellschaft
|February 2, 2006
PubMed
Summary

Phrenic ganglia are consistently found on the right side, varying in number and potentially serving adrenal and diaphragmatic vasomotor functions within the celiac plexus.

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Area of Science:

  • Anatomy
  • Neuroscience
  • Human Physiology

Background:

  • The phrenic ganglion's existence and characteristics are poorly documented.
  • Existing descriptions are limited and incomplete, necessitating further investigation.

Purpose of the Study:

  • To investigate the macroscopic and microscopic anatomy of the phrenic ganglion.
  • To clarify the structure and potential function of these ganglia.

Main Methods:

  • Macroscopic dissection of 10 adult human specimens.
  • Microscopic examination using silver staining (Bielschowsky method).

Main Results:

  • Identified one or more phrenic ganglia on the right side, linking the phrenic nerve and celiac ganglion.
  • Observed autonomic characteristics and intrinsic microganglia within the ganglia and diaphragmatic nerve.
  • Detected periadventitial nervous cells on the right inferior phrenic artery; no left phrenic ganglia were found.

Conclusions:

  • Phrenic ganglia appear to be constant right-sided structures with variable numbers.
  • These ganglia likely function as adrenal and diaphragmatic vasomotor components of the celiac plexus.
  • Autonomic nervous cells may also exist in intrinsic neural and periarterial locations, undetectable macroscopically.

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