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Related Experiment Videos

Vagocervical complex replacing an absent ansa cervicalis

G Rath1, C Anand

  • 1Department of Anatomy, Lady Hardinge Medical College, New Delhi, India.

Surgical and Radiologic Anatomy : SRA
|January 1, 1994
PubMed
Summary
This summary is machine-generated.

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The ansa cervicalis, a neck muscle nerve, was absent in one of 200 cadavers. It was replaced by a vagocervical complex, which supplied the infrahyoid muscles.

Area of Science:

  • Anatomy
  • Neuroanatomy
  • Surgical Anatomy

Background:

  • The ansa cervicalis is a key nerve structure in the neck, innervating the infrahyoid muscles.
  • Variations in the ansa cervicalis can impact surgical procedures and understanding of neck anatomy.

Purpose of the Study:

  • To investigate the prevalence of ansa cervicalis absence.
  • To characterize the anatomical structures that may replace the ansa cervicalis.

Main Methods:

  • Dissection of 200 adult human cadavers.
  • Detailed anatomical description and documentation of nerve variations.

Main Results:

  • Absence of the ansa cervicalis was observed in one (0.5%) of 200 cadavers.
  • The absence was unilateral, occurring on the right side.

Related Experiment Videos

  • A vagocervical complex, formed by the vagus nerve and cervical plexus (C1-C2 components), replaced the ansa cervicalis.
  • This complex provided innervation to the infrahyoid muscles via a descending branch.

    • Conclusions:

    • Anatomical variations of the ansa cervicalis are rare but significant.
    • The vagocervical complex represents a potential compensatory pathway for infrahyoid muscle innervation.
    • Awareness of this variation is crucial for surgeons operating in the neck region.