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Cranial Nerves: Types Part II01:22

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Related Experiment Video

Updated: May 2, 2026

A Heterotopic Mouse Model for Studying Laryngeal Transplantation
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Laryngeal nerve "anastomoses".

L Naidu, L Lazarus, P Partab

  • 1Department of Clinical Anatomy University of KwaZulu Natal Private Bag X54001 Durban 4000 South Africa. satyapalk@ukzn.ac.za.

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|March 5, 2014
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Summary
This summary is machine-generated.

Neural communications within the larynx, including Galen's anastomosis and the communicating nerve, show varying incidences. These laryngeal nerve variations may influence vocal fold position in paralysis.

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Area of Science:

  • Anatomy
  • Neurology
  • Laryngology

Background:

  • Laryngeal nerves exhibit diverse communication patterns.
  • These neural connections may offer supplementary innervation to intrinsic laryngeal muscles.
  • Variations in these communications could explain differing vocal fold positions post-paralysis.

Purpose of the Study:

  • To investigate the incidence of various neural communications in the larynx.
  • To ascertain the contribution of these communications to laryngeal innervation.

Main Methods:

  • Examination of 50 adult cadaveric en-bloc laryngeal specimens.
  • Identification and classification of neural communications between laryngeal nerves.

Main Results:

  • Galen's anastomosis observed in 81% of specimens, supplying the posterior cricoarytenoid muscle in 13%.
  • Thyroarytenoid communication (9%) supplied the thyroarytenoid muscle in 2%.
  • Arytenoid plexus (28%) supplied the transverse arytenoid muscle in 6%.
  • Communicating nerve (external-recurrent laryngeal nerve communication) found in 25%.

Conclusions:

  • Neural communications within the larynx occur with varying incidences.
  • These communications contribute innervation to intrinsic laryngeal muscles.
  • Laryngeal nerve variations may be a factor in the variable positioning of vocal folds during paralysis.