Table of Contents
Advances in Anatomy
Volume 2014, Article ID 858539, 5 pages
http://dx.doi.org/10.1155/2014/858539
Research Article

Terminal Branch of Recurrent Human Laryngeal Nerve

1EPM-UNIFESP, 04023-062 São Paulo, SP, Brazil
2Centro Universitário São Camilo, Avenida Nazaré, No. 1501, 04263-200 São Paulo, SP, Brazil

Received 7 April 2014; Revised 24 August 2014; Accepted 29 August 2014; Published 16 September 2014

Academic Editor: Fabian Mohamed

Copyright © 2014 Andréa Aparecida Ferreira Pascoal et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The importance of the recurrent laryngeal nerve in surgery on the anterior region of the neck has motivated many published papers on critical points of its pathway, relationship with the inferior thyroid artery, penetration in the larynx, division outside the larynx, and branches communicating with the internal branch of the superior laryngeal nerve. We analyze the terminal branches of the recurrent laryngeal nerve and their distribution through the laryngeal muscles. 44 laryngeal nerves had been dissected. Most frequently, the recurrent laryngeal nerve presents a division below or at the level of the lower margin of the cricoid cartilage (outside the larynx). One of these branches forms the communication with the internal branch of the superior laryngeal nerve, and the other penetrates the laryngeal space. Above the lower margin of the cricoid cartilage, the inferior laryngeal nerve issues a variable number of branches to muscles (3 to 7): to the posterior cricoarytenoid muscle; to the oblique and transversal arytenoid muscles; and to the lateral cricoarytenoid muscle and the thyroarytenoid muscle.