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Arborization of the inferior laryngeal nerve and internal nerve on the posterior surface of the larynx

✍ Scribed by Iwao Sato; Dr. Kazuyuki Shimada

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
843 KB
Volume
8
Category
Article
ISSN
0897-3806

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✦ Synopsis

The morphological patterns of the inferior laryngeal nerve and internal laryngeal nerve display complex arborizations. This paper attempts to identify and clarify these patterns.

Dissections were performed on 105 adult Japanese cadavers, and observations were made on 201 sides. Results showed that the communications between the inferior laryngeal nerve (ILN) and internal laryngeal nerve (ITLN) could be classified into two types and three subtypes. Also, the ITLN displayed three characteristic patterns at the arytenoid cartilage. These communications produce complex arborizations of the ILN as it enters the larynx. This may explain the variety of potential clinical symptoms observed after thyroid surgery or neck dissections.

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The mucosa of the larynx contains one of the most dense concentrations of sensory receptors in the human body. This sensitivity is used for reflexes that protect the lungs, and even momentary loss of this function is followed rapidly by life-threatening pneumonia. The internal superior laryngeal ner