Internal laryngeal nerve
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| Nerve: Internal laryngeal nerve | |
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| Course and distribution of the glossopharyngeal, vagus, and accessory nerves. (Interal branch of superior laryngeal labeled at center right.) | |
| Latin | ramus internus nervi laryngei superioris |
| Gray's | subject #205 912 |
| From | superior laryngeal nerve |
| Dorlands / Elsevier | r_02/12690381 |
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The internal laryngeal nerve is the internal branch (ramus internus) of the superior laryngeal nerve. It descends to the hyothyroid membrane, pierces it in company with the superior laryngeal artery, and is distributed to the mucous membrane of the larynx.
Of these (sensory) branches some are distributed to the epiglottis, the base of the tongue, and the epiglottic glands; others pass backward, in the aryepiglottic fold, to supply the mucous membrane surrounding the entrance of the larynx, and that lining the cavity of the larynx as low down as the vocal folds.
A filament descends beneath the mucous membrane on the inner surface of the thyroid cartilage and joins the recurrent nerve.
Above the vocal folds the sensory innervation of the larynx is via the internal laryngeal nerve. Below the vocal folds it is by way of branches of the recurrent laryngeal nerve.
Pathology
Irritation of the internal laryngeal nerve results in uncontrolled coughing - usually as a result of food or water in the laryngopharynx.
Additional images
 The ligaments of the larynx. Antero-lateral view. |
External links
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Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
