Internal laryngeal nerve
|Nerve: Internal laryngeal nerve|
Course and distribution of the glossopharyngeal, vagus, and accessory nerves. (Internal branch of superior laryngeal labeled at center right.)
|Latin||ramus internus nervi laryngei superioris|
|From||superior laryngeal nerve|
The internal laryngeal nerve is the internal branch (ramus internus) of the superior laryngeal nerve. It descends to the thyrohyoid membrane, piercing 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.
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. The vocal fold itself receives dual innervation from both nerves.
Irritation of the internal laryngeal nerve results in uncontrolled coughing - usually as a result of food or water in the laryngopharynx.
- -563412934 at GPnotebook
- cranialnerves at The Anatomy Lesson by Wesley Norman (Georgetown University) (X)
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