External laryngeal nerve

External laryngeal nerve

Infobox Nerve
Name = PAGENAME
Latin = ramus externus nervi laryngei superioris
GraySubject = 205
GrayPage = 912


Caption = Course and distribution of the glossopharyngeal, vagus, and accessory nerves. (External branch of superior laryngeal labeled at center right.)


Caption2 =
Innervates =
BranchFrom = superior laryngeal nerve
BranchTo =
MeshName =
MeshNumber =
DorlandsPre = r_02
DorlandsSuf = 12690066
The external laryngeal nerve is the smaller, external branch (ramus externus) of the superior laryngeal nerve. It descends on the larynx, beneath the sternothyroid muscle, to supply the cricothyroid muscle.

It gives branches to the pharyngeal plexus and the superior portion of the inferior pharyngeal constrictor, and communicates with the superior cardiac nerve behind the common carotid artery.

Clinical significance

The external branch is susceptible to damage during thyroidectomy, as it lies immediately deep to the superior thyroid artery.

External links

*
*
* [http://sprojects.mmi.mcgill.ca/larynx/notes/anat/nanerve1.htm Overview at sprojects.mmi.mcgill.ca]
* (NormanAnatomyFig|X)


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