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Encyclopedia > External laryngeal nerve
Nerve: External laryngeal nerve
Course and distribution of the glossopharyngeal, vagus, and accessory nerves. (External branch of superior laryngeal labeled at center right.)
Latin ramus externus nervi laryngei superioris
Gray's subject #205 912
From superior laryngeal nerve
Dorlands/Elsevier r_02/12690066

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. Image File history File links Download high resolution version (432x1000, 114 KB) Summary Licensing File links The following pages link to this file: Vagus nerve Glossopharyngeal nerve Accessory nerve Wikipedia:Grays Anatomy images with missing articles 16 Recurrent laryngeal nerve List of images in Grays Anatomy: IX. Neurology... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... The Superior Laryngeal Nerve arises from the middle of the ganglion nodosum and in its course receives a branch from the superior cervical ganglion of the sympathetic. ... Elseviers logo. ... The Superior Laryngeal Nerve arises from the middle of the ganglion nodosum and in its course receives a branch from the superior cervical ganglion of the sympathetic. ... The pharynx (plural pharynx), or voicebox, is an organ in the neck of mammals involved in protection of the trachea and sound production. ... The Sternothyroid muscle is a muscle of the human body. ... The cricothyroid muscle attaches to the anterolateral aspect of the cricoid and the inferior cornu and lower lamina of the thyroid cartilage, tilting the thyroid forwards and lengthening the vocal cords. ...

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. The pharyngeal plexus is a network of nerve fibers supplied by the pharyngeal branch of vagus nerve joining with branches from the glossopharyngeal nerve, sympathetic fibers, and the external laryngeal nerve. ... The superior cardiac nerve arises by two or more branches from the superior cervical ganglion, and occasionally receives a filament from the trunk between the first and second cervical ganglia. ... Left Common Carotid Artery- One of three arteries that originate along the aortic arch. ...

Clinical significance

The external branch is susceptible to damage during thyroidectomy, as it lies immediately deep to the superior thyroid artery. A thyroidectomy involves the surgical removal all or part of the thyroid gland. ... The superior thyroid artery arises from the external carotid artery just below the level of the greater cornu of the hyoid bone and ends in the thyroid gland. ...

External links

  • GPnotebook 1328873530
  • Maranillo E, León X, Quer M, Orús C, Sañudo J (2003). "Is the external laryngeal nerve an exclusively motor nerve? The cricothyroid connection branch.". Laryngoscope 113 (3): 525-9. PMID 12616208.
  • Overview at sprojects.mmi.mcgill.ca

  Results from FactBites:
XI. Splanchnology. 1a. The Larynx. Gray, Henry. 1918. Anatomy of the Human Body. (4530 words)
—The chief arteries of the larynx are the laryngeal branches derived from the superior and inferior thyroid.
The former accompany the superior laryngeal artery and pierce the hyothyroid membrane, to end in the glands situated near the bifurcation of the common carotid artery.
The nerves are derived from the internal and external branches of the superior laryngeal nerve, from the recurrent nerve, and from the sympathetic.
ear disease --  Encyclopædia Britannica (738 words)
Serious impairment of hearing at birth almost always results from a dysfunction of the auditory nerve and cannot be improved by medical or surgical treatment.
The labyrinth of the inner ear contains the nerve endings of the vestibular nerve—the nerve of equilibrium—and the auditory nerve, which are branches of the vestibulocochlear, or eighth cranial, nerve.
Nerve deafness results from a loss of function of the sensory apparatus of the inner ear or its connecting nerve...
  More results at FactBites »



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