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Superior laryngeal nerve

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Plan of upper portions of glossopharyngeal, vagus, and accessory nerves. ("Laryngeal" labeled at lower right.) |- style="text-align: center;" class="hiddenStructure" | colspan="2" |

|- style="text-align: center; line-height: 1;" class="hiddenStructure" | colspan="2" |Course and distribution of the glossopharyngeal, vagus, and accessory nerves. (Branches visible in upper right.) |- class="hiddenStructure" |Latin |colspan="2"|n. laryngeus superior |- class="hiddenStructure" | |colspan="2"|[subject #205 ] |- class="hiddenStructure" |Innervates |colspan="2"| |- class="hiddenStructure" |From |colspan="2"| |- class="hiddenStructure" |To |colspan="2"| |- class="hiddenStructure" |MeSH |colspan="2"|[] |- class="hiddenStructure" |Dorlands/Elsevier |colspan="2"|[/] |} 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. It descends, by the side of the pharynx, behind the internal carotid artery, and divides into two branches, external and internal.

External branch

The external branch (ramus externus), the smaller, descends on the larynx, beneath the Sternothyreoideus, to supply the Cricothyreoideus.

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

Internal branch

The internal branch (ramus internus) 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 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.

See also

External links

Nerve: Superior laryngeal nerve
Major nerves (also see Peripheral nervous system)
Cranial nerves: I olfactory | II optic | III oculomotor | IV trochlear | V trigeminal | V1 ophthalmic (lacrimal, frontal, supratrochlear, supraorbital, nasociliary, ciliary ganglion) | V2 maxillary (sphenopalatine ganglion) | V3 mandibular (buccal - auriculotemporal - lingual - inferior alveolar - otic ganglion) | VI abducens | VII facial (chorda tympani, nervus intermedius) | VIII vestibulocochlear (cochlear, vestibular) | IX glossopharyngeal | X vagus (recurrent laryngeal, Alderman's nerve) | XI accessory | XII hypoglossal

Posterior spinal nerves: greater occipital

C1-C4 - Cervical plexus: lesser occipital | greater auricular | lesser auricular | phrenic | ansa cervicalis

C5-C8, T1 - Brachial plexus: supraclavicular branches (dorsal scapular, suprascapular, long thoracic) | lateral cord (musculocutaneous, lateral antibrachial cutaneous, lateral head of median nerve) | medial cord (ulnar, medial head of median nerve, medial antibrachial cutaneous, medial brachial cutaneous) | posterior cord (axillary, radial)

T2-T11: intercostal

T12, L1-L5 - Lumbar plexus: iliohypogastric | ilioinguinal | genitofemoral | lateral femoral cutaneous | femoral | obturator

S1-S4 - Sacral plexus: gluteal | posterior femoral cutaneous | tibial | sciatic | sural | common peroneal

S2-S5 - Pudendal plexus: perforating cutaneous | pudendal | visceral | muscular | anococcygeal

 


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