Tympanic plexus

Tympanic plexus

Infobox Nerve
Name = PAGENAME
Latin = plexus tympanicus
GraySubject = 204
GrayPage = 909



Caption = View of the inner wall of the tympanum. (Grooves for tympanic plexus labeled at center.)



Caption2 = Plan of the facial and intermediate nerves and their communication with other nerves. (Tympanic plexus labeled at center.)
Innervates =
BranchFrom = caroticotympanic nerves, tympanic nerve
BranchTo =
MeshName =
MeshNumber =
DorlandsPre = p_24
DorlandsSuf = 12648546
In the tympanic cavity, the tympanic nerve (a branch of CN IX) divides into branches which form the tympanic plexus. This plexus is located on the surface of the promontory.

This tympanic plexus gives off:
* (1) the lesser superficial petrosal nerve
* (2) a branch to join the greater superficial petrosal nerve
* (3) branches to the tympanic cavity

The branches of the tympanic cavity provide innervation to the mucosa of the middle ear. The lesser petrosal nerve provides autonomic parasympathetic fibers that eventually innervate the parotid gland.

External links

*
* (NormanAnatomyFig|IX)
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Look at other dictionaries:

  • tympanic plexus — n a nerve plexus of the middle ear that is formed by the tympanic nerve and two or three filaments from the carotid plexus, sends fibers to the mucous membranes of the middle ear, the eustachian tube, and the mastoid cells, and gives off the… …   Medical dictionary

  • tympanic nerve — n a branch of the glossopharyngeal nerve arising from the petrosal ganglion and entering the middle ear where it takes part in forming the tympanic plexus called also Jacobson s nerve * * * nervus tympanicus …   Medical dictionary

  • Tympanic nerve — Nerve: Tympanic nerve Plan of upper portions of glossopharyngeal, vagus, and accessory nerves. (Tympanic nerve visible in upper right.) Latin nervus tympanicus Gray s …   Wikipedia

  • plexus tympanicus — [TA] tympanic plexus: a nerve plexus on the promontory of the middle ear, formed by the tympanic and caroticotympanic nerves. It gives off the lesser petrosal nerve and a branch of the greater petrosal nerve and sends sensory fibers to the mucous …   Medical dictionary

  • plexus caroticus internus — [TA] internal carotid plexus: a nerve plexus on the internal carotid artery, formed by the internal carotid nerve, which supplies sympathetic fibers to the branches of the internal carotid artery, to the tympanic plexus, to the nerves in the… …   Medical dictionary

  • plexus — A network or interjoining of nerves and blood vessel s or of lymphatic vessels. [L. a braid] abdominal aortic (nervous) p. [TA] an autonomic p. surrounding the abdominal aorta, directly continuous with the thoracic aortic p. superiorly and …   Medical dictionary

  • tympanic nerve — noun 1. : a branch of the glossopharyngeal nerve arising from the petrosal ganglion and distributed to the walls of the tympanum of the ear where it takes part in forming a plexus called also Jacobson s nerve 2. : a branch of the facial nerve to… …   Useful english dictionary

  • ramus tubarius plexus tympanici — [TA] tubal branch of tympanic plexus: a branch given to the auditory tube from the tympanic plexus; modality, general sensory …   Medical dictionary

  • Promontory of the tympanic cavity — Infobox Anatomy Name = PAGENAME Latin = promontorium tympani GraySubject = 230 GrayPage = 1042 Caption = View of the inner wall of the tympanum. (Promontory visible near center.) Caption2 = Precursor = System = Artery = Vein = Nerve = Lymph =… …   Wikipedia

  • Membranous wall of tympanic cavity — Coronal section of right temporal bone. The m …   Wikipedia

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