Lesser petrosal nerve

Lesser petrosal nerve

Infobox Nerve
Name = Lesser petrosal nerve
Latin = nervus petrosus minor
GraySubject =
GrayPage =


Caption = Plan of the facial and intermediate nerves and their communication with other nerves.


Caption2 = Mandibular division of trifacial nerve, seen from the middle line. The small figure is an enlarged view of the otic ganglion. (Small petrosal labeled at center top and bottom right.)
Innervates = parotid gland
BranchFrom = tympanic plexus
BranchTo = otic ganglion
MeshName =
MeshNumber =
DorlandsPre = n_05
DorlandsSuf = 12566476

The lesser petrosal nerve consists of parasympathetic fibers. It leaves the tympanic plexus to synapse in the otic ganglion, and eventually provide parasympathetic innervation to the parotid gland.

The tympanic plexus has parasympathetic (preganglionic) roots which contribute to the lesser petrosal nerve. Parasympathetic contribution is from the tympanic nerve which branches from the glossopharyngeal nerve (CN IX) in the jugular foramen.

The lesser petrosal nerve exits the temporal bone and enters the middle cranial fossa through the hiatus of lesser petrosal nerve. It then exits the middle cranial fossa through foramen ovale to the otic ganglion where its parasympathetic fibers synapse. From the otic ganglion, its fibers hitchhike with the auriculotemporal nerve (from V3) to eventually innervate the parotid gland.

The geniculate ganglion also communicates with the lesser petrosal nerve.

External links

*
* (NormanAnatomyFig|IX)
* (NormanAnatomyFig|midearcavity) (#7)
*
*


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • lesser petrosal nerve — n the continuation of the tympanic nerve beyond the inferior ganglion of the glossopharyngeal nerve that passes into the cranial cavity through the petrosal bone and out again to terminate in the otic ganglion which it supplies with preganglionic …   Medical dictionary

  • Hiatus for lesser petrosal nerve — Infobox Anatomy Name = PAGENAME Latin = hiatus canalis nervi petrosi minoris GraySubject = GrayPage = Caption = Mandibular division of trifacial nerve, seen from the middle line. The small figure is an enlarged view of the otic ganglion. Caption2 …   Wikipedia

  • Petrosal nerve — (a nerve traveling through the petrous portion of the temporal bone) may refer to:*Deep petrosal nerve *Greater petrosal nerve (also known as the greater superficial petrosal nerve) *Lesser petrosal nerve (also known as the lesser superficial… …   Wikipedia

  • petrosal nerve — n any of several small nerves passing through foramina in the petrous portion of the temporal bone: as a) DEEP PETROSAL NERVE b) GREATER PETROSAL NERVE c) LESSER PETROSAL NERVE …   Medical dictionary

  • petrosal nerve lesser — petrosal nerve, lesser superficial nervus petrosus minor …   Medical dictionary

  • groove for lesser petrosal nerve — sulcus nervi petrosi minoris …   Medical dictionary

  • hiatus for lesser petrosal nerve — h. canalis nervi petrosi minoris …   Medical dictionary

  • Nerve of pterygoid canal — Nerve: Nerve of pterygoid canal Plan of the facial and intermediate nerves and their communication with other nerves. (Vidian nerve labeled at upper right.) Latin n. canalis pterygoidei Gray s …   Wikipedia

  • Nerve to the stapedius — Nerve: Nerve to the stapedius Latin nervus stapedius Gray s subject #202 904 Innervates Stapedius From facial nerve The Nerve to the Stapedi …   Wikipedia

  • Nerve — A bundle of fibers that uses electrical and chemical signals to transmit sensory and motor information from one body part to another. See nervous system. * * * A whitish cordlike structure composed of one or more bundles (fascicles) of myelinated …   Medical dictionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”