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Encyclopedia > Auriculotemporal nerve
Nerve: Auriculotemporal nerve
Sympathetic connections of the otic and superior cervical ganglia. (Auriculotemporal labeled at top right.)
Distribution of the maxillary and mandibular nerves, and the submaxillary ganglion.
Latin n. auriculotemporalis
Gray's subject #200 895
Innervates temple
From mandibular nerve

The auriculotemporal nerve is a branch of the mandibular nerve that runs with the superficial temporal artery and vein, and provides sensory innervation to various regions on the side of the head. From Grays Anatomy This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. ... Image File history File links Gray778. ... The Maxillary nerve is one of the three branches of the trigeminal nerve, one of the cranial nerves. ... The mandibular nerve is the third branch (V3) of the trigeminal nerve. ... The submandibular ganglion (or submaxillary ganglion in older texts) is of small size and is fusiform in shape. ... For other uses, see Latin (disambiguation). ... The temple is the side of the head behind the eyes Temple indicates the side of the head behind the eyes. ... The mandibular nerve is the third branch (V3) of the trigeminal nerve. ... The mandibular nerve is the third branch (V3) of the trigeminal nerve. ... Arteries of the neck - right side. ...

Contents

Structure

Origin

The auriculotemporal nerve arises as two roots from the posterior division of the mandibular nerve. These roots encircle the middle meningeal artery (a branch of the mandibular part of the maxillary artery, which is in turn a terminal branch of the external carotid artery). The roots then converge to form a single nerve. The mandibular nerve is the third branch (V3) of the trigeminal nerve. ... The middle meningeal artery is typically the first branch of the first part (retromandibular part) of the maxillary artery; one of the two terminal branches of the external carotid artery. ...


Course

The auriculotemporal nerve passes medially to the neck of the mandible, gives off parotid branches and then turns superiorly, posterior to its head and anterior to the auricle. It then crosses over the root of the zygomatic process of the temporal bone, deep to the superficial temporal artery Auricle has the following meanings: The external portion of the ear. ... Arteries of the neck - right side. ...


Innervation

The somatosensory root (superior) originates from branches of the mandibular nerve, which pass through the otic ganglion without synapsing. Then they form the somatosensory (superior) root of the auriculotemporal nerve. The two roots re-unite and shortly after the branching of secretomotor fibers to the parotid gland (parotid branches) the auriculotemporal nerve comprises exclusively somatosensory fibers, which ascend up to the superficial temporal region. Supplies the auricle, external acoustic meatus, outer side of the tympanic membrane and the skin in the temporal region. Anatomy of the human ear. ... The tympanum or tympanic membrane, colloquially known as eardrum, is a thin membrane that separates the outer ear from the middle ear. ...


The parasympathetic root (inferior) carries postganglionic fibers to the parotid gland. These parasympathetic, preganglionic secretomotor fibers originate from the glossopharyngeal nerve (CN IX) as one of its branches, the lesser petrosal nerve. This nerve synapses in the otic ganglion and its postganglionic fibers from the inferior, parasympathetic root of the auriculotemporal nerve. The two roots re-unite and shortly after the "united" auriculotemporal branch gives off parotid branches, which serve as secretomotor fibers for the parotid gland. For the toad wart, see parotoid gland. ... Secretomotor refers to the capacity of a structure (often a nerve) to induce a gland to secrete a substance (usually mucus or serous). ...


Clinical significance

This nerve as it courses posteriorly to the condylar head, is frequently injured in temporomandibular joint surgery, causing an ipsilateral parasthesia of the auricle and skin surrounding the ear. Paresthesia (paraesthesia in British English) is a sensation of tingling, pricking, or numbness of the skin with no apparent physical cause, more generally known as the feeling of pins and needles. ...


See also

Arteries of the neck - right side. ...

Additional images

External links


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