Mandibular nerve

Mandibular nerve
Mandibular nerve
	Mandibular division of the trigeminal nerve.
	Mandibular division of trigeminal nerve, seen from the middle line. The small figure is an enlarged view of the otic ganglion.
Details
From	Trigeminal nerve (CN V)
Identifiers
Latin	nervus mandibularis
MeSH	D008340
TA98	A14.2.01.064
TA2	6246
FMA	52996
	Anatomical terms of neuroanatomy [edit on Wikidata]

In neuroanatomy, the mandibular nerve (V₃) is the largest of the three divisions of the trigeminal nerve, the fifth cranial nerve (CN V). Unlike the other divisions of the trigeminal nerve (ophthalmic nerve, maxillary nerve) which contain only afferent fibers, the mandibular nerve contains both afferent and efferent fibers. These nerve fibers innervate structures of the lower jaw and face, such as the tongue, lower lip, and chin. The mandibular nerve also innervates the muscles of mastication.^[1]

Structure

Course

The large sensory root of mandibular nerve emerges from the lateral part of the trigeminal ganglion and exits the cranial cavity through the foramen ovale. The motor root (Latin: radix motoria s. portio minor), the small motor root of the trigeminal nerve, passes under the trigeminal ganglion and through the foramen ovale to unite with the sensory root just outside the skull.^[2]^{[better source needed]}

The mandibular nerve immediately passes between tensor veli palatini, which is medial, and lateral pterygoid, which is lateral, and gives off a meningeal branch (nervus spinosus) and the nerve to medial pterygoid from its medial side. The nerve then divides into a small anterior division and a large posterior division.

Branches

The mandibular nerve gives off the following branches:

From the main trunk (before the division):
- meningeal branch (nervus spinosus) (sensory)
- medial pterygoid nerve (motor)
From the anterior division:
- masseteric nerve (mixed)
- deep temporal nerves (mixed)
- buccal nerve (sensory)
- lateral pterygoid nerve (motor)
From the posterior division:
- auriculotemporal nerve (sensory)
- lingual nerve (sensory)
- inferior alveolar nerve (mixed)
  - mylohyoid nerve (motor)
  - incisive branch (sensory)
  - mental nerve (sensory)

Distribution

Anterior Division

(Motor Innervation - Muscles of mastication)

(Sensory Innervation)

Buccal nerve
- Inside of the cheek (buccal mucosa)
Nervous spinosus (sensory)

Posterior Division

Lingual Split
(general sensory innervation (not special sensory for taste))

Anterior 2/3 of Tongue (mucous membrane)

Inferior Alveolar Split
(Motor Innervation)

Mylohyoid
Digastric (Anterior Belly)

(Sensory Innervation)

Teeth and Mucoperiosteum of mandibular teeth
Chin and Lower Lip

Auriculotemporal Split

Scalp (auricula / temporal region)

Additional images

Dermatome distribution of the trigeminal nerve
The nerves of the scalp, face, and side of neck.
Mandibular nerve
Mandibular nerve

References

^ Rodella, L.F.; Buffoli, B.; Labanca, M.; Rezzani, R. (April 2012). "A review of the mandibular and maxillary nerve supplies and their clinical relevance". Archives of Oral Biology. 57 (4): 323–334. doi:10.1016/j.archoralbio.2011.09.007. ISSN 0003-9969. PMID 21996489.
^ Burchiel, K J (November 1, 2003). "A New Classification for Facial Pain". Neurosurgery. 53 (5): 1164–1167. doi:10.1227/01.NEU.0000088806.11659.D8. PMID 14580284. S2CID 33538452.

External links

MedEd at Loyola GrossAnatomy/h_n/cn/cn1/cnb3.htm
Anatomy figure: 27:03-02 at Human Anatomy Online, SUNY Downstate Medical Center
cranialnerves at The Anatomy Lesson by Wesley Norman (Georgetown University) (V)

[1] Rodella, L.F.; Buffoli, B.; Labanca, M.; Rezzani, R. (April 2012). "A review of the mandibular and maxillary nerve supplies and their clinical relevance". Archives of Oral Biology. 57 (4): 323–334. doi:10.1016/j.archoralbio.2011.09.007. ISSN 0003-9969. PMID 21996489.

[2] Burchiel, K J (November 1, 2003). "A New Classification for Facial Pain". Neurosurgery. 53 (5): 1164–1167. doi:10.1227/01.NEU.0000088806.11659.D8. PMID 14580284. S2CID 33538452.

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