Buccal nerve

This article is about the Buccal branch of the Trigeminal Nerve. For the branch of the facial nerve, see Buccal branch of the facial nerve.

Buccal nerve
Sensory areas of the head, showing the general distribution of the three divisions of the trigeminal nerve (buccal nerve labeled at center left)
Mandibular division of the trigeminal nerve
Details
From	Mandibular nerve
Innervates	Lateral pterygoid muscle and cheek
Identifiers
Latin	Nervus buccalis
TA	A14.2.01.073
FMA	53066
*Anatomical terms of neuroanatomy* [edit on Wikidata]

The buccal nerve (long buccal nerve) is a nerve in the face. It is a branch of the mandibular nerve (which is itself a branch of the trigeminal nerve) and transmits sensory information from skin over the buccal membrane (in general, the cheek) and from the second and third molar teeth. Not to be confused with the buccal branch of the facial nerve which transmits motor information to the buccinator muscle.

Structure

It courses between the two heads of the lateral pterygoid muscle, underneath the tendon of the temporalis muscle, and then under the masseter muscle to connect with the buccal branches of the facial nerve on the surface of the buccinator muscle.

Function

Small branches of the buccal nerve innervate the lateral pterygoid muscle. It also gives sensory branches to the cheek.

Related nerves

The facial nerve (CN VII) also has buccal branches, which carry motor innervation to the buccinator muscle, a muscle of facial expression. This follows from the trigeminal (V3) supplying all muscles of mastication and the facial (VII) supplying all muscles of facial expression.

Additional images

The nerves of the scalp, face, and side of neck.
Infaorbital and buccal nerve.Superficial dissection.Lateral view.

References

"Nerve, buccal." Stedman's Medical Dictionary, 27th ed. (2000). ISBN 0-683-40007-X
Gray's Anatomy: The Anatomical Basis of Clinical Practice. (2005). ISBN 0-443-07168-3

External links

Anatomy figure: 27:03-03 at Human Anatomy Online, SUNY Downstate Medical Center
MedEd at Loyola GrossAnatomy/h_n/cn/cn1/cnb3.htm
lesson4 at The Anatomy Lesson by Wesley Norman (Georgetown University) (mandibularnerve)
cranialnerves at The Anatomy Lesson by Wesley Norman (Georgetown University) (V)

The trigeminal nerve

ophthalmic (V1)

frontal	supratrochlear supraorbital lateral branch medial branch

nasociliary	long ciliary infratrochlear posterior ethmoidal anterior ethmoidal external nasal internal nasal sensory root of ciliary ganglion ciliary ganglion

other	lacrimal

maxillary (V2)

in meninges

middle meningeal

in pterygopalatine fossa

zygomatic
- zygomaticotemporal
- zygomaticofacial
pterygopalatine
- pterygopalatine ganglion see below for details
posterior superior alveolar

in infraorbital canal

infraorbital nerve:	superior alveolar anterior middle posterior internal nasal branches

on face

mandibular (V3)

in meninges	meningeal

anterior	to muscles of mastication medial pterygoid/to tensor veli palatini lateral pterygoid masseteric deep temporal buccal

posterior	auriculotemporal otic ganglion lingual submandibular ganglion inferior alveolar mylohyoid mental

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