Everything about The Mandibular Nerve totally explained
The
mandibular nerve (V
3) is the largest of the three branches of the
trigeminal nerve.
Structure
Roots
It is made up of two roots:
- a large sensory root proceeding from the inferior angle of the trigeminal ganglion.
- a small motor root (the motor part of the trigeminal), which passes beneath the ganglion, and unites with the sensory root, just after its exit through the foramen ovale.
Path
The two roots (sensory and motor) exit the
middle cranial fossa through the
foramen ovale. The two roots then combine. The nerve descends, soon splitting into an anterior division and a posterior division.
Immediately in the
infratemporal fossa beneath the base of the skull, the nerve gives off two branches from its medial side: a recurrent branch (
nervus spinosus) and the nerve to the
medial pterygoid muscle. The mandibular nerve then divides into two trunks, an anterior and a posterior.
Branches
The mandibular nerve gives off the following branches:
From the main trunk of the nerve (before the division)
From the anterior division
From the posterior division
The mandibular nerve also gives off branches to the otic ganglion
Supplies
The mandibular nerve innervates:
mucous membrane of the anterior two-thirds of the tongue
the inside of the cheek (the buccal mucosa)
teeth and gums of the mandible
skin of the temporal region
auricula
lower lip, and chin
muscles of mastication
the muscles tensor tympani and tensor veli palatiniFurther Information
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