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Masseteric nerve

Branch of the mandibular nerve

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Structure

Origin

The masseteric nerve is a branch of (the anterior division of) the mandibular nerve (CN V3) (itself a branch of the trigeminal nerve (CN V)).

Course

It passes laterally superior to the lateral pterygoid muscle, anterior to the temporomandibular joint, and posterior to the tendon of the temporalis muscle. It crosses (the posterior portion of) the mandibular notch alongside the masseteric artery before branching out upon the surface of the masseter muscle, then entering the muscle.

Distribution

The masseteric nerve provides motor innervation the masseter muscle. It additionally sends articular (sensory) branches to the temporomandibular joint.

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