Which two nerves are responsible for the innervation of the TMJ?

• A. Masseteric and Auriculotemporal
• B. Inferior Alveolar and Lingual
• C. Glossopharyngeal and Hypoglossal
• D. Facial and Trigeminal

Answer: (A)

Innervation of the TMJ comes from branches of the mandibular division of the trigeminal nerve, supplying the joint capsule and surrounding structures. The two nerves most directly responsible are the auriculotemporal nerve and the masseteric nerve. The auriculotemporal nerve travels near the TMJ and provides the bulk of sensory input to the joint capsule and synovial lining, plus proprioceptive signals that help coordinate jaw movements. The masseteric nerve, while primarily motor to the masseter, also gives a small articular branch to the TMJ, contributing additional sensory innervation during jaw action.

The other options don’t fit because the inferior alveolar nerve mainly supplies the mandibular teeth and associated mucosa, the lingual nerve serves the tongue and floor of the mouth, and glossopharyngeal and hypoglossal nerves are not involved in TMJ innervation. The facial nerve is motor to facial muscles, not the TMJ.