What is the major nerve to the TMJ responsible for pain in TMJ syndrome?

• A. Inferior alveolar nerve
• B. Zygomaticotemporal nerve
• C. Buccal nerve
• D. Auriculotemporal nerve

Answer: (D)

Pain from the TMJ is carried mainly by the auriculotemporal nerve, a branch of the mandibular division of the trigeminal nerve. This nerve provides sensory innervation to the TMJ capsule and synovial lining, so it transmits the pain signals associated with TMJ dysfunction. Its fibers travel with the auricular region, which explains why TMJ pain can be felt in the temple and ear areas.

The other nerves listed don’t innervate the TMJ as their primary role: the inferior alveolar nerve mainly supplies the lower teeth and chin; the buccal nerve serves the cheek mucosa and buccinator; the zygomaticotemporal nerve supplies the skin of the temple.