What is true about the TMJ articular surfaces?

Correct answer: C. It consists of fibrocartilage

• A. The TMJ DOES have an articular disc (meniscus) that divides the joint into superior and inferior compartments.
• B. The TMJ is innervated by branches of the auriculotemporal nerve and masseteric nerve — both branches of CN V3 (trigeminal). Not the glossopharyngeal (CN IX).
• C. The articular surfaces of the TMJ (condyle, articular eminence, and the articular disc) are covered by FIBROCARTILAGE — NOT hyaline cartilage. This is unique because most synovial joints in the body have hyaline cartilage on their articular surfaces. Fibrocartilage in the TMJ provides greater resilience to compressive forces and better repair capacity.
• D. Hyaline cartilage covers most synovial joints but NOT the TMJ. The TMJ is specifically covered by fibrocartilage.