Which muscle attaches to the articular disc of the temporomandibular joint?

• A. Masseter
• B. Lateral pterygoid
• C. Medial pterygoid
• D. Temporalis

Answer: (B)

The articular disc of the temporomandibular joint is attached to the superior head of the lateral pterygoid. This connection lets the disc move with the condyle as the jaw opens and translates forward. The superior head of the lateral pterygoid inserts into the articular disc and the joint capsule, while its inferior head attaches to the neck of the mandible. When the lateral pterygoid contracts, it pulls the disc (and the condyle) anteriorly, helping the joint glide smoothly. The other muscles listed—masseter, temporalis, and medial pterygoid—attach to the mandible or skull bones but not to the articular disc, so they don’t anchor the disc.