Which muscle elevates the jaw?

Which muscle elevates the jaw?

• A. Medial pterygoid
• B. Lateral pterygoid
• C. Suprahyoid
• D. Infrahyoid

Answer: (A)

Closing the jaw is accomplished by mandibular elevators, with the medial pterygoid acting as a key contributor. Its fibers pull the mandible upward, elevating the jaw and helping to bring the teeth together. It works in concert with the masseter and temporalis to produce a strong bite, and it also assists with grinding movements when paired with the lateral pterygoid. The lateral pterygoid, by contrast, mainly assists in opening the jaw and protruding it rather than elevating. The suprahyoid and infrahyoid muscles move the hyoid bone and play a role in jaw mechanics indirectly, but they are not primary jaw elevators.

Closing the jaw is accomplished by mandibular elevators, with the medial pterygoid acting as a key contributor. Its fibers pull the mandible upward, elevating the jaw and helping to bring the teeth together. It works in concert with the masseter and temporalis to produce a strong bite, and it also assists with grinding movements when paired with the lateral pterygoid. The lateral pterygoid, by contrast, mainly assists in opening the jaw and protruding it rather than elevating. The suprahyoid and infrahyoid muscles move the hyoid bone and play a role in jaw mechanics indirectly, but they are not primary jaw elevators.