Which of the following muscles has two separate functions in mandibular
movement
1) Masseter
2) Geniohyoid
3) External(lateral)pterygoid
4) Buccinator
📝 Explanation:
The external (lateral) pterygoid muscle has two primary functions: it assists in depressing the mandible (opening the mouth) and in moving the mandible forward (protrusion). This dual function distinguishes it from other muscles of mastication, which primarily elevate the mandible.