external pterygoid muscle, one of the four short, thick, somewhat conical muscles of mastication that function to open the jaws, protrude the mandible, and move the mandible from side to side. Also called pterygoideus lateralis.
external pterygoid muscle, one of the four short, thick, somewhat conical muscles of mastication that function to open the jaws, protrude the mandible, and move the mandible from side to side. Also called pterygoideus lateralis.