what is pterygoid
Definition of PTERYGOID. : of, relating to, or lying in the region of the inferior part of the sphenoid bone of the vertebrate skull.ADVERTISEMENT. of, relating to, or lying in the region of the inferior part of the sphenoid bone of the vertebrate skull.
The medial pterygoid (or internal pterygoid muscle), is a thick, quadrilateral muscle of mastication.The mandibular branch of the fifth cranial nerve, the trigeminal nerve, innervates the medial pterygoid muscle.nlike the lateral pterygoid and all other muscles of mastication which are innervated by the anterior division of the mandibular branch of the trigeminal nerve, the medial pterygoid is innervated by the main trunk of the mandibular branch of the trigeminal nerve (V), before the division.