Medial Pterygoid


The action of the medial pterygoid muscle initiate elevation of the mandible. It also assits the mandible in moving from side to side.


Pterygoid fossa (medial surface of the lateral pterygoid plate and the lateral surface of the medial pterygoid plate).


The medial pterygoid muscle inserts onto the medial surface of the ramus and the angle of the mandible.


The V3 (mandibular) branch of the trigeminal nerve (cranial nerve V) innervates the temporalis muscle.

Lateral view of the medial and lateral pterygoid muscles

Image by Jessica Fitzgerald. Adapted from an image in the BMS225 handbook.