Medial pterygoid is a thick quadrilateral muscle that connects the mandible with maxilla, sphenoid and palatine bones. It belongs to the group of masticatory muscles, along with the lateral pterygoid, masseter and temporal muscles. Medial pterygoid muscle consists of two heads; superficial and deep. Although having different origins, both heads insert on the inner surface of mandible, creating an axis for a strong pull of this bone. Unilateral contraction of medial pterygoid causes rotation of m