Medial pterygoid muscle

From Freepedia

The medial pterygoid is a muscle of mastication with two heads. The deep head originates on the medial side of the lateral pterygoid plate behind the upper teeth, and the superficial head on the maxillary tuberosity; both insert onto the medial angle of the mandible. It acts to elevate the mandible, close the jaw, and help the lateral pterygoids in moving the jaw from side to side. It is supplied by the nerve to medial pterygoid from the mandibular nerve.

Muscles of the head

facial expression: Auricularis anterior muscle - Buccinator muscle - Corrugator supercilii muscle - Depressor anguli oris muscle - Depressor labii inferioris muscle - Depressor septi nasi muscle - Frontalis muscle - Levator anguli oris muscle - Levator labii supeioris muscle - Levator labii superioris alaeque nasi muscle - Levator palpebrae superioris muscle - Mentalis muscle - Nasalis muscle - Occipitalis muscle - Orbicularis oculi muscle - Orbicularis oris muscle - Platysma - Procerus muscle - Risorius muscle - Zygomaticus major muscle - Zygomaticus minor muscle mastication: Lateral pterygoid muscle - Masseter muscle - Medial pterygoid muscle - Temporalis muscle extraocular: Inferior oblique muscle - Inferior rectus muscle - Lateral rectus muscle - Medial rectus muscle - Superior oblique muscle - Superior rectus muscle intraocular: Ciliary body - Iris dilator muscle - Iris sphincter muscle