Lateral Pterygoid Muscle - Attachments, Actions & Innervation
Medial Pterygoid Muscle – Attachments, Actions & Innervation
Attachments of Medial Pterygoid Muscle: Origin & Insertion
Origin: (proximal attachments):
a. Superficial head: tuberosity of maxilla.
a. Deep head: medial surface of lateral pterygoid plate and palatine bone.
Insertion: (distal attachments):
Medial surface of ramus and angle of mandible.
Actions of Medial Pterygoid Muscle on the mandible:
a. Elevate mandible.
b. Protract (or protrude) mandible.
Individually: they move the mandible side to side.
Nerve to Muscle and its Spinal Segment:
Mandibular branch of trigemminal nerve (V).