Masseter Muscle - Attachments, Actions & Innervation
Lateral Pterygoid Muscle – Attachments, Actions & Innervation
Attachments of Lateral Pterygoid Muscle: Origin & Insertion
Origin: (proximal attachments):
a. Superior head: greater wing of sphenoid bone.
a. Inferior head: lateral surface of lateral pterygoid plate.
Insertion: (distal attachments):
Condyle of mandible and temporomandibular joint.
Actions of Lateral Pterygoid Muscle on the mandible:
a. Protract (or protrude) mandible.
b. Depress mandible.
Individually: they move the mandible side to side.
Nerve to Muscle and its Spinal Segment:
Mandibular branch of trigemminal nerve (V).