Muscles of Mastication

Question 1

Masseter

Answer 1

O - Inferior border and medial surface of maxillary process of zygomatic bone, and zygomatic arch
I - Angle & lateral surface of ramus of mandible

Question 2

Temporalis

Answer 2

O - temporal fossa, and deep temporal fascia

I - Tip & medial surface of coronoid process (deep to zygomatic arch), and anterior border of ramus of mandible

Question 3

Medial Pterygoid

Answer 3

O - Medial surface of lateral pterygoid plate of sphenoid bone and pyramidal surface of palatine bone, and tuberosity of maxilla
I - Medial surface of ramus of mandible, inferior to mandibular foramen

Question 4

Lateral Pterygoid

Answer 4

O - Crest of greater wing (infratemporal crest) and lateral surface of lateral pterygoid plate of sphenoid bone
I - Upper Head: joint capsule and articular disc of TMJ; Inferior Head: pterygoid fovea on anteromedial aspect of neck of condyloid process of mandible