Mandibular muscles and muscles of mastication

Question 1

masseter

Answer 1

O: Zygomatic arch and maxillary process of the zygomatic bone

I: Lateral surface of the ramus of the mandible

N: Masseteric nerve from anterior trunk of the mandibular nerve

A: Elevation of the mandible

Question 2

Temporalis

Answer 2

O: Bone of temporal fossa and temporal fascia

I: Coronoid process of the mandible and anterior margin of the ramus of mandible

N: Deep temporal nerves from the anterior trunk of the mandibular nerve

A: Elevation and retraction of the mandible

Question 3

Medial pterygoid

Answer 3

O: Deep head: medial surface of lateral plate of pterygoid process and pyramidal process of palatine bone;
Superficial head: tuberosity and pyramidal process of maxilla

I: Medial surface of mandible near the angle

N: Nerve to medial pterygoid from the mandibular nerve

A: Elevation and side-to-side movements of the mandible

Question 4

Lateral pterygoid

Answer 4

O: Upper head: roof of infratemporal fossa
Lower head: lateral surface of lateral plate of the pterygoid process

I: Capsule of temporomandibular joint in the region of attachment to the articular disc and to the pterygoid fovea on the neck of the mandible

N: Nerve to lateral pterygoid directly from the anterior trunk of the mandibular nerve or from the buccal branch

A; Protrusion and side-to-side movements of the mandible