Muscles of Mastication

Question 1

Masseter - Attachments

Answer 1

FROM
*zygomatic arch

TO
*angle of the mandible
*lateral aspect of the ramus

Question 2

Masseter - Actions

Answer 2

elevation, protraction and retraction (deep fibers) of the mandible

Question 3

Masseter - Innervation

Answer 3

mandibular nerve (V3)

Question 4

Temporalis - Attachments

Answer 4

FROM
*temporal fossa

TO
*coronoid process
*anterior border of the ramus of the mandible

Question 5

Temporalis - Actions

Answer 5

elevation & retraction (posterior aspect of the muscle) of the mandible

Question 6

Temporalis - Innervation

Answer 6

mandibular nerve (V3)

Question 7

Lateral pterygoid - Attachments

Answer 7

FROM
*infratemporal surface of the sphenoid
*lateral surface of the lateral pterygoid plate

TO
*neck of the mandible
*TMJ disc

Question 8

Lateral pterygoid - Actions

Answer 8

depresses mandible, protracts & acts with the ipsilateral medial pterygoid to rotate the mandible to produce the side-to-side movements during chewing

Question 9

Lateral pterygoid - Innervation

Answer 9

mandibular nerve (V3)

Question 10

Medial pterygoid - Attachments

Answer 10

FROM
*medial surface of the lateral pterygoid plate
*adjacent maxilla

TO
*medial aspect of the angle of the mandible

Question 11

Medial pterygoid - Actions

Answer 11

elevation of the mandible & acts with the ipsilateral lateral pterygoid to rotate the mandible to produce the side-to-side movements during trituration of food

Question 12

Medial pterygoid - Innervation

Answer 12

mandibular nerve (V3)