MUSCLES OF MASTICATION

Question 1

what are the muscles of mastication?

Answer 1

lateral pterygoid m
medial pterygoid m
temporalis m
masseter m

Question 2

innervation of these muscles?

Answer 2

mandibular branch of V3

Question 3

origin of the temporalis m?

Answer 3

temporal fossa

Question 4

insertion of the temporalis m?

Answer 4

coronoid process of the mandible

Question 5

action of the temporalis m?

Answer 5

anterior 2/3- elevate and clench mandible

posterior 1/3-retract mandible

Question 6

origin of the masseter m?

Answer 6

superficial belly- anterior 2/3 of lower border of the zygomatic arch
deep belly- zygomatic process of the temporal bone

Question 7

insertion of the masseter m?

Answer 7

lateral surface of ramus, coronoid process, and angle of mandible

Question 8

action of the masseter m?

Answer 8

elevate and clench mandible

Question 9

origin of the medial pterygoid m?

Answer 9

medial surface of the lateral pterygoid plate

Question 10

insertion of the medial pterygoid m?

Answer 10

posterior part of medial surface of ramus

Question 11

action of the medial pterygoid m?

Answer 11

protract and elevate mandible

Question 12

origin of the lateral pterygoid m?

Answer 12

superior belly-infratemporal surface of the greater wing

inferior belly-lateral surface of the lateral pterygoid plate

Question 13

insertion of the lateral pterygoid m?

Answer 13

anterior portion of the condylar neck

Question 14

action of the lateral pterygoid m?

Answer 14

protract mandible