Muscles of Mastication

Question 1

What muscle is indicated in this image?

Answer 1

Temporalis muscle

Question 2

Name muscle A.

Answer 2

Lateral pterygoid muscle

Question 3

Name muscle B.

Answer 3

medial pterygoid muscle.

Question 4

Name the muscle indicated in this image.

Answer 4

Masseter

Question 5

Describe the origin of the temporalis muscle.

Answer 5

Temporal fossa and fascia

Question 6

Describe the insertion of the temporalis muscle.

Answer 6

Coronoid process and ramus of mandible.

Question 7

Describe the action of the temporalis muscle.

Answer 7

Elevates and retracts mandible.

Question 8

Describe the innervation of the temporalis muscle.

Answer 8

Anterior and posterior deep temporal nerves.

Question 9

Describe the blood supply of the temporalis muscle.

Answer 9

Anterior and posterior deep temporal arteries and middle temporal artery.

Question 10

Describe the origin of the superior head of the lateral pterygoid muscle.

Answer 10

Infratemporal surface and infratemporal crest of greater wing of sphenoid bone

Question 11

Describe the origin of the inferior head of the lateral pterygoid muscle.

Answer 11

Lateral surface of lateral pterygoid plate of sphenoid bone.

Question 12

Describe the insertion of the lateral pterygoid muscle.

Answer 12

Neck of mandible

Question 13

Describe the action of the lateral pterygoid muscle.

Answer 13

Laterally moves and protracts mandible.

Question 14

Describe the innervation of the lateral pterygoid muscle.

Answer 14

Nerve to lateral pterygoid muscle.

Question 15

Describe the blood supply of the lateral pterygoid muscle.

Answer 15

Pterygoid branches of maxillary artery and ascending palatine artery.

Question 16

Describe the origin of the medial pterygoid muscle.

Answer 16

Medial surface of lateral pterygoid plate of sphenoid bone, maxillary tuberosity, pyramidal process of palatine bone.

Question 17

Describe the insertion of the medial pterygoid muscle.

Answer 17

Medial surface of ramus and angle of the mandible.

Question 18

Describe the action of the medial pterygoid muscle.

Answer 18

Laterally moves and protracts mandible.

Question 19

Describe the innervation of the medial pterygoid muscle.

Answer 19

Nerve to medial pterygoid muscle.

Question 20

Describe the blood supply of the medial pterygoid muscle.

Answer 20

Pterygoid branches of maxillary artery.

Question 21

Describe the origin of the masseter.

Answer 21

Inferior aspect of zygomatic arch.

Question 22

Describe the insertion of the masseter.

Answer 22

Lateral aspect of coronoid process and ramus of mandible.

Question 23

Describe the action of the masseter.

Answer 23

Elevates mandible; assists in protraction of mandible.

Question 24

Describe the innervation of the masseter.

Answer 24

Masseteric nerve

Question 25

Describe the blood supply of the masseter.

Answer 25

Masseteric, transverse facial, and facial arteries.