Muscles of Mastication

Question 1

Temporalis Muscle Origin

Answer 1

temporal fossa and fascia

Question 2

Temporalis Muscle Insertion

Answer 2

coronoid process and anterior border of ramus of mandible

Question 3

Action of Temporalis muscle

Answer 3

elevate and retrude the mandible

Question 4

Masseter Muscle origin(Superficial head)

Answer 4

Anterior 2/3 of zygomatic arch

Question 5

Masster Muscle Origin(Deep head)

Answer 5

inner aspect of zygomatic arch and inner border of post. 1/3.

Question 6

Action of Masseter (Superficial head )

Answer 6

elevate, protrude the mandible

Question 7

Action of Masseter (deep head )

Answer 7

retrude from a protruded position.

Question 8

Lateral Pterygoid (superior head) origin

Answer 8

Roof of infratemporal fossa – greater wing of sphenoid

Question 9

Lateral Pterygoid (inferior head) origin

Answer 9

– Lateral surface of lateral pterygoid plate

Question 10

Lateral Pterygoid (superior head) insertion

Answer 10

Pterygoid fovea, TMJ capsule and disc

Question 11

Lateral Pterygoid( inferior head) insertion

Answer 11

Pterygoid fovea

Question 12

Lateral Pterygoid action

Answer 12

Acting alone – move mandible to opposite side

Acting together – protrude the mandible, pulls articular disc forward, depress

Question 13

Medial pterygoid origin

Answer 13

Medial surface of lateral pterygoid plate and maxillary tuberosity

Question 14

Medial pterygoid insertion

Answer 14

Medial surface of ramus of mandible

Question 15

Medial pterygoid action

Answer 15

elevate and protrude the mandible

Question 16

Buccinator muscle origin

Answer 16

pterygomandibular raphae, buccal alveolar process of mandible and maxilla

Question 17

Buccinator muscle insertion

Answer 17

Orbicularis oris fibers

Question 18

Buccinator muscle action

Answer 18

compress cheeks to pushes food onto the teeth

Question 19

Buccinator muscle nereve

Answer 19

Facial VII