The Muscles of Mastication

Question 1

What are the muscles of mastication?

Answer 1

Temproalis

Masseter

Lateral pterygoid

Medial pterygoid

Question 2

Answer 2

Question 3

Answer 3

Question 4

What are the bony attachments of the temporalis muscle?

Answer 4

• Temporal fossa*
• Coronoid process of the mandible*

Question 5

The anterior fibres of the temporalis contract

Answer 5

Elevatio and chewing

Question 6

The posterior fibres of the temporalis contract?

Answer 6

Retraction

Question 7

Boney attachments of the masseter?

Answer 7

Zygomatic arch

Outer surface of the ramus and coronoid process of the mandible

Question 8

What is the masseters action?

Answer 8

Elevate the jaw- Main chewing muscle

Question 9

Answer 9

Question 10

What does the lateral pterygoid muscle attach to?

Answer 10

The lateral surface of the lateral pterygoid plate

Question 11

What does the medial pterygoig muscle attach to?

Answer 11

The medial surface of the lateral pterygoid plate

Question 12

What is the attachment of the pterygoid to the mandible like?

Answer 12

The lateral pterygoid muscle enters into the joint capsule of the TMJ to insert onto the neck of the mandible and also the articular disc of this joint.

Question 13

To which part of the mandible does the medial pterygoid muscle attach?

Answer 13

Coronoid process

Question 14

When the two lateral pterygoid muscles contract they cause what?

Answer 14

Pertrusion of the mandible

Question 15

When the lateral pterygoid muscle contracts with the medial pterygoid of the same side it causes what?

Answer 15

Unilateral sing to the contralateral side

Question 16

When the two medial pterygoid muscles contract they cause?

Answer 16

Elevation of mandible- can also cause protrusion

Question 17

Answer 17

Question 18

Answer 18

Question 19

What muscles cause elevation of the mandible?

Answer 19

Medial pterygoid

Temporalis

Masseter

Question 20

What muscles cause depression of the mandible?

Answer 20

• Lateral Pterygoid*
• Mylohyoid & Geniohyoid*
• Anterior Digastric*

Question 21

What causes protrusion of the mandible?

Answer 21

Lateral pterygoid

Question 22

What causes retraction of the mandible?

Answer 22

Temporalis

Question 23

What causes side to side movement of the mandible?

Answer 23

Medial and lateral pterygoid

Question 24

WHat is innervation of the muscles of mastication done by?

Answer 24

Branches of the mandibular division of the trigeminal nerve

Question 25

What is the only division of the mandible that carries both sensory and motor?

Answer 25

CNV3

Question 26

What does the trigeminal nerve emerge from the cranial cavity through?

Answer 26

Ovale foramem

Question 27

In the infratemporal dossa what do its motor branches supply?

Answer 27

The muscles of mastication

Question 28

What does the inferior alveolar nerve do?

Answer 28

Enters into the mandibular foramen and provides sensory innervation to the mandibular area

Question 29

Answer 29