Muscles of mastication

Question 1

what do they do?

Answer 1

Responsible for the mandible for mastication

Question 2

Which ones are they?

Answer 2

• Temporalis
• Masseter
• Lateral pterygoid
• medial pterygoid

Question 3

What happens when the anterior fibres of the temporals muscle contract?

Answer 3

elevation of the mandible

Question 4

What happens when the posterior fibres of the temporals contract?

Answer 4

Retraction of the mandible

Question 5

Bony attachments of the masseter?

Answer 5

• Maxillary process of zygomatic bone

- Ramus and coronoid process of mandible

Question 6

Action of the masseter?

Answer 6

Elevates the mandible

Question 7

Lateral pterygoid muscle attachment

Answer 7

Lateral side of lateral pterygoid plate

Question 8

Medial pterygoid muscle attachment

Answer 8

Medial aspect of lateral pterygoid plate

Question 9

What happens when both lateral pterygoid muscles contract?

Answer 9

Protrusion of jaw

Question 10

What happens when ipsilateral pterygoid muscles contract

Answer 10

side to side movement of jaw

Question 11

what happens when both medial pterygoid muscles contract?

Answer 11

elevation of jaw

Question 12

Innervation of the muscles of mastication?

Answer 12

• V3
• Through foramen ovale
• Into the infra temporal fossa
• Infraalveolar nerve carries sensory information to the mandible