Muscles of Mastication

Question 1

Masseter (attachments)

Answer 1

zygomatic arch to angle of mandible & lateral aspect of ramus

Question 2

Masseter (action)

Answer 2

elevation, protraction & retraction (deep fibers) of mandible

Question 3

Masseter (innervation)

Answer 3

mandibular n. (from Trigeminal n.)

Question 4

Temporalis (attachments)

Answer 4

temporal fossa to coronoid process & anterior border of ramus of mandible

Question 5

Temporalis (action)

Answer 5

elevation & retraction (posterior aspect of muscle) of mandible

Question 6

Temporalis (innervation)

Answer 6

Mandibular n. (from Trigeminal n.)

Question 7

Lateral Pterygoid (attachments)

Answer 7

infratemporal surface of sphenoid & lateral surface of lateral pterygoid plate to neck of mandible & TMJ disc

Question 8

Lateral Pterygoid (action)

Answer 8

depresses mandible, protracts & acts w/ipsilateral medial pterygoid to rotate mandible to produce side-to-side movements during chewing

Question 9

Lateral Pterygoid (innervation)

Answer 9

mandibular n. (V3)

Question 10

Medial Pterygoid (attachments)

Answer 10

medial surface of lateral pterygoid plate & adjacent maxilla to medial aspect of angle of mandible

Question 11

Medial Pterygoid (action)

Answer 11

elevation of mandible & acts w/ipsilateral lateralpterygoid to rotate mandible to produce side-to-side movements during trituration of food

Question 12

Medial Pterygoid (innervation)

Answer 12

mandibular n. (from Trigeminal n.)