Muscles for Mastication (TIME)

Question 1

temporalis (origin)

Answer 1

temporal fossa of temporalis and sphenoid

Question 2

temporalis (insertion)

Answer 2

coronoid process of mandible

Question 3

temporalis (nerve)

Answer 3

mandibular branch (V3) of trigeminal nerve (CN V)

Question 4

temporalis (action)

Answer 4

anterior fibers: closes (elevates) jaw
middle and posterior fibers: retracts mandible (opens jaw)

Question 5

medial/internal pterygoid (origin)

Answer 5

medial surface of lateral pterygoid plate

Question 6

medial/internal pterygoid (insertion)

Answer 6

medial aspect of angle of mandible

Question 7

medial/internal pterygoid (nerve)

Answer 7

mandibular branch (V3) of trigeminal nerve (CN V)

Question 8

medial/internal pterygoid (action)

Answer 8

closes (elevates) jaw

Question 9

masseter (origin)

Answer 9

zygomatic arch of temporalis

Question 10

masseter (insertion)

Answer 10

angle of mandible

Question 11

masseter (nerve)

Answer 11

mandibular branch (V3) of trigeminal nerve (CN V)

Question 12

masseter (action)

Answer 12

closes (elevates) jaw

Question 13

lateral/external pterygoid (origin)

Answer 13

superior head: greater wing of sphenoid
inferior head: lateral pterygoid plate

Question 14

lateral/external pterygoid (insertion)

Answer 14

joint capsule of condylar process

Question 15

lateral/external pterygoid (nerve)

Answer 15

mandibular branch (V3) of trigeminal nerve (CN V)

Question 16

lateral/external pterygoid (action)

Answer 16

protrusion of the jaw

only muscle of masticators to protrude the jaw