Head and Neck Part 2 (Muscles)

Question 1

Frontalis

Answer 1

elevates eyebrow

Question 2

Orbicularis Oculi

Answer 2

Closes eye

Question 3

Levator palpebrae superioris

Answer 3

raises eyelid

Question 4

Zygomaticus major

Answer 4

origin: zygomatic bone
insert: facial node
Action: pulls facial node superior and lateral

Question 5

Zygomaticus minor

Answer 5

origin: zygomatic bone
insertion: facial node
action: pulls facial node superior and lateral

Question 6

Risorius

Answer 6

pulls facial node laterally

Question 7

Depressor anguli oris

Answer 7

pulls facial node inferiorly

Question 8

Orbicularis oris

Answer 8

purses lips

Question 9

Platysma:

Answer 9

pulls facial nodes downward

Question 10

Temporalis

Answer 10

origin: temporal fossa
insertion: coronoid process
action: elevates mandible

Question 11

Masseter

Answer 11

origin: zygomatic arch
insertion: lateral ramus mandible
action: elevates and protracts mandible

Question 12

Medial pterygoid muscle

Answer 12

origin: medial pterygoid plate
insertion: medial ramus mandible
action: medially moves mandible

Question 13

lateral pterygoid muscle

Answer 13

origin: lateral pterygoid plate
insertion: condylar process mandible
action: protracts mandible

Question 14

Intrinsic:

Answer 14

begins and ends (origin and insertion) within structure

Question 15

Extrinsic

Answer 15

begins (origin) outside structure ends (insertion) within the structure

Question 16

Digastric

Answer 16

origin: anterior belly- posterior mandible posterior belly- mastoid groove
insertion: hyoid bone
action: depresses mandible elevates hyoid

Question 17

Sternocleidomastoid

Answer 17

origin: sternum and clavicle
insertion: mastoid process
action: rotates neck and lateral flexion neck and head

Question 18

Scalenes

Answer 18

origin: cervical vertebrae
insertion: ribs 1 and 2
action: lateral flexion neck