muscles of the head & neck

Question 1

origin of frontal belly of occipitofrontalis

Answer 1

epicranial aponeurosis

Question 2

insertation of frontal belly of occipitofrontalis

Answer 2

skin/subcutaneous layer of forehead and eyebrows

Question 3

action of frontal belly of occipitofrontalis

Answer 3

raises eyebrows and wrinkles the skin of the forehead

Question 4

origin of the occipital belly of the occipitofrontalis

Answer 4

superior nuchal line

Question 5

insertion of the occipital belly of the occipitofrontalis

Answer 5

galea aponeurotica

Question 6

action of the occipital belly of the occipitofrontalis

Answer 6

retracts scalp

Question 7

origin of orbicularis oris

Answer 7

maxilla and mandible

Question 8

insertion of orbicular oris

Answer 8

lips/skin around mouth

Question 9

action of orbicular oris

Answer 9

closes lips, puckers

Question 10

origin of masseter

Answer 10

zygomatic arch

Question 11

insertion of masseter

Answer 11

lateral surface of ramus and angle of mandible

Question 12

action of masseter

Answer 12

elevates and protracts mandible

Question 13

origin of temporalis

Answer 13

temporal bone

Question 14

insertion of temporalis

Answer 14

coronoid process of mandible

Question 15

action of temporalis

Answer 15

elevates and retracts mandible

Question 16

origin of buccinator

Answer 16

alveolar processes of maxilla and mandible

Question 17

insertion of buccinator

Answer 17

orbicularis oris

Question 18

action of buccinator

Answer 18

compressing cheek (sucking)

Question 19

origin of medial pterygoid

Answer 19

pterygoid process of sphenoidal bone

Question 20

origin of lateral pterygoid

Answer 20

greater wing and pterygoid process of spenoidal bone

Question 21

insertion of medial pterygoid

Answer 21

medial surface of mandibular ramus

Question 22

insertion of lateral pterygoid

Answer 22

mandibular condyle

Question 23

action of medial pterygoid

Answer 23

elevates and protracts mandible and moves it lateral (grinding)

Question 24

action of lateral pterygoid

Answer 24

elevates and protracts mandible and moves it laterally

Question 25

origin of sternocleidomastoids

Answer 25

manubrium and sternal end of clavicles

Question 26

insertion of sternocleidomastoids

Answer 26

mastoid process of temporal bone

Question 27

action of sternocleidomastoids

Answer 27

pulls head forward (when both contract). head turns opposite direction (when one side contracts)

Question 28

origin of platysma

Answer 28

fascia of deltoid and pectoralis major and acromionn of scapula

Question 29

insertion of platysma

Answer 29

skin of cheek and mandible

Question 30

action of platysma

Answer 30

pulls lower lip inferiorly, tenses skin of neck, contributes to depression of mandible

Question 31

origin of splenius capitus

Answer 31

ligamentum nuchae

Question 32

insertion of splenius capitus

Answer 32

occipital bone and mastoid process of temporal bone

Question 33

action of splenius capitus

Answer 33

extends head and neck

Question 34

origin of semispinalis capitus

Answer 34

C4-T6

Question 35

insertion of semispinalis capitus

Answer 35

between superior and inferior nuchal line

Question 36

action of semispinalis capitus

Answer 36

extends head and neck