1/2 AOI

Question 1

frontalis action

Answer 1

raises eyebrows

Question 2

frontalis origin

Answer 2

epicranial aponeurosis

Question 3

frontalis insertion

Answer 3

skin of eyebrows and root of nose

Question 4

occipitalis action

Answer 4

pulls scalp posteriorly

Question 5

occipitalis origin

Answer 5

occipital and temporal bones

Question 6

occipitalis insertion

Answer 6

epicranial aponeurosis

Question 7

temporalis action

Answer 7

closes jaw, elevates and retracts mandible

Question 8

temporalis origin

Answer 8

temporal fossa

Question 9

temporalis insertion

Answer 9

coronoid process of mandible

Question 10

masseter action

Answer 10

prime mover of jaw closure, elevates mandible

Question 11

masseter origin

Answer 11

zygomatic arch and zygomatic bone

Question 12

masseter insertion

Answer 12

angle and ramus of manidble

Question 13

medial pterygoid action

Answer 13

acts with lateral pterygoid muscle to protrude mandible and promote side-to-side action

Question 14

medial pterygoid origin

Answer 14

medial surface of lateral pterygoid plate of sphenoid bone, maxilla and palatine bone

Question 15

medial pterygoid insertion

Answer 15

medial surface of mandible near angle

Question 16

lateral pterygoid action

Answer 16

forward sliding and side-to-side grinding movements of lower teeth

Question 17

lateral pterygoid origin

Answer 17

greater wing and lateral pterygoid plate of sphenoid bone

Question 18

lateral pterygoid insertion

Answer 18

condyle of mandible and temporomandibular joint

Question 19

zygomaticus action

Answer 19

raises lateral corners of mouth upwards

Question 20

zygomaticus origin

Answer 20

zygomatic bone

Question 21

zygomaticus insertion

Answer 21

skin and muscle at the corner of mouth

Question 22

buccinator is the muscle of…

Answer 22

mastication

Question 23

buccinator action

Answer 23

compresses cheek and draws mouth laterally

Question 24

buccinator origin

Answer 24

molar region of maxilla and mandible

Question 25

buccinator insertion

Answer 25

orbicularis oris

Question 26

platysma action

Answer 26

tenses skin of neck and depresses mandible

Question 27

platysma origin

Answer 27

fascia of chest

Question 28

platysma insertion

Answer 28

lower margin of mandible, skin and muscle at corner of mouth

Question 29

orbicularis oculi action

Answer 29

closes eye, produces blinking and squinting, draws eyebrows inferiorly

Question 30

orbicularis oculi origin

Answer 30

frontal and maxillary bones, ligaments around orbit

Question 31

orbicularis oculi insertion

Answer 31

tissue of eyelid

Question 32

orbucilaris oris action

Answer 32

closes lips, purses and protrudes lips

Question 33

orbicularis oris origin

Answer 33

maxilla and mandible

Question 34

orbicularis oris insertion

Answer 34

skin and muscle at the angles of the mouth

Question 35

levator labii superioris action

Answer 35

opens lips, raises and furrows upper lip

Question 36

levator labii superioris origin

Answer 36

zygomatic bone and infraorbital margin of the maxilla

Question 37

levator labii superioris insertion

Answer 37

skin and muscle of upper lip

Question 38

depressor labii inferioris action

Answer 38

draws lips inferiorly

Question 39

depressor labii inferioris origin

Answer 39

body of mandible lateral to its midline

Question 40

depressor labii inferioris insertion

Answer 40

skin and muscle of lower lip

Question 41

sternocleidomastoid action

Answer 41

flexes and laterally rotates head, neck flexion

Question 42

sternocleidomastoid origin

Answer 42

manubrium of sternum and medial portion of clavicle

Question 43

sternocleidomastoid insertion

Answer 43

mastoid process of temporal bone, superior nuchal line of occipital bone

Question 44

scalenes action

Answer 44

elevation of ribs 1&2, lateral flexion and rotation of neck

Question 45

scalenes origin

Answer 45

transverse processes of C3-7 vertebrae

Question 46

scalenes insertion

Answer 46

ribs 1-2

Question 47

serratus anterior action

Answer 47

abduction, medial rotation of and stabilization of scapula by holding it against thoracic wall

Question 48

serratus anterior origin

Answer 48

ribs 1-8

Question 49

serratus anterior insertion

Answer 49

medial border of the scapula