Muscles of Facial Expression

Question 1

Muscle of facial expression blood supply

Answer 1

Usually facial artery

Question 2

What cranial nerve is the facial nerve?

Answer 2

Cranial nerve 7

Question 3

Are the muscles of facial expression paired or not paired?

Answer 3

Paired

Facial expressions usually work together

Question 4

Epicranius frontal belly
Origin-
Insertion-

Answer 4

Origin-Epicracial aponeurosis

Insertion- eyebrow and root of nose

Question 5

Epicranius occipital belly
origin-
insertion-

Answer 5

Origin-Occipital and temporal bones

Insertion-epicranial aponeurosis

Question 6

Epicranius action

Answer 6

Raises eyebrows and scalp

Surprised look

Question 7

Orbicularis oculi orbital portion
Origin
Insertion

Answer 7

Origin-orbital rim

Insertion- skin lateral to eye

Question 8

Orbicularis oculi palpebral portion
Origin-
Insertion-

Answer 8

Origin-medial and lateral corners of eye

Insertion-shared with origin

Question 9

Orbicularis oculi

Action

Answer 9

Closes the eye, Squinting, eyelid, working more of orbital

Question 10

Circles the eyes

Answer 10

Orbicularis oculi

Eye optic

Question 11

Makes up our eyebrow muscles

Answer 11

Corrugator

Question 12

Corrugator supercilii
Origin
Insertion

Answer 12

Origin-frontal bone

Insertion-skin lateral to eyebrow

Question 13

Corrugator supercilii action

Answer 13

Moves skin of eyebrow medial and inferior, vertical wrinkles on forehead, lowers eyebrow.
*furrows the brow

Question 14

Procerus
Origin-
Insertion-

Answer 14

Origin- nasal bone

Insertion- skin of forehead

Question 15

Procerus action

Answer 15

Horizontal wrinkles between the eyebrows, wrinkles in between eyebrows

Question 16

Levator labii superioris alaque nasi

Action-

Answer 16

“Elevate lip upper angle nose”

Flaring of nostrils(nares), raise upper lip and angle of nose

Question 17

Lavator labii superioris alaque nasi
Origin-
Insertion-

Answer 17

Origin-frontal process of maxilla

Insertion-skin at ala of nose, upper lip

Question 18

Levator labii superioris
Origin-
Insertion-

Answer 18

Origin-infraorbital rim

Insertion-skin of upper lip

Question 19

Lavator labii superioris action

Answer 19

Elevates the upper lip

Question 20

Zymomaticus major
Origin
Insertion

Answer 20

Origin- zygomatic bone

Insertion- skin at angle of mouth, corner of mouth

Question 21

Zygomaticus major action

Answer 21

Pulls angle of mouth superiorly and laterly, pulls smile up and to side

Question 22

zygomaticus minor
Origin
Insertion

Answer 22

O:just medial to zygomaticus major
I: skin of the upper lip, just lateral to levetor labii superioris

Question 23

Zygomaticus minor action

Answer 23

Pulls angle of mouth superior (and lateral)

Smile muscle

Question 24

Levator anguli oris
O:
I:

Answer 24

O: canine fossa of maxilla
I: skin at the angle of the mouth

Question 25

Levator anguli oris | Action

Answer 25

Pulls angle of mouth superior and lateral Cranial 7 and facial nerve Deep muscle (under, behind)

Question 26

Risorius O: I:

Answer 26

O: superficial fascia of masseter I: skin at angle of mouth

Question 27

Risorius action

Answer 27

Widens the mouth, pulls smile out Cranial nerve 7, facial artery

Question 28

Buccinator | 3 origins

Answer 28

Fibrous-pterygoidansibular raphe (extends from hamulus and goes into myohyloid ridge) 2 bony- by cal alveolar bone, maxilla, and mandible (molar region)

Question 29

Buccinator insertion

Answer 29

Skin at angle of mouth

Question 30

Buccinator actions

Answer 30

Pulls angle of mouth laterally, shortens cheek vertically, shortens cheek horizontally, puffs out cheeks Ex: blow up balloons play instrument

Question 31

What muscle is an accessory muscle of mastication and helps keep food on teeth

Answer 31

Buccinator

Question 32

Orbicularis oris | O and I:

Answer 32

Skin surrounding the mouth, some insertions at philtrum and angle of mouth. Philtrum-area below nasal septum

Question 33

Orbicularis oris action

Answer 33

Closes the lips, puckers the lips *muscle around mouth

Question 34

Depressor anguli oris | Action

Answer 34

Depresses angle of mouth Ex: frowning Lower angle of mouth, bring down mouth, lower corners of mouth

Question 35

Depressor anguli oris O: I:

Answer 35

O: lower border of mandible I: skin at angle of mouth

Question 36

Depressor labii inferioris action

Answer 36

Depress lower lip, exposes lower teeth,

Question 37

Insertions go towards...

Answer 37

Origins

Question 38

Mentalis O: I:

Answer 38

O: near midline of mandible I: skin of chin

Question 39

Mentalis action

Answer 39

Elevates skin at chin which will protrude lower lip, pushes out lower lip Ex: pouting 2 small balls of muscle

Question 40

Platysma O: I:

Answer 40

O: skin superficial to clavicle/shoulder I: inferior border of mandible

Question 41

Platysma action

Answer 41

Raises skin of neck and pulls down corners of mouth, neck tightens up *very thin and superficial

Question 42

All muscles of mastication and facial muscles use what nerve

Answer 42

Cranial nerve 7