Muscles of Facial Expression

Question 1

T/F:

Muscles of facial expression originate from bone and insert into the epi-dermis

Answer 1

False
Don’t go as far into the epi-dermis
Only go into the dermis

Question 2

Which muscle of facial expression is the only muscle that isn’t paired?

Answer 2

Orbicularis

Question 3

Who am I:

Paired frontal and occipital bellies separated by a single flat fibrous sheet- epicranial aponeurosis

Answer 3

Occipitofrontalis

Question 4

What is the name of the muscle that is deep to occipitofrontalis and orbicularis oculi?

Answer 4

Corregator Succli

Question 5

What is the function of corregator succuli?

Answer 5

Frowning

Question 6

What is the function of occipitofrontalis?

Answer 6

Frowning

Question 7

What is the name of the muscle that circles the eye?

Answer 7

Obicularis oculi

Question 8

What is the function of orbicularis oculi?

Answer 8

Closes eye, squeezes, directs tear flow

Question 9

What is the name of the muscle on the actual eye lid?

Answer 9

Palpebral part of orbicularis oculi

Question 10

T/F:

Procerus muscle is an unpaired muscle with vertical fibres

Answer 10

False

Paired even though it doesn’t look like it

Question 11

Which direction are the fibres oriented in nasalis muscle?

Answer 11

Horizontally

Question 12

Where do the two heads of levator labii suprerioris aleque nasi insert?

Answer 12

One of the heads sings into alar of nostril, another head extends into upper lip
Two heads, two separate functions

Question 13

Where do the muscles of the mouth insert into? How many are there?

Answer 13

Modiolis

7 muscles

Question 14

What is modiolis and where does it extend from?

Answer 14

fibromuscular structure extending from skin to mucosa (palpable between finger and thumb)- anchoring point for muscles which move corners of mouth and adjacent structures

Question 15

List the muscles of the mouth

Answer 15

Buccinator
Levator anguli oris
Depressor anguli oris
Platysma
Orbicularis oris
Zygomaticus Major
Risorious

Question 16

T/F:

Zygomaticus minor is more lateral than Zygomaticus major

Answer 16

False

Major is more lateral than minor

Question 17

What is the role of levator anguli oris?

Answer 17

Elevates the corner of the mouth

Question 18

Which muscle is deep to both levator labbi superioris and zygomaticus minor?

Answer 18

Levator anguli oris

Question 19

Where does buccinator arise and insert?

Answer 19

Arises from the outer surface of the maxilla and mandible and pterygomandibular raphe
Inserts into modiolis

Question 20

What is the function of buccinator?

Answer 20

Draw in/position cheeks, direct food over molars

Question 21

Who am I:

Extends from body of mandible, modiolis and modiolar muscles to insert into skin over pectoralis

Answer 21

Platysma

Question 22

T/F:

The function of platysma is to raise the lips and mouth

Answer 22

False

depresses lower lip and corners mouth

Question 23

T/F:

The function of depressor anguli oris is to pull the corners of the mouth down

Answer 23

True

Question 24

Where are some of the obicularis ori fibres derived from?

Answer 24

Buccinators

Question 25

T/F:

Orbicularis ori extends from the mandible to modiolis

Answer 25

False

modiolis to modiolis

Question 26

T/F:

Rhisorus is vertical and often absent

Answer 26

False

Horizontal

Question 27

What is the function of levator labbi superioris alequae nasi?

Answer 27

Raises upper lip, dilates nostril

Question 28

T/F:

Levator labii superioris is deep and lateral the to labial head of levator labii superioris aleque nasi

Answer 28

True

Question 29

Which muscles are involved in moving the lip up?

Answer 29

Levator labii superioris aleque nasi
Levator labii superioris
Zygomaticus minor

Question 30

Which muscles move the lip down?

Answer 30

Depressor labii inferioris

Mentalis

Question 31

T/F:

Depressor labii inferioris is medial to depressor anguli oris

Answer 31

True

Question 32

T/F:

Mentalis arises on the lateral side of the chin

Answer 32

False

arises medially