4.2 The Face

Question 1

Attachments for muscles of facial expression are

Answer 1

Between the skull and overlying skin

Question 2

All muscles of facial expression are innervates by

Answer 2

Facial nerve CN7

Question 3

When a muscle of facial expression contracts

Answer 3

The skin moves (rather than a joint)

Question 4

Motor branches of facial nerve

Answer 4

Temporal 
Posterior auricular 
Zygomatic 
Buccal 
Cervical 
Marginal mandibular

Question 5

What is the action of occipitofrontalis

Answer 5

Elevates eyebrows and skin of forehead (as in a surprised or doubtful look)

Question 6

What is the function of procerus

Answer 6

Depresses skin between eyebrows (as in a look of anger)

Question 7

Action of orbicularis Oculi

Answer 7

Closes eyelids
Palpebral-gentle
Orbital-tight

Question 8

Function of orbicularis oris

Answer 8

Compress and protrudes the lips (as in puckering/tightly closing lips)

Question 9

What is the function of the buccinator

Answer 9

Presses check against molar teeth (keeps cheek taut when blowing)

Question 10

Zygomaticus major function

Answer 10

Pulls superiority on upper lip (as in smiling)

Question 11

Function of risorius

Answer 11

Pulls corners of mouth posteriorly (as in an insincere smile)

Question 12

Function of levator labii superioris

Answer 12

Elevates lips, dilates nostrils, and raises angle of the mouth

Question 13

Function of depressor labii inferioris

Answer 13

Pulls lower lip inferiorly (to show lower teeth)

Question 14

Function of depressor anguli oris

Answer 14

Pulls corners of mouth inferiorly (as in frown)

Question 15

Function of mentalis

Answer 15

Elevates and protrudes lower lip (as in a pout)

Question 16

Function of platysma

Answer 16

Tenses skin of lower face and neck (as in a grimace)

Question 17

Compression of facial nerve due to swelling

Answer 17

Bell’s palsy

Question 18

Cause of Bell’s palsy

Answer 18

Cause unknown, perhaps viral infection

Question 19

How long does it take most people to recover from Bell’s palsy

Answer 19

2-8 weeks, some may take 1-2 years to recover

Question 20

What are the affects of Bell’s palsy

Answer 20

Inability to raise eyebrow
Difficulty closing eye
Drooping in corner of mouth

Question 21

Largest salivary gland

Answer 21

Parotid duct

Question 22

What nerve is embedded within the parotid gland without innervating it

Answer 22

facial nerve

Question 23

What nerve innervates the parotid gland

Answer 23

Glossopharyngeal CN9

Question 24

The parotid duct crosses surface of the massager then pierced through buccinator to

Answer 24

Drain saliva into mouth near second upper molar

Question 25

Facial wounds bleed freely and heal quickly because of

Answer 25

Numerous anastomoses