L14 - Face

Question 1

Platysma: O, I, A

Answer 1

O: SubQ of infraclavicular and supraclavicular regions

I: base of mandible, skin of cheek, lower lip, angle of mouth, orbicularis oris

A: depresses mandible; tenses skin of inferior face and neck

Question 2

Occipitofrontalis: O, I, A

Answer 2

O: anteriorly from epicranial aponeurosis; posteriorly from superior nuchal line

I: epicranial aponeurosis posteriorly and skin and subQ of eyebrows and forehead anteriorly

A: elevates eyebrows, protracts scalp

Question 3

Orbicularis oculi: O,I,A

Answer 3

O: orbital margin; palpebral ligament; lacrimal bone

I: skin around margin of orbit; tarsal plates

A: closes eyelids

Question 4

Procerus: O,I,A

Answer 4

O: facial aponeurosis; lateral nasal cartilages

I: skin between eyebrows

A: depresses medial sides of eyebrows and wrinkles skin over dorsum of nose

Question 5

Nasalis:

Answer 5

O: Frontal processes of maxillae

I: alar cartilage

A: depresses alae laterally and dilates anterior nasal aperture

Question 6

Orbicularis oris: O, I, A

Answer 6

O: medial maxilla and mandible; deep surface of skin around mouth

I: mucosa of lips

A: closes oral fissure; compresses and protrudes lips

Question 7

Levator labii superioris:

Answer 7

O: infraorbital margin

I: skin of upper lip

A: part of dilators of mouth

Question 8

Zygomaticus minor

Answer 8

O: anterior part of zygomatic bone

I: skin of upper lip

A: part of dilators of mouth

Question 9

Zygomaticus major

Answer 9

O: lateral part of zygomatic bone

I: angle of mouth

A: elevates labial commissures (corner of mouth)

Question 10

Risorius:

Answer 10

O: parotid fascia and buccal skin

I: angle of mouth

A: depresses labial commissures (corner of mouth)

Question 11

Depressor anguli Oris

Answer 11

O: anterolateral base of mandible

I: angle of mouth

A: depresses labial commissures

Question 12

depressor labii inferioris

Answer 12

O: platysma and anterolateral body of mandible

I: skin of lower lip

A: mouth dilator; depresses and evert lower lip

Question 13

arteries of the face

Answer 13

FACIAL ARTERY

• branch of external carotid artery
• winds around lower border of mandible and becomes superficial
• passes lateral to angle of mouth

Question 14

what are the branches/

Answer 14

• superior and inferior labial arteries
• lateral nasal artery
• angular artery

Question 15

another artery of the face

Answer 15

SUPERFICIAL TEMPORAL

• terminal ranch of external carotid artery
• emerges between TMJ and auricle
• enters temporal fossa
• divides into frontal and parietal branches

Question 16

another artery

Answer 16

TRANSVERSE FACIAL

• arises from superficial temporal artery
• crosses face superficial to masseter muscle
• anastomoses with facial artery

Question 17

what do the branches of the transverse facial artery supply?

Answer 17

• parotid gland
• masseter muscle
• skin of face

Question 18

sensory innervation of the face occurs via what nerve?

Answer 18

V; trigeminal nerve

Question 19

how many branches, what are they?

Answer 19

3;

• opthalamic
• maxillary
• mandibular

Question 20

what are the other sensory nerves?

Answer 20

• greater occipital
• lesser occipital
• great auricular (cervical plexus)

Question 21

what is the motor nerve of the face?

Answer 21

cranial nerve 7; facial nerve

Question 22

what muscles does it suply?

Answer 22

muscles derived from second pharyngeal arch (hyoid arch)

Question 23

what are the branches?

Answer 23

• temporal
• zygomatic
• buccal
• mandibular
• cervical