Superficial Face and Muscles of Facial Expression

Question 1

what is the skin over the mandible supplied by

Answer 1

the cervical plexus and great auricular nerve (c2 and C3)

Question 2

where does CN VII enter the skull

Answer 2

via the internal acoustic meatus

Question 3

where does CN VII exit the skull

Answer 3

the stylomastoid foramen

Question 4

what pharyngeal arch are the facial nerve and facial muscles derived from

Answer 4

second pharyngeal arch

Question 5

what are the 5 terminal branches of the facial nerve

Answer 5

temporal
zygomatic
buccal
marginal mandibular
cervical

Question 6

what is technically the sixth branch of the facial nerve that arises

Answer 6

posterior auricular

Question 7

origin and insertion of the frontal belly of occipitofrontalis

Answer 7

O = epicranial aponeurosis
I = skin/ subcutaneous tissue of eyebrows and forehead

Question 8

what is the origin and insertion of the occipital belly of the occipitofrontalis

Answer 8

O = lateral 2/3rds of superior nuchal line
I = epicranial aponeurosis

Question 9

action of the occipitofrontalis

Answer 9

wrinkles the forehead, retracts the scalp and elevates the eyebrows

Question 10

what are the two parts of the orbicularis occuli

Answer 10

orbital part
palpebral part

Question 11

origin and insertion of orbicularis occuli

Answer 11

O = nasal part of the frontal bone
I = skin around margin of orbit

Question 12

action of orbicularis occuli

Answer 12

close eyelids gently or tightly

Question 13

origin and insertion of orbicularis oris

Answer 13

O - buccinator
I - mucous membranes of lips

Question 14

action of orbicularis oris

Answer 14

close and protrude the lips and assists in whistling

Question 15

origin and insertion of buccinator

Answer 15

O - posterior part of alveolar process of maxilla and pterygomandibular raphe
I - orbicularis oris

Question 16

action of buccinator

Answer 16

press cheeks against the molar teeth and smiling

Question 17

what structure pierces the buccinator

Answer 17

the parotid duct

Question 18

what lies superficial to the buccinator and is also pierced by the parotid duct

Answer 18

buccal fat pad

Question 19

origin and insertion of the platysma

Answer 19

O- subcutaneous tissue of infra and supraclavicular regions
I - base of mandible and merges with some facial muscles

Question 20

action of platysma

Answer 20

tense skin of inferior face/ neck and depress the mandible

Question 21

what is the action of the levator labii superioris alaeque nasi

Answer 21

flares nostrils and elevates upper lips

Question 22

what are the two parts of the nasalis

Answer 22

transverse
alar

Question 23

what is the action of the nasalis

Answer 23

wrinkles skin over the dorsum of the nose

Question 24

what are the key arterial supplies to the face

Answer 24

facial
maxillary
transverse facial (superficial temporal)

Question 25

what is the venous drainage of the face

Answer 25

transverse facial vein drains some of upper face
facial vein drains most of face

Question 26

what veins join together to create the retromandibular vein

Answer 26

superficial temporal and maxillary

Question 27

what is the danger triangle of the face

Answer 27

the veins deep to danger triangle drain to cavernous sinus - skin infections in this area may spread as intracranial infections

Question 28

where do the retromandibular and facial veins drain into

Answer 28

external jugular vein

Question 29

what are the arterial supplies from the ICA

Answer 29

zygomaticofacial
zygomaticotemporal
supraorbital
supratrochlear

they accompany the nerves