Superficial Face and Muscles of Facial Expression

Question 1

sensory innervation of the face supplied by

Answer 1

CN V - front of face
C2 / C3 cervical nerves - scalp and skin of posterior head

Question 2

sensory innervation from CN V1

Answer 2

supraorbital
supratrochlear
infratrochlear
external nasal
lacrimal

Question 3

sensory innervation from CN V2

Answer 3

zygomaticotemporal
zygomaticofacial
infraorbital

Question 4

sensory innervation from CN V3

Answer 4

auriculotemporal
buccal
mental

Question 5

sensory innervation from C2

Answer 5

greater occipital

Question 6

sensory innervation from C3

Answer 6

third occipital

Question 7

sensory innervation from C2 and C3

Answer 7

great auricular
lesser occipital

Question 8

motor innervation of face

Answer 8

CN VII via muscles of facial expression

Question 9

5 muscles of facial expression

Answer 9

1. buccinator
2. orbicularis oris
3. orbicularis oculi
4. occipitofrontalis
5. platysma

Question 10

where does CN VII enter the skull

Answer 10

internal acoustic meatus

Question 11

where does CN VII exit the skull

Answer 11

stylomastoid foramen

Question 12

2 branches given off from CN VII when it exits skull

Answer 12

1. posterior auricular
2. digastric - to posterior belly of digastric and stylohyoid

Question 13

facial nerve forms a large plexus where

Answer 13

in the parotid gland

Question 14

5 branches of parotid plexus

Answer 14

1. temporal
2. zygomatic
3. buccal
4. marginal mandibular
5. cervical

Question 15

temporal branch goes to

Answer 15

frontal belly of occipitofrontalis and orbicularis oculi

Question 16

zygomatic branch goes to

Answer 16

runs along zygomatic arch and bone to orbicularis oculi and upper lip muscles

Question 17

buccal branch goes to

Answer 17

buccinator and orbicularis oris

Question 18

marginal mandibular branch goes to

Answer 18

orbicularis oris as well as lower lip and chin

Question 19

cervical branch goes to

Answer 19

platysma

Question 20

epicranius

Answer 20

contrains frontal and occipital bellies of occipitofrontalis as well as their shared tendon; epicranial aponeurosis which forms 3rd layer of the scalp

Question 21

frontal belly of occipitofrontalis origin and insertion

Answer 21

origin - epicranial aponeurosis
insertion - subcutaneous tissues of eyebrows and forehead

Question 22

occipital belly of occipitofrontalis origin and insertion

Answer 22

origin - lateral 2/3 of superior nuchal line
insertion - epicranial aponeurosis

Question 23

orbicularis oculi is formed of 2 parts

Answer 23

1. palpebral part
2. orbital part

Question 24

action of orbicularis oculi

Answer 24

involuntary (blinking) - palpebral part
voluntary (tightly) - orbital part

Question 25

origin and insertion of buccinator

Answer 25

origin - posterior part of alveolar process of maxilla / mandible & pterygomandibular raphe
insertion - fibres merge with orbicularis oris

Question 26

buccal fat pad

Answer 26

lies superficially to the buccinator and is pierced by the parotid duct

Question 27

parotid duct is superficial to what muscle

Answer 27

the masseter

Question 28

where does parotid duct enter the oral cavity

Answer 28

near the upper 2nd molar

Question 29

origin and insertion of platysma

Answer 29

origin - subcutaneous tissue of infra and supraclavicular regions
insertion - base of mandible

Question 30

majority of blood supply to the face is from

Answer 30

ECA and some from ICA

Question 31

ECA branches that supply face

Answer 31

facial
buccal / mental / infraorbital - branches of maxillary
transverse facial - branch of superficial temporal

Question 32

ICA branches that supply face

Answer 32

branch of ophthalmic - zygomaticofacial / zygomaticotemporal / supraorbital / supratrochlear

Question 33

what is the connection between arteries and veins in the face

Answer 33

arteries of the face often run alongside veins of the same name (and sometimes nerves)

Question 34

veins of the face drain to

Answer 34

IJV directly or indirectly

Question 35

at medial angle of eye, the facial vein communicates with

Answer 35

superior ophthalmic vein which drains into cavernous sinus

Question 36

retromandibular vein formed by joining of

Answer 36

superficial temporal vein & maxillary vein

Question 37

where does retromandibular vein run

Answer 37

runs within the parotid gland, superficial to ECA and deep to facial nerve then posterior to the mandible after exiting the parotid gland

Question 38

2 branches of retromandibular vein

Answer 38

1. anterior branch - unites with facial vein
2. posterior branch - unites with posterior auricular to drain to EJV

Question 39

EJV drains to

Answer 39

subclavian vein