Face and Parotid Region Flashcards Preview

S1 Anatomy > Face and Parotid Region > Flashcards

Flashcards in Face and Parotid Region Deck (36):
1

where do muscles of facial expression insert?

skin
fascia underlying the skin

2

how are the muscles of facial expression innervated

branches of the facial nerve (CN VII)

3

what are the muscles of facial expression?

platysma
orbicularis oris
buccinator
orbicularis oculi
nasalis muscle
frontalis muscle

4

platysma
-what is its innervation (specific)

facial nerve
-cervical branch
-mandibular branch

5

orbicularis oris
-function
-innervation

function
-sphincter muscle surrounding mouth
innervation
-facial nerve
--buccal branch
--mandibular branch

6

what other muscles effect movement around the mouth
-function of each

zygomaticus major
-smile muscle
zygomaticus minor
-sneer muscle, along with levators
mentalis
-"Kirk Douglas" muscle (prominent dimple in middle of chin)
risorius
-grin muscle

7

buccinator
-function
-innervation

necessary for firmness on the lateral side of oral cavity
innervation
-facial
--buccal branch

8

orbicularis oculi
-what are the parts?
-overall innervation

parts
-orbital part
-palbebral part
-lacrimal part
innervation
-facial nerve
--zygomatic branch
--temporal branch

9

orbicularis oculi orbital part
-functioin

sphincter

10

orbicularis oculi palebral part
-function

eyelid

11

orbicularis oculi lacrimal part
-function

medial extension of eyelid over lacrimal puncta, necessary for bathing eye with tears

12

nasalis muscle
-parts
-origin and insertion
-innervation

parts
-compressor part
-dilator part
origin
-maxilla
-insertion
-near alar cartilage of the nose
innervation
-facial nerve
--zygomatic branch

13

frontalis muscle
-continuous with ____ muscle on the posterior part of the skull as _____
-these 2 muscles are connected by...
-innervation of each muscle

continuous with occipitalis as occipitofrontalis
connected by epicranial aponeurosis
frontalis innervation
-facial nerve, temporal branh
occipitalis
-facial nerve, posterior auricular branch

14

trigeminal nerve
-sensory component for...
-divisions
-nerves have names specific to...
-which division has a motor component

sensory component for all sensation over face, including proprioception of muscles of facial expression
3 divisions
-V1 (ophthalmic)
-V2 (maxillary)
-V3 (mandibular)
nerves have names specific to the regions they innervate
V3 is only division with motor component

15

trigeminal nerve
-how does each branch leave the middle cranial fossa?
-where do they emerge

leave middle cranial fossa via
-superior orbital fissure (V1)
-foramen rotundum (V2)
-foramen ovale (V3)
emerge through a number of different opening son outside of skull

16

branches of V1 of trigeminal nerve

supraorbital
supratrochlear
infratrochlear
external nasal
lacrimal

17

branches of V2 of trigeminal nerve

infraorbital
zygomaticofacial
zygomaticotemporal
superior alveolar

18

branches of V3 of trigeminal nerve

auriculotemporal
buccal
mental
inferior alveolar
lingual

19

buccal nerve of trigeminal nerve
-function

sensory only
does not innervate buccinator muscle (innervated by buccal branch of facial nerve)

20

trigeminal nerve V3 motor component
-innervates...

muscles of mastication
-temporalis
-masseter
-medial pterygoid
-lateral pterygoid
-2 other smaller suprahyoid muscles

21

facian nerve
-function
-location

innervates all muscles of facial expression
location
-emerges from base of skull through stylomastoid foramen
-branches after it passes through parotid gland

22

facial nerve branches
-which one turns posteriorly and what does it innervate

cervical
mandibular
buccal
zygomatic
temporal
posterior auricular
-turns posteriorly to innervate occipitalis muscle

23

arteries of face
-branches of...
-branch off into... (in ascending order)

branches of external carotid
branches
-superior thyroid (neck)
-ascending pharyngeal (neck)
-lingual
-facial
-occipital (saw in suboccipital triangle)
-posterior auricular
-superficial temporal
-maxillary (final branch)

24

maxillary artery of face
-seen where
-branches

seen in infratemporal fossa
branches
-middle meningeal (foramen spinosum)
-inferior alveolar
-infraorbital

25

veins of the face
-how much do they intermesh?
-names

highly anastomotic venous plexus
names
-facial vein
-retromandibular vein
-external jugular vein

26

facial vein
-drains into

drains into internal jugular vein draining the majority of the face

27

retromandibular vein
-drains into

external jugular vein
facial vein

28

veins around the nose are continuous with...
-these drain into
-source of infections to...

continuous with veins in orbit
drain into cranial cavity
source of infection to meninges and brain

29

parotid gland
-location
-encased in...
-histological compsition
--potential consequence

location
-lies in the parotid bed wedged between the ear and posterior edge of the ramus of the mandible
encased in parotid sheath
all glands are epithelial and highly mitotic
-can lead to tumors in this gland that impinge the facial nerve

30

parotid duct
-location
-empties into

location
-below zygomatic arch
empties into oral cavity adjacent to upper second molar

31

parotid gland
-what nerve travels through it (without innervating)
-how can this nerve be damaged

facial nerve
surgery of the parotid gland can result in damage to the facial nerve

32

parotid gland
-innervated by...
-type of innervation

innervated by glossopharyngeal (CN IX)
autonomic innervation

33

parotid gland parasympathetic innervation
-what is responsible for this innervation
-produces

CN IX (glossopharyngeal)
produces watery saliva

34

parotid gland sympathetic activation
-what is responsible for this innervation
-produces

carotid plexus
produces thick saliva

35

auriculotemporal nerve
-part of which nerve
-location in relation to parotid gland
-function

part of V3 of trigeminal
lies deep to parotid gland
function
-carries glossopharyngeal innervation to parotid gland
-doesn't carry sensory fibers into gland

36

clinical correlations to the face and parotid region

Bell's palsy
trigeminal neuralgia
Herpes zoster (shingles)
cancer of the parotid gland