face, scalp, parotid Flashcards

(54 cards)

1
Q

scalp

A

skin and CT covering neurocranium

extending from supraorbital margins of frontal to superior nuchal line of occipital bone

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2
Q

layers of scalp

A
S- skin
C- CT dense contains vessels and nn
A- aponeurosis epicranius 
L- loose CT- allows free mvmt of scalp this is normally the plane of cleavage for injury
P- pericranium (periosteum)
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3
Q

spinal nn of scalp

A

greater occipital n (C2 ramus)
C3 (dorsal ramus)
lesser occipital n
great auricular n

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4
Q

CN of scalp

A

auriculotemporal br of V3
zygomaticotemporal br of V2
supraorbital br of V1
supratrochlear br of V1

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5
Q

arterial supply of scalp from external carotid

A

occipital a
posterior auricular a
superficial temporal a

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6
Q

arterial supply of scalp from internal carotid

A

supraorbital a

supratrochlear a

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7
Q

orbicularis oculi

A

orbital part- surrounds orbit and forcefully closes eye
palpebral part- w/in eyelid gently closes eye
lacrimal part- w/in medial corner of eye, assists w/lacrimal drainage

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8
Q

corrugator supercilli

A

draws eyebrows down and in

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9
Q

occipitofrontalis

A

frontal and occipital bellies attached by epicranial aponeurosis
frontal bellies- elevates eyebrows, wrinkles skin of forehead
occipital belly- retracts scalp, assists frontal belly in surprised expression

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10
Q

orbicularis oris

A

closes lips/mouth

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11
Q

buccinator

A

keeps cheeks in contact w/gums so that food does not accumulate in vestibule of mouth

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12
Q

levator labii superioris

A

elevates upper lip

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13
Q

levator anguil oris

A

elevates upper lip, widens mouth

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14
Q

zygomaticus major

A

elevates upper lip, main smile m

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15
Q

zygomaticus minor

A

elevates upper lip

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16
Q

risorius

A

stretches lips laterally, wide smile

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17
Q

levator

A

stretches lips laterally, wide smile

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18
Q

levator labii superioris aleque nasi

A

elevates upper lip, flares nostrils

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19
Q

depressor anguli oris

A

depresses lower lip, frown

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20
Q

depressor labii inferioris

A

depresses lower lip, frown, pout

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21
Q

mentalis

A

protudes lower lip

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22
Q

procerus

A

wrinkles skin over dorsum of nose

23
Q

nasalis

A

flares nostrils

24
Q

platysma

A

depresses mandible, tenses skin of lower face and neck

25
facial nerve
SVE, component provides innervation to all mm of facial expression
26
course of facial
exits brainstem enters internal accoustic meatus courses laterally btwn cochlea, semicircular canals after which it makes a bend posteriorly and inferiorly to then course along the post wall of middle ear exits canal via stylomastoid formen
27
br of facial n
posterior auricular n diagastric stylohyoid temporofacial trunk (temporal br, zygomatic br, buccal brr) cervicofacial trunk (buccal brr, marginal mandibular brr, cervical brr)
28
V1
supplies embryonic frontonasal prominence | provides skin of forehead, upper eyelid, nose
29
V2
supplies embryonic maxillary prominence | provides skin of temporal region, upper cheek and lip, lower eye lid, ala of nose
30
brr of V1
``` brr: supratrochlear n supraorbital n infratrochlear n external nasal n ```
31
brr of V2
zygomaticotemporal zygomaticofacial infraorbital
32
V3
provides embryonic mandibular prominence | provides skin of lower cheek, lower lip, and chin
33
Brr of V3
auriculotemporal buccal mental
34
great auricular n
C2,3 | provides skin over angle of mandible
35
trigmeninal neuralgia
sensory disorder of V, sudden excruciating facial pain, can become so severe that patients can become suicidal and depressed the cause is believed to be demyelinating V2>V3>V1
36
buccal nerve block
enter via oral vestibule just post to 3rd mandibular molar
37
herpes zoster infection
affects trigem ganglion usually affects V1 leading to scarring/ulceration of cornea
38
facial a
br of external carotid w/in submandibular triangle course through submandibular gland arches over mandible just ant to masseter to enter face takes toruous course to allow for mvmt of face
39
brr of facial a
inferior labial a superior labial a lateral nasal a angular a
40
superficial temporal a
``` br of external carotid gives off transverse facial a frontal br parietal br ```
41
maxillary a
``` br of external carotid brr infraoribital buccal a mental a ```
42
ophalmic a
``` br of internal carotid brr supraorbital supratrochlear lacrimal medial palpebral dorsal nasal ```
43
facial v
communicates w/deeper plexuses pterygoid plexus via deep facial v cavernous sinus via ophlamic vv
44
lymp drainage
drain to submental, submandibular, and parotid nodes, to deep cervical along internal jugular
45
parotid gland
largest salivary gland | lies posterolateral over madibular ramus
46
parotid bed
``` sup- zygomatic arch medial- ramus of mandible, styloid process, and associated musculature post- external ear inf- mandible, post diagastric ant- masseter ```
47
parotid fascia
continuation of investing fasica
48
parotid duct
crosses masseter, turns around ant border of mm and pierces the buccinator m and mucosa of cheek to enter oral cavity opposite 2nd upper molar tooth infections can spread to parotid gland via duct
49
important structures embedded w/in parotid duct
facial n retromandibular n external carotid a
50
parasympathetics preganglionics to parotid
cell bodies in salivatory nucleus in brainstem travel w/IX exits at jugular foramen and give off tympanic tympanic n enters middle ear via tympanic canaliculus travels thru middle ear forms as lesser petrosal lesser petrosal n enters thru hiatus for lesser petrosal and exits thru foramen ovale synapses in otic ganglion
51
parasympathetics postganglionics to parotid
cell bodies in otic ganglion travel w/ auriculotemporal br of V3 secretomotor stimulates gland secretion
52
sympathetics
T1-4 superior cervical ganglion post fibers with external carotid n to parotid vasomotor
53
parotiditis
very painful pain carried in auriculotemporal V3 and greater auricular n pain refers to auricle, TMJ, and external acoustic meatus
54
sialolith
calcified concretion that can sometimes form in parotid, can block duct, very painful