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Flashcards in ear Deck (47)
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1

what functional deficit would you have if you damaged the deep petrosal nerve?

its mostly vasomotor except for dilation of pupil. it'll affect secretions of nose, palate

2

bones of lacrimal sac

maxilla, lacrimal bone

3

bones of trigeminal ganglion

greater wing of sphenoid

4

accomodation of lens

psym @ brainstem > synapse @ ciliary g. > short ciliary n > choroid > constrict ciliary m. > relaxes zonular fibers

5

what two bones make the zygomatic arch

zygomatic and temporal

6

bone of carotid canal

temporal

7

groove for pharyngotypanic tube is for what? made of?

for eustacian tube. part is cartilagenous, part is bony. its between sphenoid and temporal

8

common places for piercing (inferior to superior)

lobule, scapha, helix

9

innerv. of anterior portion of ear

auriculotemporal n. (V3)

10

cranial nerves of cutaneous ear

V, VII, IX, X (also cervical plexus)

11

where is chorda tympani n from? end up?

from VII, through tympanic cavity, joins with lingual nerve (V3)

12

what are the two roots of trigeminal n

motor and sensory

13

muscle in the roof of the eustacian tube

tensor tympani; attaches to malleous, and helps to dampen vibrations; think trigeminal.

14

a muscle that wraps around the pterygoid hamulus

tensor veli palatini. the nerve is named the same.

15

general direction of lymph from ear

antioriorly to parotid or posteriorly to mastoid nodes, then down to deep cervical nodes

16

blood supply to auricle

mainly superficial temporal from ECA

17

vessels to deeper ear

deep auricular, anterior tympanic branches from maxillary (from ECA)

18

roof of the middle ear

epitympanic recess made by tegman tympani where the malleus and incus articulate

19

stapes sits?

oval window

20

how many turns does the cochlea have

two and a half IN, then two and a half back OUT

21

where does the cochlea fluid turn around to come back

helicotrema of cochlea

22

promentory of ear

tympanic plexus from tympanic nerve (IX)

23

whats in the internal acoustic meatus

F,I,C,IV,SV (facial, intermedius, cochlear, inverior vestibular, superior vestibular)

24

the parts of ear you can see through the ear drum

umbo, handle lateral process of the malleolus, cochlear window

25

name something you don't want in your ear, and what you'd do before you take it out

maggots, ear ticks, ear ants; anesthetize it or kill it so it doesn't scrape on the way out

26

how could you get a perforation of eardrum

loud noises, Qtip, pressure

27

what muscle related to the eustacian tube is innervated by CN X

levator veli palatini

28

relationship between ICA, and IJV

ICA is anterior to IJV

29

entrance to the mastoid air cells

antrum

30

medial wall of the tympanic cavity has?

has the promentory and the canal for the facial nerve