ear

Question 1

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

Answer 1

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

Question 2

bones of lacrimal sac

Answer 2

maxilla, lacrimal bone

Question 3

bones of trigeminal ganglion

Answer 3

greater wing of sphenoid

Question 4

accomodation of lens

Answer 4

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

Question 5

what two bones make the zygomatic arch

Answer 5

zygomatic and temporal

Question 6

bone of carotid canal

Answer 6

temporal

Question 7

groove for pharyngotypanic tube is for what? made of?

Answer 7

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

Question 8

common places for piercing (inferior to superior)

Answer 8

lobule, scapha, helix

Question 9

innerv. of anterior portion of ear

Answer 9

auriculotemporal n. (V3)

Question 10

cranial nerves of cutaneous ear

Answer 10

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

Question 11

where is chorda tympani n from? end up?

Answer 11

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

Question 12

what are the two roots of trigeminal n

Answer 12

motor and sensory

Question 13

muscle in the roof of the eustacian tube

Answer 13

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

Question 14

a muscle that wraps around the pterygoid hamulus

Answer 14

tensor veli palatini. the nerve is named the same.

Question 15

general direction of lymph from ear

Answer 15

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

Question 16

blood supply to auricle

Answer 16

mainly superficial temporal from ECA

Question 17

vessels to deeper ear

Answer 17

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

Question 18

roof of the middle ear

Answer 18

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

Question 19

stapes sits?

Answer 19

oval window

Question 20

how many turns does the cochlea have

Answer 20

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

Question 21

where does the cochlea fluid turn around to come back

Answer 21

helicotrema of cochlea

Question 22

promentory of ear

Answer 22

tympanic plexus from tympanic nerve (IX)

Question 23

whats in the internal acoustic meatus

Answer 23

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

Question 24

the parts of ear you can see through the ear drum

Answer 24

umbo, handle lateral process of the malleolus, cochlear window

Question 25

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

Answer 25

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

Question 26

how could you get a perforation of eardrum

Answer 26

loud noises, Qtip, pressure

Question 27

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

Answer 27

levator veli palatini

Question 28

relationship between ICA, and IJV

Answer 28

ICA is anterior to IJV

Question 29

entrance to the mastoid air cells

Answer 29

antrum

Question 30

medial wall of the tympanic cavity has?

Answer 30

has the promentory and the canal for the facial nerve

Question 31

posterior wall of the tympanic cavity

Answer 31

mastoid wall

Question 32

___ connects the ___ to the oval window

Answer 32

annular stapedial ligament, stapes

Question 33

t/f all motor nerves related to VII are SVE

Answer 33

true

Question 34

ICA is ___ and ___ to the eustacian tube

Answer 34

at base of the skull, it is posterior, in the skull it becomes superior

Question 35

which muscles keep you from getting food in your nose?

Answer 35

levator and tensor tympanini

Question 36

t/f the cochlea is separated from the semicircular ducts

Answer 36

FALSE. they are connected via the ductus reuniens

Question 37

what duct connects ear to the arachnoid space

Answer 37

cochlear aqueduct

Question 38

if you are seasick (slow motion) what area of the ear is responsible?

Answer 38

the saccule and utricle. superior, inferior branches of vestibulocochlear nerve

Question 39

what are the three parts of the cochlear duct

Answer 39

scala vestibuli, cochlear duct, scala tympani

Question 40

where is the basilar membrane?

Answer 40

between the scala tympani and the cochlear duct (which has the tectorial membrane)

Question 41

what produces endolymph

Answer 41

vascular stria

Question 42

where do the nerves emerge in the cochlea? what are the ganglia in there?

Answer 42

bony medioleus, spiral ganglion

Question 43

where is reissner’s membrane

Answer 43

between scala vestibuli and cochlear duct

Question 44

how many limbs of the semicircular canal? ampulla?

Answer 44

5 limbs, 3 ampulla

Question 45

hearing loss due to?

Answer 45

loss of hair cells (from drugs, loud noises, getting old)

Question 46

besides the cochlea, where else could you find hair cells?

Answer 46

[ampulla, for spinning]; [utricle, saccule; for tilt]

Question 47

blood supply to deeeeeep (inner) ear

Answer 47

labyrinthe artery from anterior inferior cerebellar artery