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Head and Neck > Inner ear > Flashcards

Inner ear Flashcards

1
Q

stucres within inner ear

A

cochlea
semicircular canals
vestibular nenrve, ccohlear nerve

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2
Q

what crainal nerjve is the vestibular cholare

A

crainal nerve 8

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3
Q

what fucnito fhte them middle ear helps to amplify sound

A

large surface area diffeacne with inner ear
leaver action of ossicular chain and pressure on staples footplate to pressure on malleus, help to amplify

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4
Q

what type of lymph is on the outside of the inner ear canl and what type of lymph is on the inner parter of the inner ear canal

A

outside, perilymph,
inside - endolymph

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5
Q

what memabren sepperates inenrar andmiddle ear

A

oval windo and round window

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6
Q

parts of membranous labyrint

A

sacculacle and utricle

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7
Q

what type of cell flow cations in to the ear endolpymph

A

hair ells

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8
Q

what is tonotopic arrangment

A

means that in certain parts of the ear there is different parts which are sensitive to different frequencies

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9
Q

where does the tunign fork go in the webers tests

A

in the centre of the paitnets forehad

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10
Q

what is a normal reuslt fo teh webers test

A

ear the sound equally in both hear

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11
Q

what indicates sensorineural hearing loss in webers test

A

sound is louder in normal ear and quieter in the effected ear

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12
Q

what indiactes conductie hearing loss in weiers test

A

sound is louder in effected ear and quite in non effective ear

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13
Q

what is sensorineural hearing loss

A

damage to the cells in the ear

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14
Q

where is the fork placed in the rinnes test

A

on mastoid process

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15
Q

what do you test for in rinnes test

A

difference in conducitve and air condutive hearling loss

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16
Q

what is the noraml test reuslt for rinnes test

A

air conduciton is better than bone condicotin

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17
Q

what is rinnes positive

A

when air conduciton is better than bone conductoin

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18
Q

what is an abdnormal reines test

A

when bone conduction is better than air conduction

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19
Q

what is rehines negative

A

when conducito nis better though bone than air

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20
Q

is sensorineual hearlin loss rinne positive or negative

A

postive

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21
Q

what is pure audiometry

A

when differnt frequencys are played at differnt levels and decieb and ask paitnet to click buzzer when they hear a noise, to determine what they can and cannot hear

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22
Q

what colour is used to indicate right and left ear on a hearing graph

A

red right
blue left ear

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23
Q

causes of sensorineual hearing loss

A

ototoixc mediaion
head injry
aucosiic neuroma
viral infection

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24
Q

aucuois neroma

A

cancer that devlopis on crainal nerve 8 , it is noncancerous

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25
Q

what is the air bone gap

A

differne betwen bone and air condion, should be relatively small

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26
Q

what does a large gap in airbone gap indicate

A

conductive hearing loss

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27
Q

what age is visual reinforcemnt audionmetry aimed at

A

children under 2

28
Q

what age is play audoiary aimed at

A

children 2-4

29
Q

name of hearing test for newborn childrne

A

otoacousic emmisions test

30
Q

how does the otoacousitc emmiosn test work

A

sound given off by the inner ear when the cohlea is stimulated due to the outer hair cells virbaigin, this sound can be measured with probe in ear canal

31
Q

what is tympanomety

A

detemring if tther is fludi in the middle ear canla or the ear drum is perforated

32
Q

how does tympanometyr work

A

pushes air into ear canal making ear drums move back and foth

33
Q

what is the findings in tympanomey when there is excess fluid

A

lower air pressure in hte middle ear

34
Q

how does the tympanomety show if there is things in the inner ear

A

flat curve

35
Q

what does the tympanomety show if there is suction in middle ear as a result of ethoipian tube dysfunction

A

negative pressure peak

36
Q

who is able to get bone condtive hearing loss

A

those who cannot tolerate haring aid due to shape of ear
those with significant hearing loss
those with recurant infection

37
Q

what is the fuctionf o teh colcar impaltn

A

turns hearing souds into nosie

38
Q

what plane does the utricle sense in

A

horizontal

39
Q

what plane does hte saccule sense in

A

verticle

40
Q

what are otolins

A

calcium carbonet cystls on otolithic servie kimptoatn in movement

41
Q

what do the otoliths sit on top of

A

macula ( the sensory organ)

42
Q

what is the otolith

A

calcium carbonate cyses , used for detion of movemtn and acceleation in teh sacular or uricile

43
Q

what sensory organ in contianed int eh ampllas

A

crista

44
Q

what is the vertublo ocular relex

A

companation of ming eyes and head not moving, toprent dissnes

45
Q

what moves to companeate for vesibulo occular eflex

A

crista

46
Q

what are the ampila

A

expanded area of hte semicircular canals

47
Q

what type of lymph is in teh semicuira canals

A

endolymph

48
Q

type of cel found in ampilla

A

sterocillia - detect movement

49
Q

membrane name of ampilla

A

otolithic memanrebe

50
Q

what facotrs effect balance

A

vestibylar
visual
touch

51
Q

conditiosn which effect inner ear balance

A

benighn paroxysmal posital vertigo
vestibular neuritis/ labrynthitis
meniers disease
migraine

52
Q

what is the cuase of being paroxymal positional veritgo

A

moving of otoconia, (calcium carbonate crystals in otolithic membrne

53
Q

what is the test for paroxysmal positional vertigo

A

dixhallpike manover - where painte lies on back and faces side to see if verigo happens in this posion

54
Q

treatment for beign parxymsla veritgo

A

epley manover

55
Q

what is vestibualr nurtisi signs

A

vertigo, naues and vommiting, and possibly nystagmus

56
Q

what is hearing loss a sign of along side vestibular neuritsi

A

labyrinthitis

57
Q

what is nystagmus

A

reetive involuart movemetn of eyes

58
Q

what is cuases of vestibular neutisi

A

reactivation fo latent hsv infeciton

59
Q

manangmet for vestibuarl neurtis

A

vestibular sedetives
vestibular rehabation

60
Q

what is meiniers disease clinical features

A

spontantous vertig
unilatearl hearing loss
tititus
aural fullness

61
Q

durainatio fo meiser attack

A

hours

61
Q

what is downside of intratrymapc gentamicin

A

will cuase ototoxic damge resuilig in hearing loss

61
Q

managmet fo rmeitnsers

A

betahistime
intraympaic dexamethasone
intratympanic gentamicin

62
Q

pinae

A

outer ear, cartilsge part

63
Q

how does firber lenght altera along ear

A

at start of ear, shorter fiber
at end of ear , longer fibers

64
Q

what type of molcure passes election

A

sodium channels

65
Q
A

Head and Neck (11 decks)

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