Inner ear Flashcards
stucres within inner ear
cochlea
semicircular canals
vestibular nenrve, ccohlear nerve
what crainal nerjve is the vestibular cholare
crainal nerve 8
what fucnito fhte them middle ear helps to amplify sound
large surface area diffeacne with inner ear
leaver action of ossicular chain and pressure on staples footplate to pressure on malleus, help to amplify
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
outside, perilymph,
inside - endolymph
what memabren sepperates inenrar andmiddle ear
oval windo and round window
parts of membranous labyrint
sacculacle and utricle
what type of cell flow cations in to the ear endolpymph
hair ells
what is tonotopic arrangment
means that in certain parts of the ear there is different parts which are sensitive to different frequencies
where does the tunign fork go in the webers tests
in the centre of the paitnets forehad
what is a normal reuslt fo teh webers test
ear the sound equally in both hear
what indicates sensorineural hearing loss in webers test
sound is louder in normal ear and quieter in the effected ear
what indiactes conductie hearing loss in weiers test
sound is louder in effected ear and quite in non effective ear
what is sensorineural hearing loss
damage to the cells in the ear
where is the fork placed in the rinnes test
on mastoid process
what do you test for in rinnes test
difference in conducitve and air condutive hearling loss
what is the noraml test reuslt for rinnes test
air conduciton is better than bone condicotin
what is rinnes positive
when air conduciton is better than bone conductoin
what is an abdnormal reines test
when bone conduction is better than air conduction
what is rehines negative
when conducito nis better though bone than air
is sensorineual hearlin loss rinne positive or negative
postive
what is pure audiometry
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
what colour is used to indicate right and left ear on a hearing graph
red right
blue left ear
causes of sensorineual hearing loss
ototoixc mediaion
head injry
aucosiic neuroma
viral infection
aucuois neroma
cancer that devlopis on crainal nerve 8 , it is noncancerous
what is the air bone gap
differne betwen bone and air condion, should be relatively small
what does a large gap in airbone gap indicate
conductive hearing loss
what age is visual reinforcemnt audionmetry aimed at
children under 2
what age is play audoiary aimed at
children 2-4
name of hearing test for newborn childrne
otoacousic emmisions test
how does the otoacousitc emmiosn test work
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
what is tympanomety
detemring if tther is fludi in the middle ear canla or the ear drum is perforated
how does tympanometyr work
pushes air into ear canal making ear drums move back and foth
what is the findings in tympanomey when there is excess fluid
lower air pressure in hte middle ear
how does the tympanomety show if there is things in the inner ear
flat curve
what does the tympanomety show if there is suction in middle ear as a result of ethoipian tube dysfunction
negative pressure peak
who is able to get bone condtive hearing loss
those who cannot tolerate haring aid due to shape of ear
those with significant hearing loss
those with recurant infection
what is the fuctionf o teh colcar impaltn
turns hearing souds into nosie
what plane does the utricle sense in
horizontal
what plane does hte saccule sense in
verticle
what are otolins
calcium carbonet cystls on otolithic servie kimptoatn in movement
what do the otoliths sit on top of
macula ( the sensory organ)
what is the otolith
calcium carbonate cyses , used for detion of movemtn and acceleation in teh sacular or uricile
what sensory organ in contianed int eh ampllas
crista
what is the vertublo ocular relex
companation of ming eyes and head not moving, toprent dissnes
what moves to companeate for vesibulo occular eflex
crista
what are the ampila
expanded area of hte semicircular canals
what type of lymph is in teh semicuira canals
endolymph
type of cel found in ampilla
sterocillia - detect movement
membrane name of ampilla
otolithic memanrebe
what facotrs effect balance
vestibylar
visual
touch
conditiosn which effect inner ear balance
benighn paroxysmal posital vertigo
vestibular neuritis/ labrynthitis
meniers disease
migraine
what is the cuase of being paroxymal positional veritgo
moving of otoconia, (calcium carbonate crystals in otolithic membrne
what is the test for paroxysmal positional vertigo
dixhallpike manover - where painte lies on back and faces side to see if verigo happens in this posion
treatment for beign parxymsla veritgo
epley manover
what is vestibualr nurtisi signs
vertigo, naues and vommiting, and possibly nystagmus
what is hearing loss a sign of along side vestibular neuritsi
labyrinthitis
what is nystagmus
reetive involuart movemetn of eyes
what is cuases of vestibular neutisi
reactivation fo latent hsv infeciton
manangmet for vestibuarl neurtis
vestibular sedetives
vestibular rehabation
what is meiniers disease clinical features
spontantous vertig
unilatearl hearing loss
tititus
aural fullness
durainatio fo meiser attack
hours
what is downside of intratrymapc gentamicin
will cuase ototoxic damge resuilig in hearing loss
managmet fo rmeitnsers
betahistime
intraympaic dexamethasone
intratympanic gentamicin
pinae
outer ear, cartilsge part
how does firber lenght altera along ear
at start of ear, shorter fiber
at end of ear , longer fibers
what type of molcure passes election
sodium channels
