Hearing Loss

Question 1

dense fibrous middle layer of the tympanic membrane

Answer 1

pars tensa

Question 2

small area above the lateral process and malleolar ligaments, week fibrous layer

Answer 2

pars placcida (shrapnell’s membrane)

Question 3

performation of TM or damage to ossicles causes

Answer 3

conductive hearing loss

Question 4

what is the primary goal of CHL

Answer 4

creation of a large mobile TM

Question 5

what is the secondary goal of cHL

Answer 5

creation of a strut to transmit sound from TM to the footplate of the stapes

Question 6

scala media contains

Answer 6

endolymph (intracellualr fluid composition)

Question 7

scale vestibuli and scala tympani contain

Answer 7

perilymph (extracellular fluid)

Question 8

Organ of Corti

Answer 8

scala media responsible for transduction of sound from mechanical to electric (neuronal) energy

Question 9

high frequency sounds are

Answer 9

at the base of cochlea

Question 10

low frequncy sounds are at

Answer 10

apex of the cochlea

Question 11

utricle and saccule responsible for

Answer 11

gravity detectors responsible for body posiiton

Question 12

3 semicircular canals responsible for

Answer 12

sensation of angular acceleration

Question 13

conductive hearing loss

Answer 13

caused by any interference of sound conduction through the external or middle ear

Question 14

sensorineural hearing loss

Answer 14

caused by abnormalities involving the cochlea or auditory nerve

Question 15

what is the most common hearing loss in children

Answer 15

conductive hearing loss

Question 16

audiogram

Answer 16

graphic representation of one’s sensitivity for pure tones as a function of frequency

Question 17

screeening audiometer

Answer 17

limited number of frequencies, limited number of intensities, one earphone, no bone oscillator, and often used at schools and family physician offices for screening

Question 18

diagnostic audiometer

Answer 18

multiple frequencies, intensity range, bone oscillator, 2 earphones, masking and voice imputs

Question 19

pure tone average

Answer 19

500, 1000, and 2,000

Question 20

speech reception threshold

Answer 20

the weakest level at which one can understand conversational speech

Question 21

speech discrimination test

Answer 21

score of word understanding at 40dB above SRT

Question 22

poor speech discrimination indicates

Answer 22

retrocochlear lesion or poor hearing aid candidate

Question 23

unsloping sensineural loss

Answer 23

seen early in meniere’s disease

Question 24

unsloping SNHL characteristics

Answer 24

pure tone hearing is worse in low frequency and improves towards higher frequenceis

Question 25

aged related hearing loss

Answer 25

presbycusis (dowslowing SNHL)

Question 26

pure tone hearing progressively worse in higher frequencies

Answer 26

presbycusis

Question 27

noise induced SNHL

Answer 27

maximalhearing loss at 4,000

Question 28

acoustic impedance related to middle ear function, eustachian tube function and acoustic reflexes

Answer 28

tympanometry

Question 29

flaccid TM shows up on tympanometry as

Answer 29

notch

Question 30

electrocochleography

Answer 30

potential from the 8th cranial nerve

Question 31

used for hearing test on patients unable or unwilling to cooperate

Answer 31

auditory brainstem response

Question 32

what is auditory brainstem response used for

Answer 32

rules out retrochochlear lesions

Question 33

bone anchored hearing aid is usefulf or what type of pts

Answer 33

conductive heraing loos who cannot use hearing aides due to atresia or chronic infections, patients with unilateal total SNHL

Question 34

chochlear implant used for

Answer 34

children as young as 6 months old and adults