Auditory

Question 1

What is Hz actually measuring

Answer 1

frequency of sound

Question 2

high frequency sound has what kind of wavelength

Answer 2

short

Question 3

low frequency sound has what kind of wavelenggth

Answer 3

long

Question 4

what is amplitude of sound wave

Answer 4

intesnity of sound

Question 5

if sound pressure is weaker than reference pressure what will the dB be

Answer 5

negative

Question 6

what is range of human hearing

Answer 6

20 Hz to 20,000 Hz

Question 7

People over 25 usually can’t hear above what

Answer 7

~17kHz

Question 8

What is the most sensitive range of hearing

Answer 8

1-4 kHz

Question 9

presbycusis

Answer 9

hearing loss in older people

Question 10

what type of hearing do people lose first

Answer 10

high frequency

Question 11

What are some things that can cause a notch in audiogram

Answer 11

explosions, gunshots

Question 12

function of pinna

Answer 12

localizing sound in vertical plane

Question 13

what is the resonant frequency of the external auditory meatus

Answer 13

3,500 Hz

Question 14

Function of ossicular system

Answer 14

provide impedance match between outer and inner ear

Question 15

impendance

Answer 15

resistance to movement

Question 16

air in outer ear has what kinda impedance

Answer 16

low

Question 17

fluid in inner ear has what kind of impedance

Answer 17

high

Question 18

what is the stapedius inenrvated by

Answer 18

CN VII

Question 19

What is the tensor tympani innervated by

Answer 19

CN V

Question 20

What is the middle ear muscle attenuation reflex

Answer 20

both muscles contrac tin response to loud noise

Question 21

HOw can bell’s palsy cause a loss of the middle ear muscle attentuation reflex

Answer 21

by deinnervating the stapedius

Question 22

What do the middle ear muscles do before vocalization

Answer 22

contract

Question 23

cochlea

Answer 23

small coiled structure containing the organ of Corti which contains auditory hair cells

Question 24

endolymph concentrations

Answer 24

high concention of K+

Question 25

where is endolymph found

Answer 25

in cochlear duct

Question 26

where is perilymph found

Answer 26

in scala vestibuli, scala tympani and surrounding the lower part of hair cells

Question 27

what is the conc of perilymph

Answer 27

high Na+ low K+

Question 28

you is potassium recycled in the cochlea duct

Answer 28

gap junctions

Question 29

stria vascularis

Answer 29

responsible for production of endolymph

Question 30

melanocytes are an important component of what

Answer 30

stria vascularis

Question 31

how is the basialr membrane near the base

Answer 31

narrow and stiff

Question 32

how is the basilar membrane near the apex

Answer 32

wider and floppy

Question 33

where are high frequencies in the cochlea

Answer 33

near base

Question 34

where are low frequencies in cochlea

Answer 34

near apex

Question 35

binaural interactions

Answer 35

help with sound localization

Question 36

what is conductive deafness due to

Answer 36

impaired sound transmission in the external or middle ear

Question 37

What is dearness usually due to

Answer 37

loss of cochlear hair cells

Question 38

ways that hair cells can be damaged

Answer 38

ototoxic drugs | noise

Question 39

vestibular schwannoma usually causes what

Answer 39

unilateral hearing loss

Question 40

what is central hearing loss due to

Answer 40

lesions to central auditory nuclei and pathways

Question 41

hyperacusis

Answer 41

painful sensitivity to loud sounds

Question 42

what does spinal ganglion contain

Answer 42

cell bodies

Question 43

what do outer hair cells help with

Answer 43

more and better frequency discrimination

Question 44

what is unique about outer hair cells

Answer 44

they can change in length in response to efferent stimulation and sharpen frequency-resolving power of the cochlea

Question 45

what type of patients don't usually have otoacoustic emissions

Answer 45

sensory hearing losses of greater than 30 dB

Question 46

where does the sound lateralize in conductive hearing loss

Answer 46

bad ear

Question 47

where does sound lateralize in neurosensory hearing loss

Answer 47

good ear