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Audiology > Test 1 > Flashcards

Test 1 Flashcards

1
Q

prevalence of those with hearing loss

A

35 million

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2
Q

number over a period of time

A

incidence

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3
Q

number is

A

prevalence

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4
Q

prevalence rate is

A

incidence

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5
Q

collects sounds and directs into aud. system

A

pinna

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6
Q

little areas on pinna that hold air

A

concha

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7
Q

shape of ext. ear canal

A

s shaped

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8
Q

where ext. ear canal narrows

A

isthmus

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9
Q

opening to ear canal

A

ext. auditory meatus

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10
Q

where ear canal ends

A

tympanic membrane

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11
Q

first ____ of ear canal is cartilagenous

A

2/3

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12
Q

last ____ of ear canal is bony

A

1/3

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13
Q

right under isthmus of ear canal

A

TMJ

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14
Q

cone of light is

A

reflection you get off of ear drum

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15
Q

2 distinctions of ear drum

A

pars flaccida

pars tensa

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16
Q

layers of pars tensa

A

outer (continuous with skin)
fibrous layers
mucous layer

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17
Q

layer of pars tensa that lines entire ME

A

mucous layer

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18
Q

outer edge of ear drum

A

annulus

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19
Q

middle of ear drum

A

umbo

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20
Q

middle ear space

A

tympanum

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21
Q

tympanum filled with

A

air

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22
Q

function of middle ear

A
  • conduct sound into IE

- boosts sound waves to overcome impedance mismatch

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23
Q

Eustachian tube opens up into

A

nasopharynx

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24
Q

what happens when Eustachian tube opens

A

the air pressure in ME will equal air pressure outside of ear

25
Q

Eustachian tube is normall open/close?

A

closed

26
Q

Eustachian tube lined with

A

mucosa

27
Q

where is CN VII located

A

medial wall of tympanum

28
Q

portals between ME and IE

A

oval and round window

29
Q

landmark of posterior wall of tympanum

A

mastoid bone

30
Q

why does mastoid bone have caves and channels

A

lightens load of the head

31
Q

superior wall of tympanum

A

epitympanic recess

32
Q

pulls malleolus inward

A

tensor tympani

33
Q

pulls stapes out

A

stapedial muscle

34
Q

pulls tympanic membrane in

A

tensor tympani

35
Q

acoustic reflex

A

tensor tympani and stapedial muscle ctx together in response to a sound

36
Q

purpose of acoustic reflex

A

way of protecting ME

37
Q

incus bulges into

A

bulge of epitympanic membrane

38
Q

what overcomes imp. mismatch

A

ossicular chain

39
Q

what does acoustic reflex do

A

reduces amplitude of loud sounds to protect ME

40
Q

behind oval window

A

vestibule

41
Q

perilymph is a

A

shock absorber

42
Q

endolymph

A

houses metabolites (blood, Na, K, etc)

43
Q

inner ear is a

A

labyrinth

44
Q

3 sections of IE

A
  • cochlea
  • semicircular canal
  • vestibule
45
Q

cochlea function

A

hearing

46
Q

semi cir canal function

A

balance

47
Q

vestibule function

A

sensation of movement

48
Q

neuroepithelium takes form of

A

hair cells

49
Q

how sound wave travels through cochlea is

A

tonotopic organization

50
Q

how wave moves through cochlea

A

oval window –> perilymph –> base to apex –> travels to portion responsible for that freq

51
Q

base is ____ freq

A

high

52
Q

apex is ___ freq

A

low

53
Q

changes in energy through ear

A

acoustic –> mechanical –> hydraulic –> neuroelectric

54
Q

where nerve is channeled when it comes out of cochlea

A

internal auditory canal

55
Q

contains organ of corti

A

scala media

56
Q

First stage of aud development

A

auditory detection

57
Q

Second stage of aud development

A

auditory discrimination

58
Q

Third stage of aud development

A

auditory identification

59
Q

Fourth stage of aud development

A

auditory comprehension

Audiology (1 decks)

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