Exam 2 Flashcards

1
Q

Prebycusis

A

Deterioration of hearing due to old age

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2
Q

What is the cause of prebycusis

A

Loss of outter hair cells function

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3
Q

Tinnitus

A

Ringing in the ears

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4
Q

Menier’s Disease

A

Excessive endolymphatic fluid pressure and most misdiagnosed disorder

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5
Q

What percentage of cases are unilateral for Menier’s Disease

A

70-85% of cases

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6
Q

Ototoxicity

A

damage to the ear due to toxic effects og vstioud chemical agents

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7
Q

CRISPER

A

gene editing technology

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8
Q

syndromic

A

other medical problems in addition to hearing loss

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9
Q

non-syndromic

A

hearing loss is the only medical problem

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10
Q

what percent of children are born with severe or pround hearing loss

A

1/1000 and 2/1000

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11
Q

what percentage of prelingual hearing loss is genetic

A

50%

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12
Q

dysplasia

A

abnormal development of a structure

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13
Q

aplasia

A

lack of development

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14
Q

microtia

A

abnormally small pinna

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15
Q

anotia

A

no pinna

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16
Q

atresia

A

no ear canal

17
Q

stenosis

A

narrowing of the ear canal

18
Q

what is the incidence related to atresia

A

1 in 10,000-20,000

19
Q

what percentage of atresia is unilateral

A

> 80%

20
Q

external otitis

A

known as swimmers ear

21
Q

extostosis

A

mounds of bony growth in ear canal

22
Q

barotrauma

A

occurs due to a sudden change in pressure

23
Q

eustachian tube dysfunction

A

does not open properly or does not close properly

24
Q

cholesteatoma

A

accumulation of keratin and skin debreis in the middle ear

25
Q

otosclerosis

A

normal bone is replaced with spongy bone that grows and then hardens
- becomes stuck in place

26
Q

temporary threshold shift

A

sound expose causes temporary change in hearing sensitivity

27
Q

permanent threshold shift

A

occurs when exposure to loud sound causes a permanent decrease in hearing sensitvity

28
Q

mechanical damage

A

physical pressure from sound causes damage to the hearing system

29
Q

mechanical damage examples

A

bombs and gun shots

30
Q

metabolic damage

A

overproduction of free radicals trigger apopotsis

31
Q

what is most vulnerable to NIHL

A

outer hair cells

32
Q

mechanical damage is what dB

A

> 115

33
Q

metabilic damage is what dB

A

> 85

34
Q

free radicals

A

moleducles that have an unpaired electrone

35
Q

apoptosis

A

programmed cell death

36
Q

antioxidants

A

molecules with an extra electron

37
Q

sound dosimeter

A

industrial setting to monitor amount of noise a worker is exposed throughout the day

38
Q

De nova mutation

A

Genetic alteration that is present for the first time in one family member: child usually

39
Q

Connexin 26

A

protein blocker that is apart DNF-1 and is congenitive