Loading....
Coupon Accepted Successfully!

ENT

Open Flashcards

Tests For Hearing

Question
37 out of 41
 

In monaural diplacusis the lesion is in the: [LQ]



A Cochlea
B Auditary nerve

C Bralnstem
D Cerebrum

Ans. A Cochlea Ref. Tu/i tst/ed p 114

Subjective feeling of diplacusis, hyperacusis or fullness in the ear occurs in cochear pathology or cohlear, sensorineural hearing loss (SNHL).

Differences between cochlear and Retrocochlear SNHL

Cochlear SNHL

Retrocochlear SNHL

a. Hair cells are damaged malnly

b. Recruitrnent is present

c. No significant tone decay

d. SISI (Short increment sensitivity index) is positive

e. Bekesy shows no gap between I and C tracing (Type II) Speech discrimination is not highly impaired (SDS is low) and roil over

phenomenon is not present

f. Subjective feeling of dipiacusis, hyperacusis or fullness in the ear

a. Lesion is ofVllth nerve or its central connections

b. Recruitment is absent

c. Tone decay is significant

d. SISI is negative

e. Bekesy shows wide gap between I and C tracings (Type III) Speech discrimination is highly impaired (SDS very poor) and roll over

phenomenon is present

f. No such sensation or feeling

SDS - Speech Discrimination Score

It is-the maximum percentage of correct score when phonetically balanced single syllable words such as pin, day, bus are useD.

Results

In normal subject or conductive hearing loss, 50S is 95-100%

In cochlear lesions 50S is low

In retrocochlear lesions, 50S is very poor and roll over phenomenon is present (which means with increase of intensity, drop of score occurs)

Tests For Hearing Flashcard List

41 flashcards
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
21)
22)
23)
24)
25)
26)
27)
28)
29)
30)
31)
32)
33)
34)
35)
36)
37)
38)
39)
40)
41)