Question
Damage to the part of ear as marked in the picture below results in ?
A. Sensorineural hearing loss.
B. Conductive hearing loss.
C. Mixed hearing loss.
D. None of the above.
Show Answer
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Correct Answer » A
Explanation
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Ans : A. Sensorineural Hearing loss.
The part of ear marked in the picture above represents the inner ear.
SENSORINEURAL HEARING LOSS
- Lesions of cochlea – sensory type(Cochlear deafness)
- Lesions of VIII nerve and its connections – neural type(retrocochlear deafness)
Tuning Fork Tests:
- Positive Rinne test (AC > BC)
- Weber lateralized to better ear
- Bone conduction reduced on ABC and
Audiometry tests
- More often involving high frequencies
- Audiometry: No air-bone gap
- Difficulty in hearing in the presence of noise
- Speech discrimination poor
CONDUCTIVE HEARING LOSS
- Caused by any disease process interfering with conduction of sound from the external ear to the stapedio-vestibular joint.
