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15 Cards in this Set

  • Front
  • Back
3 types of hearing loss
1. conductive
2. sensory
3. neural
4 mechanisms of conductive hearing loss
1. obstruction (e.g., cerumen impaction)
2. mass loading (e.g., middle ear effusion)
3. stiffness effect (e.g., otosclerosis)
4. discontinuity (e.g., ossicular disruption)
conductive hearing loss results from
a. inner ear
b. middle ear
c. external ear
b and c, middle and external ear
causes of most cases of adult conductive hearing loss
- cerumen impaction or - transient auditory tube dysfunction associated with upper respiratory tract infection
causes of persistent conductive hearing loss
chronic ear infection, trauma, or otosclerosis
is conductive hearing loss generally correctable
yes, medically and/or surgically
Sensory hearing loss results from ____ ?
deterioration of the cochlea, usually due to loss of hair cells from the organ of Corti
What is prebyacusis?
gradually progressive, predominantly high-frequency [sensory]loss with advancing age
Other than presbyacusis, what are common causes of sensory hearing loss
head trauma, excessive noise exposure, and systemic diseases such as diabetes mellitus
Is sensory hearing loss generally correctable?
No, but it may be prevented or stabilized.
Neural hearing loss stems from lesions of what 4 structures?
1. 8th nerve
2. auditory nuclei
3. ascending tracts
4. auditory cortex
What are some common causes of neural hearing loss?
- acoustic neuroma
- multiple sclerosis
- cerebrovascular disease
What simple instrument is used to test audiology?
512 Hz tuning fork
What is the Weber test?
tuning fork is placed on the forehead or front teeth -

- conductive loss: sound appears louder in the poorer-hearing ear

- sensorineural loss: sound radiates to the better side
What is the Rinne test?
tuning fork is placed alternately on the mastoid bone and in front of the ear canal -

-conductive loss: bone conduction exceeds air conduction

- sensorineural loss: air conduction exceeds bone conduction