Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
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 |