Term
| Incidence and prevalence of hearing loss |
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Definition
10% of the population has a hearing loss
8% of births
50% of those over 65 |
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Term
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Definition
Pinna
External Auditory Meatus
Tympanic Membrane |
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Term
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Definition
Outer ear
flexible cartilage covered with skin
funnels the sound |
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Term
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Definition
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Term
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Definition
Outer ear
eardrum (boundary between outer/middle) |
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Term
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Definition
Tympanic Cavity
Eustachian Tube
Ossicular Chain (Middle Ear Bones)
-Malleus
-Incus
-Stapes |
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Term
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Definition
Middle ear
air-filled cavity |
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Term
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Definition
Middle ear
connects the middle ear with the nasopharnyx
allows for equalization of air pressure |
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Term
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Definition
(Middle Ear Bones)
Malleus
Incus
Stapes |
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Term
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Definition
Middle Ear--Ossicular Chain
attached to tympanic membrane (eardrum) |
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Term
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Definition
Middle Ear--Ossicular Chain
bone that connects the two |
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Term
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Definition
Middle Ear--Ossicular Chain
attached to the oval window of the inner ear (smaller bone in the human body) |
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Term
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Definition
| Two parts: Auditory, Vestibular |
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Term
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Definition
Inner ear
Auditory input to the cns through the cochlea |
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Term
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Definition
-coiled structure that contains the auditory receptor cells
-two concentric fluid-filled labyrinths moving in opposite directions
Organ of Corti: house the sensory receptor cells (hair cells), as they move they generate energy |
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Term
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Definition
Inner ear
Supplies information regarding balance and spatial orientation through the vestibular system
Fibers from the inner ear exit through the internal auditory meatus and join the brainstem |
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Term
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Definition
Result of deformation, malfunction, or obstruction to the outer or middle ear
-intensity of sound reaching the inner ear is reduced
usually temporary, not a total hearing loss |
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Term
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Definition
Chronic
Fluids fill the middle ear cavity, stiffen the tympanic membrane and ossicular chain
-Purulent
-Acute
-Chronic |
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Term
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Definition
| Infection (pain, illness, drainage) |
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Term
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Definition
| Rapid onset, resolved withing 3 weeks with medication |
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Term
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Definition
| Conditions persist for more than 8 weeks |
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Term
| Sensorineural Hearing Loss |
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Definition
Absence, malformation, or damage to the inner ear (hair cells)
Congenital or acquired
Permanent loss
High frequency loss
Sound intensity disruption, sound distortion
Negative impact on speech and language |
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Term
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Definition
Inner Ear
Hearing loss due to the absence or malformation of inner ear structures during embryonic development |
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Term
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Definition
Severe to profound SL hearing loss associated with visual impairment
Genetic, progressive |
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Term
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Definition
Mild to sever SL hearing loss, pigmentation discoloration (hair and iris)
Genetic |
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Term
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Definition
SL hearing loss and kidney disease
Genetic, progressive |
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Term
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Definition
Mother contracts rubella during pregnancy
Congenital SL hearing loss (not genetic)--severe to profound |
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Term
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Definition
Bacterial infection or high fever
Severe to profound SL hearing loss
-Ototoxic (poisonous to the hearing system) levels from potent antibiotics can do the same
acquired |
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Term
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Definition
Sudden SL often accompanied with vertigo
-Unequal pressure
Often resolves on its own--various treatments
ringing in the ear
acquired, sudden onset |
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Term
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Definition
Sudden onset
Pressure build up within the inner ear, buildup of endolymphatic fluid in the cochlea
Fluctuating and progressive SL hearing loss (episodic) |
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Term
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Definition
Acquired
Benign and slow growing tumors, unilateral
Removal leads to permanent hearing loss |
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Term
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Definition
Acquire SL hearing loss. Avoidable.
Consisten exposure to sound (youth-middle age)
Stresses hair cells of the cochlea--irreversible SL
Generally starts as unilateral: one side. Other ear tries to compensate. |
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Term
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Definition
SL hearing loss due to short-term exposure that may recover spontaneously.
Could be one single exposure.
Could be permanent. |
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Term
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Definition
Occurs due to the aging process
Involves not only acuity, but sound perception
Cannot perceive sound location
True even with insignificant loss, speech perception is affected |
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