Lecture 18: Hearing Across The Lifespan Flashcards
outside of ear is called
Pina
What does cochlea do?
cristals/hair in there
* vertigo happens if theres a problem here
Ear is seperated into outer, middle, and inner ear and thats improtant because we need to figuoure out which area is messed up and this allows us to subdivide it
where are the 3 small ear bones located?
middle ear (includes the timpanic membrane)
Which part of ear determines where sounds come from?
Pinna
Note the hole in the ear is the external auditory meatus
what two main things is the inner ear responsible for?
Hearing/Balance
Which 2 parts of the inner ear are used for hearing?
Cholear/fluid and hair cells inside
Which 3 parts of the inner ear are sued for balance?
Semicircular canals, urticle, saccule
can have a hearing problem anywhere along this path
Problem transferring sound waves anywhere along pathways from outer ear, tympanic membrane, or middle ear
Conductive hearing loss
* just a problem transfering those sound waves along the way
* Something is blocking the ear
* Think fluid in ear from an ear infection
Which kind of hearing loss:
* Causes in inner ear or sensory organs
* Vestibulochochlear nerve (CNVIII)
* Auditory nerve
* Brain auditory cortex-Temporal lobe
Sensorineural
can also be caused by brain injury or stroke
NOTE: You can have conductive and sensioneurla hearing loss going on at the same time
Normal age releated loss
* Unilateral or bilateral?
* Quick onset or gradual?
* Conductive or Sensiorineural
Presbycusis
* Bilatearl
* Gradual
* True sensiorineural
By what are does 1/3 of the population have hearing loss?
by 65
* However, that means that 2/3 don’t. So dont run into the room yelling
Is the inner ear affected by conductive hearing loss?
No
It impacts middle and or eternal ear
Intensity of signal is not affected
Tx: Increasing intensity of sound by speaking louder or mechanical amplification
* If it was sensriomotor and they cant process the sound it doesnt help at all
Things that cause conductive hearing loss
Things that cause sensorineural hearing loss
in resturants where there is too much noise impact here
causes of sensorineural hearing loss
Congenital hearing loss
how much of hearing loss is geentic
> 50%
can be present at birth or develop later
Autosomal recessive
Autosomal dominant
X-linked
Mitochondrial inheritance patterns
Symptoms of genetic syndrome
does not lead to normal hearing (sounds like you’re kind of under the water)
Works best if you started to talk before lost hearing
