The following presentation concerns the 4 types of hearing losses. You will need a set of speakers...
15
• The following presentation concerns the 4 types of hearing losses. You will need a set of speakers or headphones to listen to the audio lecture concerning certain types of disorders. The audio lecture begins with slide # 11.
The following presentation concerns the 4 types of hearing losses. You will need a set of speakers or headphones to listen to the audio lecture concerning
The following presentation concerns the 4 types of hearing
losses. You will need a set of speakers or headphones to listen to
the audio lecture concerning certain types of disorders. The audio
lecture begins with slide # 11.
Slide 3
Four types of hearing disorders A.Conductive B.Sensorineural
C.Central D.Conversion
Slide 4
A. Conductive loss Conductive losses occur in either the outer
or middle ear. Generally these types of disorders interfere with
the conduction of sound vibrations to the inner ear.
Slide 5
1. Microtia This is the absence or malformation of the pinna.
It can be either unilateral (one-sided) or bilateral (both
sides).
Slide 6
2. Auditory canal atresia The auditory canal is either missing
or extremely narrow.
Slide 7
3. Swimmers ear This is an infection of the auditory canal.
Usually treated with antibiotic drops.
Slide 8
4. Otitis media AKA middle ear infection. Usually caused when
the Eustachian tube doesnt drain the middle ear well.
Slide 9
For chronic cases of otitis media surgery may be required.
Tubes are placed through the tympanic membrane until the Eustachian
tube can drain properly.
Slide 10
5. Otosclerosis Deposits fuse the stapes to the cochlea. Can be
corrected with surgery. Bone- conduction hearing aids are sometimes
used to bypass the ossicles.
Slide 11
B. Sensorineural hearing loss The second category of hearing
loss occurs in the inner ear and involves nerve damage.
Sensorineural loss is permanent. Other symptoms may include
tinnitus (ringing) or vertigo (dizziness).
Slide 12
Causes of sensorineural hearing loss Genetics- passed down from
a parent Auditory trauma (loud noise)- Ronald Reagan Head trauma-
I. King Jordan Ototoxic drugs- Heather Whitestone High fever-
Laurent Clerc and Helen Keller Viral diseases- Marlee Matlin
Slide 13
Other causes of sensorineural loss Rubella-virus that attacks
the fetus in the womb. Tumors-benign (non cancerous) or malignant
(cancer) Ushers syndrome- genetic condition where child is born
deaf and becomes blind Menieres disease (hearing loss with
vertigo)- Coach Nave.
Slide 14
More Sensorineural causes Presbycusis- loss from due to age
Anoxia- blue baby lack of oxygen Waardenburg syndrome- pigmentation
issues Auto-immune-Rush Limbaugh
Slide 15
C. Central loss This type of hearing loss occurs when the brain
doesnt interpret sound correctly. May involve auditory
hallucinations or problems with word recognition.
Slide 16
D. Conversion disorder This type of loss is a psychological
problem. The patients hearing ability is not physically impaired
but the patient believes he is deaf.