Lecture 23; Tinnitus Flashcards
What is tinnitus?
Perception of sound not in the presence of sound.
Ringing
Describe the features of a pure tone audiogram that would indicate what it means?
The banana represents the potential Hz and db of speech
The solid black line represents hearing threshold. Anything below it is heard. The more banana below it, the more speech that can be heard.
How would a hearing loss that still has some speech/ IHC function be rectified?
Hearing aid use
How do hearing aids function?
The tune up sounds in a intensity and frequency specific manner
What do hearing aids aim to do?
Replace OHC function that doesnt exist.
Are hearing aids useful for IHC damage?
No, in this case, cochlear implants are used to stimulate the auditory nerve directly.
Describe how a cochlear implant works;
Outer unit; Detects sound Hz and intensity, then conveys this information via magnetic transduction to the internal unit
Internal unit; Surgically implanted. Stimulates auditory nerve in the inner ear.
Will a person who recieves a cochlear implant hear immediately
No, they will need to learn to hear again
if a child is born deaf, when can they recieve a cochlea implant?
Before five years of age, after this the cochlea implant will not be able to function
If an adult has sudden hearing loss, when should they receive a cochlea implant?
As soon as possible, the longer they go without implant the less likely it will be successful.
When a deaf child receives a cochlear implant, what happens to tonotopic representation?
In the auditory cortex it goes from being disarranged to somewhat arranged over time as it adjusts to the input from the cochlear implant.
What is phantom sound?
Tinnitus
What are the types of tinnitus?
True tinnitus (phantom perception)
Objective tinnitus (somatosound)
What is objective tinnitus?
True sound, normally created by blood flow near the ear creating turbulence, due to proximity near the hearing organ it can be heard.
How does tinnitus differ between females and males?
Males are more likely to suffer from tinnitus (work place history) - and have a hearing loss associated..
Females are more likely to have tinnitus in their sleep
