Audiology Flashcards
How is sound amplified in the ear?
Sound is collected on a large surface and condensed into a small surface
What is the estuation tube?
The tube that connects the ear to the throat
Why do mitochondrial disorders often cause hearing loss?
The process of hearing is very energy intensive so the inner ear is very concentrated with mitochondria
So less/deficient mitochondria causes the system to be less efficient
What is the oto-acoustic emissions test?
A newborn assessment to test cochlear function
It tests the release of energy from cochlea in response to sound
Why is it beneficial to get hearing aids as early as possible if you need them?
To stimulate the auditory centres and allow for development of language in children
What is auditory brainstem response (ABR) assessment?
Tests hearing function as far as auditory brainstem
Surface electrodes measure brainstem electric potentials induced by sound source
After what age is hearing loss considered age related?
After 55yrs
Think about syndromes before that
What is hearing therapy?
Helps with adjusting to having hearing difficulties, maximising hearing, tinnitus and hyperacusis (oversensitivity to sound)
What is Tympanometry?
Measurement of function of the middle ear
How can hearing loss cause tinnitus?
The brain doesn’t quieten after hearing loss, it becomes more active
What is the central gain theory?
A model of hyperacusis that proposes loss of auditory input can result in maladaptive neuronal gain increases in the central auditory system leading to overamplification of sound
Can result in tinnitus
What is the cause of Meniere’s disease?
Poor fluid drainage
Autoimmune
Viral infection
Genetics
Diet
