Rehabilitation Sciences 3061A/B Lecture : Hearing Loss
2 Jan 2012
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Document Summary
How do you know someone hears you? y smile and nod y apprehension. If working in health care need to understand this fact. *hearing loss is not binary a skewed distribution. *most persons with hearing loss is mild loss. *most do not use hearing aids or other assistive technologies. What is hearing loss: y hearing function: arrival of sound to hearing organ (cochlea) imbedded into the temporal bone in the body, transduction of sound to nerve impulses, neural processing (brainstem to cortex) Just a canal for the sound to travel. If not there and other parts of ear still going to hear. Has eustachian tube that connects with the nasopharynx: easy to get infections that passes through that. Causes of hearing impairment (1) sound conduction disruptions. Examples: ear canal anomalies covering of ear canal, absence of middle ear oscicles, ruptured tympanic membrane (sky diving, scuba diving, otitis media with effusion (middle ear infection, ear plugs.
