Hearing Loss

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Submitted By scarborl
Words 1021
Pages 5
Hearing Loss - Health and Resources
Tracy L. Scarborough
HCS/212
January 12, 2015
Deanna Dubay

Hearing Loss - Health and Resources
Intro
Hearing loss is one of the most common anomalies in the general population and is largely irreversible. For most, it’s caused by heredity, old age and, over time, by exposure to loud noises such as technology devices and occupational hazards. Singularly, trauma to the ears can cause short term hearing loss due to disruption in conduction. Loud venues (concert), eardrum perforation, fluid in the inner ear and excessive earwax can all cause temporary deafness. (Mayo clinic website). There are 3 passageways for hearing conduction: the outer ear, the middle ear and the inner ear.
Outer Ear The shape of the ear is designed specifically to direct sound waves. The outer ear is the part that can be externally visualized on the head, consisting of the concha (top curve of the ear), the pinna (lower trough of the ear) and the auditory canal. Sound waves travel through this anatomy and towards the tympanic membrane. (How Hearing Works printout)
Middle Ear The tympanic membrane, or eardrum, vibrates upon reception of the sound and is picked up by the bones of the middle ear (incus, malleus and stapes) and those vibrations are amplified before transmittal to the inner ear where the cochlear fluids become stimulated. When a hearing loss is traced to this area of the ear, it’s conductive and can be corrected with a simple surgical procedure or placement of hearing aids. (How Hearing Works Printout)
(Hearing Health Foundation Website)
Inner Ear Inside the cochlea, specialized hair cells respond to any movement of the cochlear fluids. Sound is then converted via the hair cells and transferred to neural signals that is moved through the auditory nerve to the brain’s central auditory complex (contained within the frontal lobe)…...

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