NSG 2317 Lecture Notes - Lecture 16: Eustachian Tube, Vestibulocochlear Nerve, Semicircular Canals
22 Jan 2018
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Document Summary
Structure and function: external ear, middle ear, inner ear. Hearing: auditory system levels, basilar membrane, organ of corti. Pathways of hearing: air conditioning, bone conduction. Hearing loss: conductive - mechanical dysfunction of the external or middle ear, sensorineural (perceptive) - inner ear or cranial nerve viii, cerebral cortex, mixed loss. Equilibrium - labyrinth inner ear: vertigo - spinning. Developmental considerations: infants and children, adults, older adults. Cultural and social considerations: increased incidence of otitis media in, cerumen. Hearing loss third most common chronic condition in older adults. Smoke exposure ear and not in the ear. What relieves it: infections - history as a child. Injury: additional history for infants and children. Pneumatic bulb attachment (sometimes needed with infants or young children) External auditory meatus: external eat - inspect palpate, otoscopic examination, external canal. Integrity of membrane: tympanic membrane, test hearing acuity. Do not yield reliable or precise data: vestibular apparatus. Behavioral manifestations of hearing loss: older adults.
