NURS305 Chapter Notes - Chapter 16: Conductive Hearing Loss, Sensorineural Hearing Loss, Otitis Media
23 Dec 2016
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4 openings here: tympanic membrane to external ear; cochlear window; oval window; eustachian tube. Inner ear: bony labrynth semicircular canals, vestibule, and cochlea provides body with proprioception and equilibrium, vestibular function (vestibule and semicircular canals) Related to the intensity of sound frequency (pitch) number of cycles per second the sound waves make (hz) Sound is perceived in 2 ways: (pg 390 for photo. Usually pathway for sounds to travel to the inner ear. Bone conduction passes thru external ear and delivering sound waves/vibrations to the: hearing disorders: inner ear via the skull. Conductive hearing loss when sound wave transmission through the external or middle ear is disrupted. Blocking by cerumen or fluid in the middle ear. (louder sounds will overcome the hearing loss) Sensorineural hearing loss problem somewhere beyond the middle ear (from inner ear to auditory cortex). So it can be problems in the cochlea, organ of corti, auditory nerve, auditory cortex.
