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Cochlear dead regions (DRs) are defined as a total loss of inner hair cell function across a limited region of the basilar membrane (Moore, et al., 1999b). This does not result in an inability to perceive sound at a given frequency range, rather the sound is perceived via a spread of excitation to adjacent regions in the cochlea where the inner hair cells are still functioning.
This type of hearing loss is sensorineural, which means there is damage to the tiny hair cells in the part of the inner ear called the cochlea. Because of this damage, sound cannot reach the auditory nerve. With a cochlear implant, the damaged hair cells are bypassed, and the auditory nerve is stimulated directly.The cochlear implant does not result in ârestoredâ or âcuredâ hearing. It does, however, allow for the perception of the sensation of sound.his type of hearing loss is sensorineural, which means there is damage to the tiny hair cells in the part of the inner ear called the cochlea. Because of this damage, sound cannot reach the auditory nerve. With a cochlear implant, the damaged hair cells are bypassed, and the auditory nerve is stimulated directly.