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Hopkins study proves cochlear implants prevent or reverse damage to brain's auditory nerve system

ansmitter chemicals necessary to pass sound signals between nerve cells; and the specialized nerve membranes that receive the signal were small and dome-shaped. In the deaf cats without implants, synaptic vesicles were absent, and the specialized nerve membranes were large and flat.

Niparko, who has for more than 20 years been studying the effects of hearing restoration in children, says the next research goal is to determine what happens between birth and puberty in the auditory system to diminish the chances of restoring hearing and language skills over time. Future experiments will evaluate brain changes that occur when an animal grows up in an environment that is devoid of sound, which the scientists believe will guide future therapies in restoring useful hearing to the deaf.


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Contact: David March
dmarch1@jhmi.edu
410-955-1534
Johns Hopkins Medical Institutions
1-Dec-2005


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