期刊
HEARING RESEARCH
卷 310, 期 -, 页码 69-75出版社
ELSEVIER
DOI: 10.1016/j.heares.2014.01.008
关键词
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资金
- Helene and Grant Wilson Auditory Brainstem Implant Program at the Massachusetts Eye and Ear Infirmary
- Med-EL Hearing Solutions Research Grant
- Bertarelli Foundation
- NIH [DC01089]
- Paul and Daisy Soros Fellowship for New Americans
- Victorian Government through its Operational Infrastructure Support Program
In an effort to improve the auditory brainstem implant, a prosthesis in which user outcomes are modest, we applied electric and infrared neural stimulation (INS) to the cochlear nucleus in a rat animal model. Electric stimulation evoked regions of neural activation in the inferior colliculus and short-latency, multipeaked auditory brainstem responses (ABRs). Pulsed INS, delivered to the surface of the cochlear nucleus via an optical fiber, evoked broad neural activation in the inferior colliculus. Strongest responses were recorded when the fiber was placed at lateral positions on the cochlear nucleus, close to the temporal bone. INS-evoked ABRs were multipeaked but longer in latency than those for electric stimulation; they resembled the responses to acoustic stimulation. After deafening, responses to electric stimulation persisted, whereas those to INS disappeared, consistent with a reported optophonic effect, a laser-induced acoustic artifact. Thus, for deaf individuals who use the auditory brainstem implant, INS alone did not appear promising as a new approach. (C) 2014 Elsevier B.V. All rights reserved.
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