Auditory Responses to Electric and Infrared Neural Stimulation of the Rat Cochlear Nucleus
Identifieur interne : 000325 ( Pmc/Corpus ); précédent : 000324; suivant : 000326Auditory Responses to Electric and Infrared Neural Stimulation of the Rat Cochlear Nucleus
Auteurs : Rohit Verma ; Amelie A. Guex ; Kenneth E. Hancock ; Nedim Durakovic ; Colette M. Mckay ; Michaël C. C. Slama ; M. Christian Brown ; Daniel J. LeeSource :
- Hearing research [ 0378-5955 ] ; 2014.
Abstract
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.
Url:
DOI: 10.1016/j.heares.2014.01.008
PubMed: 24508368
PubMed Central: 3982200
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PMC:3982200Le document en format XML
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<front><div type="abstract" xml:lang="en"><p id="P2">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.</p>
</div>
</front>
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<front><journal-meta><journal-id journal-id-type="nlm-journal-id">7900445</journal-id>
<journal-id journal-id-type="pubmed-jr-id">4492</journal-id>
<journal-id journal-id-type="nlm-ta">Hear Res</journal-id>
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<title-group><article-title>Auditory Responses to Electric and Infrared Neural Stimulation of the Rat Cochlear Nucleus</article-title>
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<contrib-group><contrib contrib-type="author"><name><surname>Verma</surname>
<given-names>Rohit</given-names>
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<contrib contrib-type="author"><name><surname>Durakovic</surname>
<given-names>Nedim</given-names>
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<contrib contrib-type="author"><name><surname>McKay</surname>
<given-names>Colette M.</given-names>
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<xref ref-type="aff" rid="A5">5</xref>
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<aff id="A1"><label>1</label>
School of Medicine, University of Manchester, UK</aff>
<aff id="A2"><label>2</label>
School of Psychological Sciences, University of Manchester, UK</aff>
<aff id="A3"><label>3</label>
Eaton-Peabody Laboratories, Massachusetts Eye and Ear Infirmary, Switzerland</aff>
<aff id="A4"><label>4</label>
Ecole Polytechnique Fédérale de Lausanne, Switzerland</aff>
<aff id="A5"><label>5</label>
The Bionics Institute of Australia, Melbourne, Australia</aff>
<aff id="A6"><label>6</label>
Department of Otology and Laryngology, Harvard Medical School, Boston, MA 02114, USA</aff>
<author-notes><corresp id="FN1">Corresponding author: M. Christian Brown, Eaton-Peabody Laboratory, Massachusetts Eye and Ear Infirmary, 243 Charles St., Boston, MA, USA. Phone: 617-573-3875. Fax: 617-720-4408. <email>Chris_Brown@meei.harvard.edu</email>
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<year>2014</year>
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<pub-date pub-type="pmc-release"><day>01</day>
<month>4</month>
<year>2015</year>
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<volume>310</volume>
<fpage>69</fpage>
<lpage>75</lpage>
<pmc-comment>elocation-id from pubmed: 10.1016/j.heares.2014.01.008</pmc-comment>
<permissions><copyright-statement>© 2014 Elsevier B.V. All rights reserved.</copyright-statement>
<copyright-year>2014</copyright-year>
</permissions>
<abstract><p id="P2">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.</p>
</abstract>
<kwd-group><kwd>Auditory brainstem implant</kwd>
<kwd>prosthesis</kwd>
<kwd>laser</kwd>
<kwd>optical stimulation</kwd>
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</front>
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