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<a href="http://doi.org/10.1186/2193-1801-3-542" target="_blank" rel="noreferrer noopener">http://doi.org/10.1186/2193-1801-3-542</a>
Pages
542–542
Volume
3
Dublin Core
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Title
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Age effects on tinnitus and hearing loss in CBA/CaJ mice following sound exposure.
Publisher
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SpringerPlus
Date
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2014
1905-7
Subject
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Acoustic trauma; Age-related hearing loss; Gap-induced suppression of the acoustic startle reflex; Tinnitus development
Creator
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Longenecker Ryan J; Chonko Kurt T; Maricich Steve M; Galazyuk Alexander V
Description
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Tinnitus is a maladaptive neuropathic condition that develops in humans and laboratory animals following auditory insult. In our previous study we demonstrated that sound exposure leads to development of behavioral evidence of tinnitus in a sample of exposed mice. However, this tinnitus mouse model did not account for long-term maladaptive plasticity or aging, factors that are commonly linked to the human tinnitus population. Therefore the same group of mice was monitored for tinnitus for 360 days post exposure. Tinnitus was assessed behaviorally by measuring gap-induced pre-pulse suppression of the acoustic startle (GPIAS). Cochlear histology was performed on both control (unexposed) and experimental mice to determine whether sound exposure caused any evident cochlear damage. We found that 360 days after exposure the vast majority of exposed mice exhibited similar gap detection deficits as detected at 84 days post exposure. These mice did not demonstrate significant loss of inner/outer hair cells or spiral ganglion neurons compared to the control sample. Lastly, we demonstrated that GPIAS deficits observed in exposed animals were unlikely exclusively caused by cochlear damage, but could be a result of central auditory maladaptive plasticity. We conclude that CBA/CaJ mice can be considered a good animal model to study the possible contribution of age effects on tinnitus development following auditory insult.
Identifier
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<a href="http://doi.org/10.1186/2193-1801-3-542" target="_blank" rel="noreferrer noopener">10.1186/2193-1801-3-542</a>
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2014
Acoustic trauma
Age-related hearing loss
Chonko Kurt T
Department of Anatomy & Neurobiology
Galazyuk Alexander V
Gap-induced suppression of the acoustic startle reflex
Longenecker Ryan J
Maricich Steve M
NEOMED College of Medicine
SpringerPlus
Tinnitus development