Journal
JOURNAL OF NEUROSCIENCE
Volume 39, Issue 35, Pages 6922-6935Publisher
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.0237-19.2019
Keywords
afferent; efferent; irregular; thermal inhibition; vestibular nerve
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Funding
- National Institute on Deafness and Other Communication Disorders [RO3 DC015091]
- American Otological Society
- National Institutes of Health [RO1 DC014693]
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A group of vestibular afferent nerve fibers with irregular-firing resting discharges are thought to play a prominent role in responses to fast head movements and vestibular plasticity. We show that, in C57BL/6 mice (either sex, 4 -5 weeks old), normal activity in the efferent vestibular pathway is required for function of these irregular afferents. Thermal inhibition of efferent fibers results in a profound inhibition of irregular afferents' resting discharges, rendering them inadequate for signaling head movements. In this way, efferent inputs adjust the contribution of the peripheral irregular afferent pathway that plays a critical role in peripheral vestibular signaling and plasticity.
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