Abstract:
:Can the vestibular periphery of warm-blooded vertebrates recover functionally from severe sensory hair cell loss? Recent findings in birds suggest a mechanism for recovery but in fact no direct functional evidence has been reported. We produced vestibular hair cell lesions using the ototoxic agent streptomycin sulfate (600 mg/kg/day, 8 days, chicks, Gallus domesticus). Compound action potentials of the vestibular nerve were used as a direct measure of peripheral vestibular function. Vestibular thresholds, neural activation latencies and amplitudes were documented. Eight days of drug treatment elevated thresholds significantly (P < 0.001) and eliminated all but remnants of vestibular activity. Virtually complete physiological recovery occurred in all animals studied over a period of 70 days following treatment. Thresholds recovered within two weeks of drug treatment whereas the return of response morphologies including activation latencies and amplitudes required an additional 6-8 weeks.
journal_name
Hear Resjournal_title
Hearing researchauthors
Jones TA,Nelson RCdoi
10.1016/0378-5955(92)90184-okeywords:
subject
Has Abstractpub_date
1992-10-01 00:00:00pages
181-6issue
2eissn
0378-5955issn
1878-5891pii
0378-5955(92)90184-Ojournal_volume
62pub_type
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