Effect of cupula shrinkage on the semicircular canal activity
Autor: | Shigetaka Shimizu, Ujimoto Konomi, Youichi Iimura, Taro Inagaki, Koji Otsuka, Mamoru Suzuki |
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Rok vydání: | 2010 |
Předmět: |
Rana catesbeiana
genetic structures Semicircular canal Endolymph business.industry Caloric response General Medicine Anatomy Stimulus (physiology) Nerve potential Semicircular Canals Crista medicine.anatomical_structure Otorhinolaryngology Bullfrog medicine Animals sense organs business Evoked Potentials |
Zdroj: | Acta Oto-Laryngologica. 130:1092-1096 |
ISSN: | 1651-2251 0001-6489 |
DOI: | 10.3109/00016481003677456 |
Popis: | Conclusion: With half-sized cupula, the semicircular canal nerve potentials decreased under slow stimulus, thus potentially leading to reduced caloric response. This also suggests that shrunken cupula may cause dizziness because of its hypermobility. Objectives: To examine the physiological effect of half-sized cupula on the semicircular canal nerve potential. Methods: The isolated cupula of the bullfrog was sectioned in half with fine scissors and was replaced on the crista. Mechanical endolymphatic flow and slow and fast stimuli were delivered and the evoked action potentials were recorded. Results: The cupula was successfully sectioned in half and was replaced on the crista. With the half-sized cupula, the action potentials became smaller under slow stimulus than under fast stimulus. |
Databáze: | OpenAIRE |
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