title: Effect of cupula shrinkage on the semicircular canal activity.
abstract: CONCLUSIONS
  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.
  
  
  OBJECTIVE
  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.
authors.affiliation: Department of Otolaryngology, Tokyo Medical University, Japan.
authors.forename: Youichi
authors.initials: Y
authors.lastname: Iimura
authors.forename: Mamoru
authors.initials: M
authors.lastname: Suzuki
authors.forename: Koji
authors.initials: K
authors.lastname: Otsuka
authors.forename: Taro
authors.initials: T
authors.lastname: Inagaki
authors.forename: Ujimoto
authors.initials: U
authors.lastname: Konomi
authors.forename: Shigetaka
authors.initials: S
authors.lastname: Shimizu
mesh_terms: D000818:Animals; D004710:Endolymph / Q000502:physiology; D005071:Evoked Potentials / Q000502:physiology*; D011892:Rana catesbeiana; D012665:Semicircular Canals / Q000294:innervation / Q000502:physiology*