Ewald's second law re-evaluated.
Patients and experimental animals (cats) with one functioning horizontal semicircular canal were tested with precise rotatory stimuli. Nystagmus responses were quantified with EOG and a laboratory digital computer. After large-magnitude stimuli there was a statistically significant difference between the maximum slow component velocity of nystagmus induced by ampullopetal endolymph flow and that induced by ampullofugal endolymph flow in all patients and cats.
D000818:Animals; D002415:Cats; D004710:Endolymph / Q000502:physiology; D005133:Eye Movements; D006801:Humans; D007759:Labyrinth Diseases / Q000175:diagnosis / Q000503:physiopathology; D012399:Rotation; D012665:Semicircular Canals / Q000502:physiology* / Q000503:physiopathology; D014724:Vestibular Function Tests