PMID: 11314718Apr 21, 2001Paper

Tullio phenomenon with dehiscence of the superior semicircular canal

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology
V B OstrowskiTimothy C Hain

Abstract

The goal of the investigation was to determine if vector analysis of nystagmus in a patient with the Tullio phenomenon could determine the source of the nystagmus. The Tullio phenomenon consists of the combination of vertigo and abnormal eye and/or head movements provoked by sound. Dehiscence of the superior semicircular canal can be found in certain patients with the Tullio phenomenon. The patient was tested with pure tones ranging from 250 to 3,000 Hz at 95dB HL. The time course of the three-dimensional vector of eye movement, including torsion and vertical and horizontal displacement angles was determined by individual stop-frame analysis of digitized video. Torsion amplitude varied from 1 to 7 degrees; vertical amplitude varied from 1 to 5 degrees; and horizontal amplitude varied less than 1.5 degrees. The maximal response occurred on stimulation of the right ear with a 1,250-Hz 95-dB HL tone. This elicited a reliable counterclockwise torsional and down-beating fast phase nystagmus as seen from the examiner's point of view. Comparison of the nystagmus with known canal vectors identified the right superior semicircular canal as the source of stimulation. High-resolution computed tomography scan of the temporal bone showed a ...Continue Reading

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Citations

Jun 3, 2009·Journal of Autism and Developmental Disorders·Sue Gerrard, Gordon Rugg
Nov 5, 2003·Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery·Robert A WilliamsonMarlin Sandlin
Oct 27, 2009·The Journal of Laryngology and Otology·R Suryanarayanan, T H Lesser
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May 4, 2007·Journal of the Chinese Medical Association : JCMA·Huei-Jun WuGuo-She Lee
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Nov 17, 2001·Annals of the New York Academy of Sciences·L B MinorN Weg

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