Results 201 to 210 of about 89,889 (238)
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Fistula of the lateral semicircular canal
Clinical Otolaryngology, 1978The principles enunciated by Adam Politzer concerning the management of fistula of the lateral semicircular canal are as true today as they were during his time, in spite of the advances made in otologic surgery during the past 25 years or more. If a fistula of the lateral semicircular canal is suspected or proven, the patient's hearing has a greater ...
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Cupulolithiasis of the horizontal semicircular canal
European Archives of Oto-Rhino-Laryngology, 2011To clarify whether positional nystagmus of horizontal cupulolithiasis contains vertical and torsional components, and to quantify the asymmetry, we analyzed nystagmus in four positions (healthy-ear-down, affected-ear-down, supine, nose-down), using 3-dimensional video-oculography.
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Multiple dehiscence of semicircular canals
The Journal of Laryngology & Otology, 2006Dehiscence of the semicircular canal is an uncommon condition and has been reported to involve the roof of the superior semicircular canal. We describe a case with dehiscence of four semicircular canals and in areas not involving the roof of the superior semicircular canal.
D, Rajenderkumar +3 more
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Congenital Dehiscence in the Posterior Semicircular Canal
Otology & Neurotology, 2013Posterior semicircular canal dehiscence (PSCD) may be of congenital origin.PSCD is characterized by the lack of bone coverage, which results in its lumen being exposed to the meninges of the posterior cranial fossa or to the gulf of the jugular vein. It has an incidence of 0.2%.
Whyte, J. +6 more
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Information process in the lateral semicircular canals
Doklady Biological Sciences, 2011The authors present a mathematical model of biosensors of angular accelerations of human head turns around the vertical axis. Information processes in the lateral semicircular canals are described by differential equations in the states space. The given model is a combination of the modified Steinhausen model and the vestibular mechanoreceptor model.
Sadovnichij, V. A. +4 more
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1983
The crista of the semicircular canal is a receptor of rotatory movement, which enables its perception in any plane of rotation. Three semicircular canals, horizontal, anterior and posterior, open into the utricle.
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The crista of the semicircular canal is a receptor of rotatory movement, which enables its perception in any plane of rotation. Three semicircular canals, horizontal, anterior and posterior, open into the utricle.
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Cupulolithiasis of the posterior semicircular canal
American Journal of Otolaryngology, 2013We sometimes experience patients with persistent torsional/vertical (upbeating) positional nystagmus in the head-hanging position. We have been convinced of the existence of cupulolithiasis of the posterior semicircular canal because such cases reveal persistent torsional/vertical (downbeating) positional nystagmus in the nose-down position.In order to
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Impulsive testing of semicircular canal function
2008After acute vestibular loss in humans or animals, eye-movement responses to rapid horizontal ipsilesional head rotations ("head impulses") show that there is severe, permanent impairment of the angular vestibulo-ocular reflex. The basis for this appears to be an inhibitory saturation of ipsilesional vestibular nerve, and perhaps vestibular nucleus ...
G Michael, Halmagyi +4 more
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Operative Techniques in Otolaryngology-Head and Neck Surgery, 2014
In the evaluation of patients with suspected superior (or posterior or lateral) semicircular canal dehiscence syndrome, imaging plays a crucial corroborative diagnostic role. The variable audiologic and vestibular signs and symptoms may be attributed to a third-window phenomenon, directly visible on computed tomography as a defect in the superior or ...
Brian D. Zipser, Ali R. Sepahdari
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In the evaluation of patients with suspected superior (or posterior or lateral) semicircular canal dehiscence syndrome, imaging plays a crucial corroborative diagnostic role. The variable audiologic and vestibular signs and symptoms may be attributed to a third-window phenomenon, directly visible on computed tomography as a defect in the superior or ...
Brian D. Zipser, Ali R. Sepahdari
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My Trip through the Semicircular Canals
The American Journal of Nursing, 1974On a Monday evening, without warning, I entered the labyrinthine world of the inner ear. I had worked my usual day at the local hospital, made supper and had done some household chores. About 7:30 P.M. I noticed a dull roar in my left ear. Within an hour, the roar had become so deafening that I was dizzy.
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