Results 161 to 170 of about 12,351 (207)

The Dimensions and Sensitivities of Semicircular Canals

Journal of Experimental Biology, 1970
ABSTRACT The dimensions of the semicircular canals of pike can be expressed as allometric functions of the body length L. The equal sensitivity of pike of different sizes to rotatory stimulation can be explained as a quadratic bending of the cupula.
J H, ten Kate, H H, van Barneveld, J W, Kuiper   +2 more
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Acoustic Stimulation of the Semicircular Canals

Otolaryngologic Clinics of North America, 1995
Stimulation of the semicircular canals provides an alternative method of vibratory stimulation of the auditory system. The frequency response characteristics of stimulation of the tympanic membrane, malleus, stapes, round window, and fenestrated semicircular canal are presented in this article.
D B, Welling, D E, Barnes
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Fistula of the lateral semicircular canal

Clinical Otolaryngology, 1978
The 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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Prostaglandins in the semicircular canal of the frog

Hearing Research, 1987
The synthesis of prostaglandins by ampulla and duct tissue isolated from the frog posterior semicircular canal was investigated in vitro. Ampulla and duct produced PGE2 (9 and 6 pg/structure, respectively) and prostacyclin (26 and 12 pg/structure). In the ampulla, prostaglandins mostly originated from the part containing dark and sensory cells and was ...
E, Ferrary, C, Bernard, O, Sterkers, B, Escoubet   +3 more
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Congenital Aplasia of the Semicircular Canals

Otology & Neurotology, 2003
To describe the underrecognized inner ear malformation characterized by complete aplasia of the labyrinthine semicircular canals associated with a relatively well-formed cochlea, to investigate its relationship with known syndromic forms of hearing loss, and to hypothesize regarding the potential embryopathogenesis of this anomaly.A retrospective case ...
Bulent, Satar, Suresh K, Mukherji, Steven A, Telian   +2 more
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Congenital Dehiscence in the Posterior Semicircular Canal

Otology & Neurotology, 2013
Posterior 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., Cisneros, A.I., Martí­nez, C., Gracia-Tello, B., Whyte, A., Crovetto, R., Crovetto, M. A.   +6 more
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Cupulolithiasis of the horizontal semicircular canal

European Archives of Oto-Rhino-Laryngology, 2011
To 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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Information process in the lateral semicircular canals

Doklady Biological Sciences, 2011
The 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., Alexandrov, V. V., Alexandrova, T. B., Vega, R., Soto, E.   +4 more
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The semicircular canals

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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Cupulolithiasis of the posterior semicircular canal

American Journal of Otolaryngology, 2013
We 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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