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Does Decreased Static Ocular Counter Rolling Account for Bielschowsky Head Tilt Test in Unilateral Superior Oblique Palsy?
Invest Ophthalmol Vis Sci
August 2017
Samsung Medical Center, Seoul, South Korea.
Purpose: To understand the relationship of static ocular counter rolling (s-OCR) and clinical manifestations in acquired unilateral superior oblique palsy subjects during the Bielschowsky head tilt test.
Methods: Nineteen subjects that were diagnosed with acquired unilateral superior oblique palsy were included. Fundus photographs were obtained at different head tilt angles to evaluate static ocular counter rolling using a fundus camera with a cervical range of motion device.
Relationship between static ocular counterroll and Bielschowsky head tilt phenomenon.
Invest Ophthalmol Vis Sci
January 2010
Department of Ophthalmology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan.
Purpose: This study was conducted to assess how hyperdeviation of a paretic eye during ipsilesional head tilt-the Bielschowsky head tilt phenomenon (BHP)-can be explained by decreased compensatory ocular counterrolling (OCR) due to the depressed torque of the paretic superior oblique (SO) muscle.
Methods: Thirty-three patients with clinically diagnosed SO palsy and 11 control subjects were studied. With a head-mounted video camera, static ocular counterrolling (s-OCR) was determined by measuring the inclination of a line connecting the two centroids of the characteristic iris pattern and corneal reflex.
Vertical misalignment in unilateral sixth nerve palsy.
Ophthalmology
July 2002
Division of Neurology, University Health Network-Toronto Western Hospital, University of Toronto, 399 Bathurst Street, Toronto, Ontario, Canada M5T 2S8.
Objective: To detect and determine the magnitude of vertical deviation in patients with unilateral sixth nerve palsy.
Design: Prospective consecutive comparative case series.
Participants: Twenty patients with unilateral peripheral sixth nerve palsy, 7 patients with central palsy caused by brainstem lesions, and 10 normal subjects.
Hyperdeviation and static ocular counterroll in unilateral abducens nerve palsy.
Ann N Y Acad Sci
April 2002
Division of Neurology, the University of Toronto, and University Health Network - Toronto Western Hospital, Toronto, Ontario, Canada.
Calcium channelopathy mutants and their role in ocular motor research.
Ann N Y Acad Sci
April 2002
Department of Neurology, Case Western Reserve University and Cleveland Veterans Affairs Medical Center, Cleveland, Ohio 44106, USA.
Thanks to technical advances in eye movement recording, the mouse is destined to become increasingly important in ocular motor research. An advantage of this species is the wide range of existing mutant strains and techniques to generate new mutations affecting specific cell types. Mutations of ion channels may be used to modulate the intrinsic properties of neurons, and this approach may generate insight into the degree to which neuronal computations depend upon those intrinsic properties as opposed to the properties of circuits of neurons.
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