Results 121 to 130 of about 7,177 (179)
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Abnormal vestibulo-ocular reflex
2015Abstract This is a chapter on Abnormal vestibulo-ocular reflex from the Eyes/Eye Movements section of A Manual of Neurological Signs. Most of the chapters contain a description of the sign, associated signs, and cases, supported by clinical videos and figures.
John G. Morris, Padraic J. Grattan-Smith
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The vestibulo-ocular reflex in three dimensions
Experimental Brain Research, 2002The purpose of this paper is to review the kinematics and dynamics of the vestibulo-ocular reflex (VOR) in three dimensions. We give a brief, didactic tutorial on vectors and matrices and their importance as representational schemes for describing the kinematics and dynamics of the angular and linear accelerations that activate the vestibular system ...
Theodore, Raphan, Bernard, Cohen
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Identification of the vestibulo-ocular reflex dynamics
2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2014The vestibulo-ocular reflex (VOR) plays an important role in our daily activities by enabling us to fixate on objects during head movements. Modeling and identification of the VOR improves our insight into the system behavior and helps in diagnosing various disorders.
Mina, Ranjbaran, Henrietta L, Galiana
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The Vestibulo-Ocular Reflex and Seasickness Susceptibility
Journal of Vestibular Research, 1996VOR parameters were compared in subjects at the extremes of the seasickness susceptibility scale. Thirty-nine subjects highly susceptible to seasickness and 30 nonsusceptible subjects participated in the study. The VOR was evaluated by the Sinusoidal Harmonic Acceleration (SHA) test at frequencies of 0.01, 0.02, 0.04, 0.08, and 0.16 Hz.
C R, Gordon +4 more
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Archives of Neurology And Psychiatry, 1933
THE PROBLEM The actual anatomic foundations of the concept of the reflex arc were laid by Ramon y Cajal between 1887 and 1892, when he carried out a systematic study of the spinal cord with the method of Golgi. Cajal's findings were soon confirmed by the best neuro-anatomists (van Gehuchten, von Lenhossek, Held, Retzius, von Kolliker and others).1A ...
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THE PROBLEM The actual anatomic foundations of the concept of the reflex arc were laid by Ramon y Cajal between 1887 and 1892, when he carried out a systematic study of the spinal cord with the method of Golgi. Cajal's findings were soon confirmed by the best neuro-anatomists (van Gehuchten, von Lenhossek, Held, Retzius, von Kolliker and others).1A ...
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Signal processing in the vestibulo-ocular reflex
2022In this chapter, Robinson develops models to account for the neural control of the vestibulo-ocular reflex in response to horizontal and vertical head rotations. By combining knowledge of the discharge properties of the several subpopulations of neurons that contribute to vestibular eye movements with their known anatomical connections, these models ...
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Fluctuating Vestibulo-Ocular Reflex in Ménière's Disease
Otology & Neurotology, 2017Objectives: To describe the fluctuating high velocity vestibular ocular-reflex (VOR) during the Ménière's attacks and correlate those features with pathophysiology. Patients: A patient with unilateral Ménière's disease (MD) was evaluated closely during and after acute vertigo ...
Dario A, Yacovino +2 more
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Somatosensory input influences the vestibulo-ocular reflex
Neuroscience Letters, 2009To evaluate the influence of somatosensory input on the vestibulo-ocular reflex (VOR), we used sinusoidal rotation tests in 19 young, healthy volunteers. For the control condition, subjects were sinusoidally rotated in complete darkness and with eyes opened at a frequency of 0.2 Hz with a maximum angular velocity of 30 degrees /s for 30s, and at ...
Akemi, Sugita-Kitajima, Izumi, Koizuka
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The Vertical Vestibulo-Ocular Reflex
1982If causal and teleological reasoning were clearly diametrically opposed attitudes, then tackling the central organization of vertical eye movements would indeed be a formidable task. This opening, and light, assertion is partially explained by the subsequent lengthy introduction to some of the problems posed by the descriptive, but unfortunately ...
R. Baker, W. Graf, R. F. Spencer
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Gravity and the vertical vestibulo-ocular reflex
Experimental Brain Research, 1991We studied the vertical vestibulo-ocular reflex (VOR) and vertical visual-vestibular interaction induced by voluntary pitch in the upright and onside positions in eight normal human subjects. Subjects were trained to produce sinusoidal (0.4 to 1.6 Hz) pitch head movements guided by a frequency modulated sound signal.
R W, Baloh, J, Demer
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