Results 251 to 260 of about 48,579 (308)
Unilateral pallidotomy for Parkinson’s disease disrupts ocular fixation
Journal of Clinical Neuroscience, 2003 Although some motor functions of the basal ganglia have been well studied, the oculomotor functions are not well established. We studied eye movements in patients with Parkinson's disease (PD) undergoing pallidotomy to assess the role of the globus pallidus interna (GPi) in oculomotor control.
O'Sullivan, JD +5 more
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Localization of Static Positional Nystagmus With the Ocular Fixation Test
The Laryngoscope, 1999 AbstractObjective: Characteristics of static positional nystagmus (SPN) (i.e., persistency, direction fixed, direction changing) are observed in both peripheral and central disturbances and possess no localizing value for vestibular lesions. Our objective was to investigate whether the ocular fixation test as applied to SPN could assist in localizing ...
Maire R, Duvoisin B
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Ocular fixation and macular integrity by microperimetry in multiple sclerosis
Graefe's Archive for Clinical and Experimental Ophthalmology, 2020 To characterize the fixation and macular integrity of subjects with multiple sclerosis (MS) with and without previous optic neuritis (ON) using microperimetry (MP).Fifty-five eyes of MS patients, subdivided into three groups (28 eyes without ON, 16 with previous ON, and 11 eyes with previous ON in the contralateral eye), and 43 healthy eyes were ...
Amparo Gil-Casas +2 more
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Ocular fixation index and mathematical models.
Acta oto-rhino-laryngologica Belgica, 1998 Ocular fixation test and ocular fixation index (OFI) never have been interpreted in terms of mathematical models, despite their widespread diffusion. However, ocular fixation is a typical case of visual-vestibular interaction, and mathematical models have proven very helpful in interpreting some mechanisms of this interaction, e.g.
BUIZZA, ANGELO
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Ocular fixation, vestibular dysfunction, and visual motion hypersensitivity
Optometry - Journal of the American Optometric Association, 2009 A subgroup of individuals with vestibular dysfunction and visual motion hypersensitivity (VMH) become dizzy and imbalanced in response to movement of the visual environment. The purpose of this study was to investigate ocular fixational stability during gaze on a target, with and without visual background movement.
Winkler, Patricia A. +1 more
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Effect of ocular fixation on positional nystagmus in BPPV patients
International Journal of Audiology, 2022The quantitative suppression rate of positional nystagmus (PN) by ocular fixation (OF) is unknown. This study aims to analyse the effect of OF on the slow phase velocity (SPV) of PN during diagnostic positional manoeuvres (DPMs) with videonystagmography in patients with benign paroxysmal positional vertigo (BPPV).DPMs were performed on 58 patients with
Halil Erdem Özel +5 more
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The Effect of Ocular Fixation on the Caloric Nystagmus
ORL, 2010The effect of fixation and nonfixation upon the caloric nystagmus was studied in 30 normal volunteers. All four nystagmus parameters (frequency, slow phase velocity, amplitude, and duration) were analyzed and statistically evaluated. This information in normals is essential to comprehend certain nystagmic observations suspected to have pathognomonic ...
E M, Molnar, N, Torok
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Ocular fixation with quadriceps tendon allograft
Cell and Tissue Banking, 2002Management of difficult strabismus, such as strabismus fixus and paralytic strabismus, in order to maintain the alignment is complicated. There are many surgical approaches described in the current literature, together with notes on the materials used to stabilize these deformities.
Sorot, Wutthiphan +4 more
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Ocular Motor Fixation Deficits in Friedreich Ataxia
The Cerebellum, 2010Friedreich ataxia (FRDA) is the most common genetic cause of ataxia with a prevalence of approximately 1 in 29,000. Ocular motor abnormalities are common in FRDA and include fixation instability, saccadic dysmetria, and vestibular dysfunction. It has not yet been determined whether aspects of spatial attention, which are closely coupled to eye ...
Hocking, Darren +6 more
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