نتایج جستجو برای: gaze stability

تعداد نتایج: 312408  

Journal: :iranian journal of otorhinolaryngology 0
seyyed amir hossein ghazizadeh hashemi department of ent, school of medicine, shahid beheshti university of medical sciences, tehran, iran. sadegh jafarzadeh department of audiology, school of paramedical sciences, mashhad university of medical sciences, mashhad, iran. majid haddadi aval department of audiology, school of paramedical sciences, mashhad university of medical sciences, mashhad, iran. reza hosseinabadi department of audiology, tehran university of medical sciences, tehran, iran.

introduction: patients with bilateral weakness (bw) have many difficulties in gaze stability that interfere with their normal function. the aim of this study was to evaluate ocular motor functions in patients with bw to better understand the problem of gaze instability in these patients.   materials and methods: patients were referred from the otolaryngology department for vestibular assessment...

Introduction: Patients with bilateral weakness (BW) have many difficulties in gaze stability that interfere with their normal function. The aim of this study was to evaluate ocular motor functions in patients with BW to better understand the problem of gaze instability in these patients.   Materials and Methods: Patients were referred from the Otolaryngology Department for Vestibular Assessmen...

Journal: :Journal of neurophysiology 2008
Asim Haque Mridha Zakir J David Dickman

Many motion related behaviors, such as gaze stabilization, balance, orientation, and navigation largely depend on a properly functioning vestibular system. After vestibular insult, many of these responses are compromised but can return during the regeneration of vestibular receptors and afferents as is known to occur in birds, reptiles, and amphibians. Here we characterize gaze stability in pig...

Journal: :The Australian journal of physiotherapy 2006
Nancy Low Choy Natalie Johnson Julia Treleaven Gwendolen Jull Benedict Panizza David Brown-Rothwell

QUESTION Are there residual deficits in balance, mobility, and gaze stability after surgical removal of vestibular schwannoma? DESIGN Observational study. PARTICIPANTS Twelve people with a mean age of 52 years who had undergone surgical removal of vestibular schwannoma at least three months previously and had not undergone vestibular rehabilitation. Twelve age- and gender-matched healthy pe...

Journal: :Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology 2010
Michael C Schubert Courtney D Hall Vallabh Das Ronald J Tusa Susan J Herdman

OBJECTIVE Vestibular adaptation exercises have been shown to improve gaze stability during active head rotation in individuals with vestibular hypofunction. Little is known, however, of the types of eye movements used during passive head rotation and their effect on gaze stability in individuals with vestibular hypofunction. The primary purpose of this study was to determine differences in ocul...

2013
Rosalyn M. Schneider Matthew J. Thurtell Sylvia Eisele Norah Lincoff Elisa Bala R. John Leigh

When normal subjects fix their eyes upon a stationary target, their gaze is not perfectly still, due to small movements that prevent visual fading. Visual loss is known to cause greater instability of gaze, but reported comparisons with normal subjects using reliable measurement techniques are few. We measured binocular gaze using the magnetic search coil technique during attempted fixation (mo...

2016
Jianliang Tong Jun Maruta Kristin J. Heaton Alexis L. Maule Umesh Rajashekar Lisa A. Spielman Jamshid Ghajar

To aid a clear and unified visual perception while tracking a moving target, both eyes must be coordinated, so the image of the target falls on approximately corresponding areas of the fovea of each eye. The movements of the two eyes are decoupled during sleep, suggesting a role of arousal in regulating binocular coordination. While the absence of visual input during sleep may also contribute t...

2018
Stephanie E. Haggerty W. Michael King

The Vestibulo-Ocular Reflex (VOR) works to stabilize gaze during unexpected head movements. However, even subjects who lack a VOR (e.g., vestibulopathic patients) can achieve gaze stability during planned head movements by using pre-programmed eye movements (PPEM). The extent to which PPEM are used by healthy intact subjects and how they interact with the VOR is still unclear. We propose a mode...

2016
Michael A. Busa Jongil Lim Richard E. A. van Emmerik Joseph Hamill

Individuals regulate the transmission of shock to the head during running at different stride frequencies although the consequences of this on head-gaze stability remain unclear. The purpose of this study was to examine if providing individuals with visual feedback of their head-gaze orientation impacts tibial and head accelerations, shock attenuation and head-gaze motion during preferred speed...

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