Characteristics of Postrotatory Nystagmus and Optokinetic After Nystagmus.
نویسندگان
چکیده
منابع مشابه
Study of congenital nystagmus: optokinetic nystagmus.
A severe defect of optokinetic nystagmus (OKN) was found in 46 patients with congenital nystagmus. Abnormal patterns of OKN, such as superimposition of pendular oscillations on the optokinetic slow component and inversion of OKN, were observed. Optokinetic gain (eye movement velocity/drum velocity) was decreased compared to that in normal subjects, and optokinetic after-nystagmus, or transient ...
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Although it is now well established that a variety of ocular and systemic diseases, including diabetes, are harmful to the SWS cone pathway, causing a decrease in SW sensitivity,"the site(s) of the loss is not well known. The loss in SW sensitivity in diabetes has been variously attributed to changes in the lens, loss of SWS cone receptors due to their greater vulnerability to insult, the reduc...
متن کاملEXTENDED REPORT Torsional optokinetic nystagmus: normal response characteristics
Background/aims: Few studies have investigated normal response characteristics of torsional optokinetic nystagmus (tOKN). The authors have investigated the effect of stimulus velocity and central/peripheral stimulation on tOKN. Methods: Torsional OKN was elicited using a sinusoidal grating rotating at velocities of 3 /̊s to 1000 /̊s in clockwise and anticlockwise directions. To investigate the ef...
متن کاملTorsional optokinetic nystagmus after unilateral vestibular loss: asymmetry and compensation.
The aim of this study was to analyse torsional optokinetic nystagmus (tOKN) in 17 patients with Menière's disease before and after (1 week, 1 month and 3 months) a curative unilateral vestibular neurotomy (UVN). The tOKN was investigated during optokinetic stimulations around the line of sight directed towards either the lesioned or the healthy side, at various constant angular velocities. Dyna...
متن کاملDirection and magnitude of head tilt alter postrotatory nystagmus.
TO THE EDITOR: We read the article by Wang and Lewis (2016) with a great interest. In this study, using the axis shift and dumping index, they found that the “residual sensory conflict” correlates with motion sickness susceptibility in patients with vestibular migraine. This could explain the motion intolerance and episodic vertigo that characterize vestibular migraine based on dysfunction of t...
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ژورنال
عنوان ژورنال: Equilibrium Research
سال: 1993
ISSN: 0385-5716,1882-577X
DOI: 10.3757/jser.52.466