Optokinetic Nystagmus by Random Dot Pattern
نویسندگان
چکیده
منابع مشابه
Scotopic Optokinetic Nystagmus Thresholds
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 کاملStudy 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 ...
متن کاملVertical optokinetic nystagmus and optokinetic afternystagmus in humans.
Vertical optokinetic nystagmus (OKN) and optokinetic afternystagmus (OKAN) were recorded in 6 normal subjects using the magnetic scleral search coil technique in order to reevaluate the up-down symmetry of these responses. The effects of body position relative to gravity were investigated by comparing OKN and OKAN elicited with the subjects in an erect and in a lateral side position. No consist...
متن کاملRandom walks, random sequences, and nonlinear dynamics in human optokinetic nystagmus.
Optokinetic nystagmus (OKN) is a reflexive eye movement with target-following slow phases (SP) alternating with oppositely directed fast phases (FP). We measured the following from OKN in three humans: FP beginning and ending positions, amplitudes, and intervals and SP amplitudes and velocities. We sought to predict future values of each parameter on the basis of past values, using state-space ...
متن کاملObjective assessment of visual acuity by induction of optokinetic nystagmus.
Optokinetic nystagmus is the term applied to the nystagmus evoked by a succession of moving objects passing before the eyes (Brain, 1962). It has proved useful as a diagnostic tool in the examination of patients with neurological disease (Cogan, 1956; Huber, 1961; Smith, 1963; Walsh, 1957). Methods of inducing and suppressing optokinetic nystagmus have also been used as the basis for objective ...
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ژورنال
عنوان ژورنال: Practica oto-rhino-laryngologica. Suppl.
سال: 1989
ISSN: 0912-1870
DOI: 10.5631/jibirinsuppl1986.1989.supplement36_22