A New Attempt for Simplified Optokinetic Nystagmus Testing Apparatus
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 کاملHuman optokinetic nystagmus: a stochastic analysis.
Optokinetic nystagmus (OKN) is a fundamental gaze-stabilizing response found in almost all vertebrates, in which eye movements attempt to compensate for the optic flow caused by self-motion. It is an alternating sequence of slow compensatory eye movements made in the direction of stimulus motion and fast eye movements made predominantly in the opposite direction. The timing and amplitude of the...
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 کاملAnticompensatory eye position ("contraversion") in optokinetic nystagmus.
The quick phases of full-field optokinetic nystagmus (OKN) not only reset the eyes, but also move them in an anticompensatory direction (that is, in the opposite direction to stimulus movement, “contraversion”).1–7 Although recognized as an oculomotor phenomenon, contraversion is poorly understood, and it has been suggested as a strategy for directing the line of sight into the visual field fro...
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ژورنال
عنوان ژورنال: Practica Oto-Rhino-Laryngologica
سال: 1973
ISSN: 1884-4545,0032-6313
DOI: 10.5631/jibirin.66.721