Unlike saccades, quick phases of optokinetic nystagmus (OKN) are not preceded by shifts of attention
نویسندگان
چکیده
منابع مشابه
Comparison of the main sequence of reflexive saccades and the quick phases of optokinetic nystagmus.
BACKGROUND/AIMS Abnormalities in the saccadic main sequence are an important finding and may indicate pathology of the ocular motor periphery or central neurological disorders. In young or uncooperative patients it can be difficult eliciting a sufficient number of saccades to measure the main sequence. It is often assumed that the quick phases of optokinetic nystagmus (OKN) are identical to sac...
متن کاملOptokinetic nystagmus (OKN) suppression by fixation of a stabilized target: the effect of OKN-stimulus predictability
In previous work, subjects looked at a target stabilized at the fovea, superimposed on a sinusiodally moving OKN stimulus. The stabilized target (no retinal-slip) suppressed OKN leaving residual eye movements that were often in counterphase with the OKN stimulus motion. In the present study we explored how this type of suppression of OKN is influenced by OKN stimulus predictability: OKN stimulu...
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Quick phases of vestibular nystagmus and saccades were compared on the basis ofthe shape of their time courses and their amplitude-duration relationships in the alert intactmonkey. Both rapid movements are almost identical when nystagmus is induced naturally byrotation. Visual field structure, illumination and darkness affect the speed of both types ofmovements similarly. This i...
متن کاملSaccades Detection in Optokinetic Nystagmus - a Fuzzy Approach
The analysis of eye movements is valuable in both clinical work and research. One of the characteristic type of eye movements is saccade. The accurate detection of saccadic eye movements is the base for further processing of saccade parameters such velocity, amplitude and duration. This paper presents an accurate saccade detection method which is supported by the fuzzy clustering. The proposed ...
متن کاملVertical optokinetic nystagmus and saccades in normal human subjects.
PURPOSE Optokinetic stimulation induces nystagmus that can be used to test the saccadic and visual-tracking systems in some patients with voluntary gaze palsies. The purpose of this study was to characterize vertical optokinetic nystagmus (OKN) in normal human subjects, comparing the dynamic properties of the quick phases with voluntary saccades of similar size and measuring the slow-phase resp...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2019
ISSN: 1534-7362
DOI: 10.1167/19.10.53c