The effect of vestibulo-ocular reflex deficits and covert saccades on dynamic vision in opioid-induced vestibular dysfunction. [PDF]
PLoS ONE, 2014 Patients with bilateral vestibular dysfunction cannot fully compensate passive head rotations with eye movements, and experience disturbing oscillopsia.
Cecilia Ramaioli +6 more
doaj +9 more sources
Short-Latency Covert Saccades - The Explanation for Good Dynamic Visual Performance After Unilateral Vestibular Loss? [PDF]
Frontiers in Neurology, 2021 Background: Functional head impulse test (fHIT) tests the ability of the vestibulo-ocular reflex (VOR) to allow visual perception during head movements. Our previous study showed that active head movements to the side with a vestibular lesion generated a
Julia Sjögren +5 more
doaj +5 more sources
Covert oculo-manual coupling induced by visually guided saccades. [PDF]
Frontiers in Human Neuroscience, 2013 Hand pointing to objects under visual guidance is one of the most common motor behaviors in everyday life. In natural conditions, gaze and arm movements are commonly aimed at the same target and the accuracy of both systems is considerably enhanced if ...
Luca eFalciati +2 more
doaj +3 more sources
The Role of Neck Input in Producing Corrective Saccades in the Head Impulse Test
Frontiers in Neurology, 2022 BackgroundThe head impulse test is a valuable clinical test that can help identify peripheral vestibular dysfunction by observing corrective saccades that return the eyes to the target of interest.
Shinichi Iwasaki +5 more
doaj +3 more sources
What determines the direction of microsaccades? [PDF]
Journal of Eye Movement Research, 2010 During visual fixation, our eyes are not entirely still. Instead, small eye movements, such as microsaccades, can be observed. We here investigate what determines the direction and frequency of these microsaccades, as this information might help to ...
Frouke Hermens, Robin Walker
doaj +3 more sources
Pre-saccadic Attention (and not Arousal) modulates the Size-Eccentricity Effect [PDF]
Scientific ReportsPeripherally located objects are often perceived to be smaller than centrally located objects. This perceptual phenomenon, known as the Size-Eccentricity Effect (SEE), is mainly due to the structural properties of the visual system and is further ...
Jad Laaboudi +2 more
doaj +2 more sources
Compensatory saccade in the vestibular impaired monkey
Frontiers in Neurology, 2023 IntroductionLoss of the vestibulo-ocular reflex (VOR) affects visual acuity during head movements. Patients with unilateral and bilateral vestibular deficits often use saccadic eye movements to compensate for an inadequate VOR.
Yoshiko Kojima +4 more
doaj +1 more source
Video head impulse test in bilateral vestibulopathy
Brazilian Journal of Otorhinolaryngology, 2022 Introduction: Bilateral vestibulopathy is a rare chronic condition with multiple etiologies. Bilateral vestibulopathy is characterized mainly by unsteadiness when walking or standing, which worsens in darkness, as well as oscillopsia.
Mayada Elsherif, Mirhan Eldeeb
doaj +1 more source
Counterproductive effect of saccadic suppression during attention shifts. [PDF]
PLoS ONE, 2014 During saccadic eye movements, the processing of visual information is transiently interrupted by a mechanism known as "saccadic suppression" [1] that is thought to ensure perceptual stability [2]. If, as proposed in the premotor theory of attention [3],
Alexandre Zénon +4 more
doaj +1 more source
Enhanced Eye Velocity With Backup Saccades in vHIT Tests of a Menière Disease Patient: A Case Report
Frontiers in Surgery, 2021 Reduced eye velocity and overt or covert compensatory saccades during horizontal head impulse testing are the signs of reduced vestibular function. However, here we report the unusual case of a patient who had enhanced eye velocity during horizontal head
Maria Montserrat Soriano-Reixach +6 more
doaj +1 more source