Results 51 to 60 of about 27,988 (163)

Symptomatic recovery in Miller Fisher Syndrome parallels vestibular-perceptual and not vestibular-ocular reflex function

Frontiers in Neurology, 2011
Unpleasant visual symptoms including oscillopsia and dizziness may occur when there is unexpected motion of the visual world across the subject’s retina (‘retinal-slip’) as in an acute spontaneous nystagmus or on head movement with an acute ...
Barry M Seemungal, Panos eMasaoutis, David eGreen, Gordon ePlant, Adolfo M Bronstein   +4 more
doaj   +1 more source

Impact of aging on long-term ocular reflex adaptation

Neurobiology of Aging, 2013
Compensatory eye movements (CEMs) stabilize the field of view enabling visual sharpness despite self-induced motion or environmental perturbations. The vestibulocerebellum makes it possible to adapt these reflex behaviors to perform optimally under novel circumstances that are sustained over time. Because of this and the fact that the eye is relatively
Gutierrez-Castellanos, Nicolas, Winkelman, Beerend H.J., Tolosa-Rodriguez, Leonardo, De Gruijl, Jornt R., De Zeeuw, Chris I.   +4 more
openaire   +3 more sources

Spontaneous Nystagmus in the Dark in an Infantile Nystagmus Patient May Represent Negative Optokinetic Afternystagmus

Frontiers in Neurology, 2018
Abnormal projection of the optic nerves to the wrong cerebral hemisphere transforms the optokinetic system from its usual negative feedback loop to a positive feedback loop with characteristic ocular motor instabilities including directional reversal of ...
Ting-Feng Lin, Ting-Feng Lin, Christina Gerth-Kahlert, James V. M. Hanson, James V. M. Hanson, Dominik Straumann, Dominik Straumann, Melody Ying-Yu Huang, Melody Ying-Yu Huang   +8 more
doaj   +1 more source

Adapting to blur produced by ocular high-order aberrations

Journal of Vision, 2011
The perceived focus of an image can be strongly biased by prior adaptation to a blurred or sharpened image. We examined whether these adaptation effects can occur for the natural patterns of retinal image blur produced by high-order aberrations (HOAs) in the optics of the eye.
Sawides, L., Gracia, Pablo de, Dorronsoro, Carlos, Webster, M., Marcos, Susana   +4 more
openaire   +3 more sources

Ocular Clocks: Adapting Mechanisms for Eye Functions and Health

Investigative Opthalmology & Visual Science, 2018
Vision is a highly rhythmic function adapted to the extensive changes in light intensity occurring over the 24-hour day. This adaptation relies on rhythms in cellular and molecular processes, which are orchestrated by a network of circadian clocks located within the retina and in the eye, synchronized to the day/night cycle and which, together, fine ...
Felder-Schmittbuhl, Marie-Paule, Buhr, Ethan, Dkhissi-Benyahya, Ouria, Hicks, David, Peirson, Stuart, Ribelayga, Christophe, Sandu, Cristina, Spessert, Rainer, Tosini, Gianluca   +8 more
openaire   +4 more sources

Multiple mechanisms of response suppression to self-induced sensation during pursuit eye movements

Royal Society Open Science
Eye movements generate a perceptual challenge, that of distinguishing self-induced sensations from movement in the world. We ask about the mechanisms involved in suppressing eye movements towards self-induced sensation, ensuring visual stability.
Omar Bachtoula, Mel Ellul Miraval, Ignacio Serrano-Pedraza, David Souto   +3 more
doaj   +1 more source

Retinal Phosphenes Induced by Transorbital Electrical Stimulation: Influence of Light Adaptation, Electrode Montage, and View Direction

Life
In this study, the perception of phosphenes was used as a surrogate identifier for stimulation sites for use in retinal-degenerative diseases. We aimed to investigate the influence of adaptation, electrode montage, and direction of view on electrically ...
Alexander Hunold, Daniela Ortega, Stefanie Freitag, Dietmar Link, Andrea Antal, Sascha Klee, Jens Haueisen   +6 more
doaj   +1 more source

Adaptation to telescopic spectacles: vestibulo-ocular reflex plasticity.

Investigative ophthalmology & visual science, 1989
The vestibulo-ocular reflex (VOR) is a mechanism for the production of rapid compensatory eye movements during head movements. To investigate the adaptation of this reflex to spectacle magnifiers, the effect on the VOR of a brief period of wearing telescopic spectacles during head rotation was studied in normal subjects.
J L, Demer, F I, Porter, J, Goldberg, H A, Jenkins, K, Schmidt   +4 more
openaire   +2 more sources

Climate Change and the Impact on Ocular Infectious Diseases: A Narrative Review

Ophthalmology and Therapy
Climate change and global warming significantly affect the incidence and distribution of infectious ocular diseases. This narrative review explores how climate-related factors—including extreme weather events, precipitation, temperature fluctuations ...
Yong Le Tong, Carlos Cifuentes-González, Kajal Agrawal, Fatma Shakarchi, Xin Ying Rachel Song, John S. Ji, Rupesh Agrawal   +6 more
doaj   +1 more source

Spike burst-pause dynamics of Purkinje cells regulate sensorimotor adaptation.

PLoS Computational Biology, 2019
Cerebellar Purkinje cells mediate accurate eye movement coordination. However, it remains unclear how oculomotor adaptation depends on the interplay between the characteristic Purkinje cell response patterns, namely tonic, bursting, and spike pauses ...
Niceto R Luque, Francisco Naveros, Richard R Carrillo, Eduardo Ros, Angelo Arleo   +4 more
doaj   +1 more source