Results 351 to 360 of about 68,968 (381)

Saccadic instabilities and voluntary saccadic behaviour

Experimental Brain Research, 2005
Primary gaze fixation is never perfectly stable but can be interrupted by involuntary, conjugate saccadic intrusions (SI). SI have a high prevalence in the normal population and are characterised by a horizontal fast eye movement away from the desired eye position, followed, after a variable duration, by a return saccade or drift.
Gowen, E., Abadi, R. V.
openaire   +4 more sources

An Auditory-Tactile Visual Saccade-Independent P300 Brain-Computer Interface

International Journal of Neural Systems, 2016
Most P300 event-related potential (ERP)-based brain-computer interface (BCI) studies focus on gaze shift-dependent BCIs, which cannot be used by people who have lost voluntary eye movement. However, the performance of visual saccade-independent P300 BCIs
E. Yin, Timothy J. Zeyl, R. Saab, D. Hu, Zongtan Zhou, T. Chau   +5 more
semanticscholar   +1 more source

Instrumentation to stimulate gap saccades, pro-saccades, and overlap saccades

2014 40th Annual Northeast Bioengineering Conference (NEBEC), 2014
Although a great amount of research studying oculomotor function has been conducted, a full understanding of how it relates to and is affected by neurological and neurodegenerative disorders is still warranted. This experiment seeks to build a system comparing pro-saccades, gap saccades, and overlap saccadic eye movements.
Silvana L Costa, Tara L. Alvarez, Hassan Muhammad, David Thibodeaux   +3 more
openaire   +2 more sources

Saccadic Inhibition in Voluntary and Reflexive Saccades

Journal of Cognitive Neuroscience, 2002
Abstract The present study investigated saccadic inhibition in both voluntary and stimulus-elicited saccades. Two experiments examined saccadic inhibition caused by an irrelevant flash occurring subsequent to target onset. In each trial, participants were required to perform a single saccade following the presentation of a black target ...
Dave M. Stampe, Eyal M. Reingold
openaire   +3 more sources

Disorders of saccades

Current Neurology and Neuroscience Reports, 2007
Saccades are rapid eye movements that assist vision by pointing the fovea of the retina, which contains the highest density of photoreceptors, at features of interest in the visual environment. A great deal is now known about the properties and neurobiology of saccades in both health and disease states.
Robert L. Tomsak, Matthew J. Thurtell, R. John Leigh   +2 more
openaire   +3 more sources

Contextual saccade adaptation induced by sequential saccades

Journal of Neurophysiology, 2022
This study reveals a new type of contextual saccade adaptation: sequential saccades are able to induce contextual saccade adaptation when direction, amplitude, or the existence of preceding and following saccades are used as contexts. These novel findings are also consistent with the idea that saccades made in a sequence are planned concurrently ...
Reza Azadi, Robert M. McPeek
openaire   +2 more sources

Exploring and targeting saccades dissociated by saccadic adaptation

Brain Research, 2011
Saccadic adaptation maintains saccade accuracy and has been studied with targeting saccades, i.e. saccades that bring the gaze to a target, with the classical intra-saccadic step procedure in which the target systematically jumps to a new position during saccade execution.
Thérèse Collins, Thérèse Collins, Louisa Lavergne, Christelle Lemoine, Christelle Lemoine, Karine Doré-Mazars, Karine Doré-Mazars, Karine Doré-Mazars, Dorine Vergilino-Perez, Dorine Vergilino-Perez, Dorine Vergilino-Perez   +10 more
openaire   +3 more sources

Foveating saccades

Vision Research, 1990
A review of the literature revealed that foveating saccades were found to be faster than other fast eye movements (FEMs) except optokinetic nystagmus (OKN) quick phase. In the present experiment, foveating saccades were compared to OKN quick phase in humans and were found to have higher maximum speeds and shorter durations. Unlike previous experiments,
S G, Whittaker, R W, Cummings
openaire   +2 more sources

Corrective saccades: Effect of shifting the saccade goal

Vision Research, 1982
A double step paradigm was used to investigate the saccade control, in particular the role of retinal feedback on correction saccades. The first target step eliciting the primary saccade had an amplitude of 10-15 deg and was followed by a second target step of 3 deg which occurred 0-300 msec after the onset of the primary saccade.
W. Wolf, Heiner Deubel, Gert Hauske
openaire   +3 more sources

Fixation and saccade control in an express-saccade maker

Experimental Brain Research, 1996
In express-saccade makers a large incidence of express saccades (latencies around 100 ms) is paralleled by a reduced ability to suppress saccade generation when required. Such a behavior occurs frequently in dyslexics. We studied the latencies and the metrical properties of saccades in the very rare case of an adult, nondyslexic express-saccade maker ...
Cavegn, Daniel, Biscaldi, Monica
openaire   +4 more sources