Results 171 to 180 of about 55,166 (194)
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Attention, Perception, and Psychophysics, 2023
For decades, researchers have assumed that shifts of covert attention mandatorily occur prior to eye movements to improve perceptual processing of objects before they are fixated. However, recent research suggests that the N2pc component-a neural measure of covert attentional allocation-does not always precede eye movements.
Steven J Luck +2 more
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For decades, researchers have assumed that shifts of covert attention mandatorily occur prior to eye movements to improve perceptual processing of objects before they are fixated. However, recent research suggests that the N2pc component-a neural measure of covert attentional allocation-does not always precede eye movements.
Steven J Luck +2 more
exaly +3 more sources
Using saccades to diagnose covert hepatic encephalopathy
Metabolic Brain Disease, 2015Covert Hepatic Encephalopathy (CHE), previously known as Minimal Hepatic Encephalopathy, is a subtle cognitive defect found in 30-70 % of cirrhosis patients. It has been linked to poor quality of life, impaired fitness to drive, and increased mortality: treatment is possible.
R H S Carpenter
exaly +3 more sources
Auris Nasus Larynx, 2013
The function of the semicircular canal receptors and the pathway of the vestibulo-ocular-reflex (VOR) can be diagnosed with the clinical head impulse test (cHIT). Recently, the video head impulse test (vHIT) has been introduced but so far there is little clinical experience with the vHIT in patients with peripheral vestibular disorders.
Leif Erik Walther, Sebastian Pannasch
exaly +3 more sources
The function of the semicircular canal receptors and the pathway of the vestibulo-ocular-reflex (VOR) can be diagnosed with the clinical head impulse test (cHIT). Recently, the video head impulse test (vHIT) has been introduced but so far there is little clinical experience with the vHIT in patients with peripheral vestibular disorders.
Leif Erik Walther, Sebastian Pannasch
exaly +3 more sources
How to Uncover the Covert Saccade During the Head Impulse Test
Otology & Neurotology, 2012 The appearance of "covert" saccades in the head impulse test in patients with vestibular loss may lead to diagnostic misinterpretations. Here, we demonstrate a procedure that can convert covert eye saccades to overt when performing the head impulse test.Patients with known vestibular deficits that have covert saccades during head impulse test ...
Fredrik, Tjernström +2 more
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Covert saccades improve dynamic visual stability in bilateral vestibular dysfunction
Klinische Neurophysiologie, 2014Murat Saglam
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Preparation of saccade sequences and eye programming affect endogenous covert attention
European Journal of Neuroscience, 2020Abstract Endogenous attention can be allocated in parallel to at least two saccade target locations of a planned sequence, but attentional resources are larger in the location of the first than the second saccade. The meridian effect that is observed in endogenous attention can be explained by eye programming, but it is not known how ...
Łukasz Michalczyk +2 more
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Pre-saccadic perceptual facilitation can occur without covert orienting of attention
Cortex, 2010The pre-motor theory of attention suggests that the mechanisms involved in target selection for eye movements are the same as those for spatial attention shifts. The pre-saccadic facilitation of perceptual discrimination at the location of a saccadic goal (paradigm of Deubel and Schneider, 1996) has been considered as an argument for this theory.
Blangero, Annabelle +8 more
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Covert Attention and Saccadic Eye Movements
2005In normal vision the eyes make overt saccadic eye movements several times each second. We have a good understanding of how saccadic targets are selected, particularly in visual search and in reading. Visual processing is enhanced at the saccade destination before the movement itself occurs, and this peripheral preview assists the smooth uptake of ...
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Journal of Neurophysiology, 2012
Covert attention modulates saccadic performance, e.g., the abrupt onset of a task-irrelevant visual stimulus grabs attention as measured by a decrease in saccadic reaction time (SRT). The attentional advantage bestowed by the task-irrelevant stimulus is short-lived: SRT is actually longer ∼200 ms after the onset of a stimulus than it is when no ...
Shaobo, Guan +3 more
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Covert attention modulates saccadic performance, e.g., the abrupt onset of a task-irrelevant visual stimulus grabs attention as measured by a decrease in saccadic reaction time (SRT). The attentional advantage bestowed by the task-irrelevant stimulus is short-lived: SRT is actually longer ∼200 ms after the onset of a stimulus than it is when no ...
Shaobo, Guan +3 more
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Covert shifts and inhibition of return in saccadic and manual responses
2012In recent, unpublished studies of our institute, we adopted the experimental design of Deubel and Schneider [1996, Vision Research, 36(12), 1827-1837], to assess the effects of covert shifts on saccadic latency. Contrary to the results of the original experiment, we found slower reactions to target stimuli presented at covertly attended locations.
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