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Detection of isolated covert saccades with the video head impulse test in peripheral vestibular disorders

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.
Alexander, Blödow   +2 more
openaire   +4 more sources

Is covert attention necessary for programming accurate saccades? Evidence from saccade-locked event-related potentials

Attention, Perception, & 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.
Travis N. Talcott   +3 more
openaire   +2 more sources

Using saccades to diagnose covert hepatic encephalopathy

Metabolic Brain Disease, 2015
Covert 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.
Nicholas, Cunniffe   +6 more
openaire   +2 more sources

Preparation of saccade sequences and eye programming affect endogenous covert attention

European Journal of Neuroscience, 2020
Abstract 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
openaire   +2 more sources

Pre-saccadic perceptual facilitation can occur without covert orienting of attention

Cortex, 2010
The 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
openaire   +4 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
openaire   +2 more sources

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