Task saccade latency saccades. Medical search. Frequent questions

In 10 normal subjects, we studied the performance of visually guided saccade (VGS), gap saccade (GAP), and memory guided saccade (MGS) tasks before and after exposure to EMF emitted by a mobile phone for thirty minutes or sham exposure. (emfacts.com)
To elucidate behavioral effects of reward expectation on saccade latency, we employed a visually guided saccade task with asymmetrical reward schedule. (elsevierpure.com)

To our knowledge, there has not been a large-N examination of the temporal properties of saccades and fixations in scenes. (frontiersin.org)
As a consequence, the properties of saccades and smooth pursuit were studied independently. (eneuro.org)

We report baseline measures of eye movement behavior in our sample, including mean fixation duration, saccade amplitude, and initial saccade latency. (frontiersin.org)

The duration of each fixation and the amplitude of the saccades between them vary with the contents of the current scene, the viewer's task, and unique aspects of the individual viewer. (frontiersin.org)
Typical saccade amplitudes and fixation durations have been described by relatively small-N studies and reviews over the years. (frontiersin.org)
General estimates of saccade amplitude and fixation durations are valuable to our understanding of how we process scenes. (frontiersin.org)
However, both saccade amplitude and fixation duration are influenced by a variety of factors. (frontiersin.org)
During the actual eye movement (or saccade ), vision is suppressed and new information is acquired only during the fixation (the period of time when the eyes remain relatively still). (scholarpedia.org)
From this table, it is immediately apparent that while the values presented in the table are quite representative of the different tasks, they show a range of average fixation durations and for each of the tasks there is considerable variability both in terms of fixation durations and saccade lengths. (scholarpedia.org)
This conclusion was based on the relatively long latencies of eye movements (or reaction time of the eyes) and the large variability in the fixation time measures. (scholarpedia.org)
They questioned the influence of cognitive factors on fixations given that eye movement latency was so long and the fixation times were so variable. (scholarpedia.org)
Within a research laboratory environment, fixation will be highly preserved at the achieve focus on prior to the reaching is finished, any occurrence known as "gaze anchoring.Inches Even though traditional records of these tight eye-hand control have often accentuated the interior synergetic linkage among the two engine methods, newer ideal management ideas regard generator control because versatile means to fix task needs. (epirubicininhibitor.com)
A screen-based eye tracker for extensive research from fixation-based studies to micro-saccades. (tobii.com)
This powerful research system supports from fixation to saccade-based research outside of the lab. (tobii.com)
By coding the Cookie Theft picture into areas of interest, the researchers fused eye tracking data - fixation, saccades, and pupil size - with language data. (tobii.com)

Subjects performed reflexive saccades, deferred saccades, and memory-guided saccades along the shaft of the illusion. (ru.nl)
Measure the brain's ability to execute or suppress reflexive eye movements with saccade and anti-saccade tests. (tobii.com)

From these studies, it is thought that saccades in scenes tend to be 2-4° in amplitude ( Henderson and Hollingworth, 1998 ) and fixations tend to last 200-300 ms ( Rayner, 2009 ). (frontiersin.org)
Saccades are fast "jumps" that the eye performs between fixations in a static environment. (eyeware.tech)

Behavior in a visual search task with moving dot stimuli. (ucla.edu)
Pre-saccadic attention spreads to stimuli forming a perceptual group with the saccade target, Cortex, 140, 179-198. (hu-berlin.de)
Here, we show that the magnitude of perceptual compression for a wide variety of probe stimuli and saccade amplitudes is quantitatively predicted by a simple heuristic model based on the geometry of retinotopic representations in the primate brain. (jneurosci.org)
For humans, visual tracking of moving stimuli often triggers catch-up saccades during smooth pursuit. (eneuro.org)

These regions are reciprocally connected with structures in the basal ganglia although the contribution of these sub-cortical structures to oculomotor control in complex tasks is not well understood. (lincoln.ac.uk)
Under this assumption, the psychophysical data on perisaccadic compression can be appreciated intuitively by imagining that, around the time of a saccade, the brain confounds nearby oculomotor and sensory signals while attempting to localize the position of objects in visual space. (jneurosci.org)

Both areas contained saccade-related activity that predicted the direction/timing of eye movements. (elifesciences.org)
Although eye movements have been examined for some time, it has only been in the last few decades that their measurement has led to important discoveries about psychological processes that occur during such tasks as reading, visual search , and scene perception. (scholarpedia.org)
Because eye movements are essentially motor movements, it takes time to plan and execute a saccade. (scholarpedia.org)
There is considerable evidence that the nature of the task influences eye movements. (scholarpedia.org)
In a natural environment, saccade and vergence eye movements shift gaze in different directions and distances. (njit.edu)
The recruitment of saccades may be utilized because of the longer period of diplopia resulting from slower vergence movements. (njit.edu)
The switch between these continuous and discrete eye movements is a trade-off between tolerating sustained position error (PE) when no saccade is triggered or a transient loss of vision during the saccade due to saccadic suppression. (eneuro.org)
Thus, accurate tracking requires a synergistic coordination of saccades and smooth pursuit eye movements to overcome retinal position and velocity mismatches, respectively. (eneuro.org)

We compared it to the influence of presentation time on the illusion effect in a perceptual judgment task. (ru.nl)
In contrast with this hypothesis, our results show that the illusion affected both saccade amplitude and perceptual judgments with a similar time course. (ru.nl)
Perceptual learning while preparing saccades. (hu-berlin.de)
A perceptual decision-making task was administered. (mit.edu)

Possible PSP requires the presence of a gradually progressive disorder with onset at age 40 or later, either vertical supranuclear gaze palsy or both slowing of vertical saccades and prominent postural instability with falls in the first year of onset, as well as no evidence of other diseases that could explain these features. (neurology.org)
We all here looked into to what diploma gaze management in the course of hitting is actually modulated simply by task calls for. (epirubicininhibitor.com)

Here, we contrast whole-brain activity during spatial and non-spatial auditory attention tasks, asking whether different cortical areas participate when listeners attend to location versus pitch. (frontiersin.org)
No significant effect of mobile phone use was demonstrated on the performance of various saccade tasks, suggesting that the cortical processing for saccades and attention is not affected by exposure to EMF emitted by a mobile phone. (emfacts.com)
Specifically, we propose that perisaccadic compression is determined by the distance between the probe and saccade end point on a map that has a logarithmic representation of visual space, similar to those found in numerous cortical and subcortical visual structures. (jneurosci.org)

Here we examine the origin of this variability by testing the influence of three temporal factors on the effect of the Muller-Lyer illusion: presentation time, response delay, and saccade latency. (ru.nl)
High CISS scores were correlated with variability and increased latency. (arvojournals.org)
Informed by model predictions, we hypothesized that saccade trigger time length and variability will increase when pre-saccadic predicted errors are small or visual uncertainty is high (e.g., for blurred targets). (eneuro.org)

Vergence and rehabilitation tasks were performed with a trapezoid surface of light emitting diodes (LEDs) and adjacent buzzers (US 8851669). (arvojournals.org)
however, saccades occur during the vergence movement even though the stimulus should not stimulate a saccadic response. (njit.edu)
These saccades may facilitate the response when the kinematics of the vergence component are modest as indicated by reduced velocities. (njit.edu)
Hence, the purpose of this study is to assess whether the frequency of saccades within vergence responses are correlated with vergence peak velocity. (njit.edu)
A saccade detecting algorithm was utilized to compute the percentage of saccades present within all vergence responses. (njit.edu)
When the vergence peak velocity was slow, a greater number of saccades was observed. (njit.edu)
The average vergence peak velocities were inversely correlated to the number of saccades observed within the transient portion defined as after the latency to 400. (njit.edu)
An increased prevalence of saccades was observed in vergence responses with reduced peak velocity, compared to responses with greater peak velocity. (njit.edu)
Prior research supports that saccades increase the peak velocity of vergence during combined vergence and saccadic tasks. (njit.edu)
This may in part explain the increased presence of saccades within vergence responses with reduced peak velocities. (njit.edu)

I decided to run a few short experiments that could test the basic eye-tracking metrics: point-of-regard estimation accuracy and precision, saccade trajectory and velocity, and changes pupil size. (pygaze.org)

demonstrated that catch-up saccades were less likely to occur when the target re-crosses the fovea within 40-180 ms. To date, there is no mechanistic explanation for how the trigger decision is made by the brain. (eneuro.org)

Definition, modeling and detection of saccades in the face of post-saccadic oscillations. (hu-berlin.de)
Intra-saccadic motion streaks as cues to linking object locations across saccades. (hu-berlin.de)

We previously showed that macaque caudal intraparietal (CIP) area neurons possess robust 3D visual representations, carry choice- and saccade-related activity, and exhibit experience-dependent sensorimotor associations (Chang et al. (elifesciences.org)
Sensorimotor associations between 3D orientation and saccade direction preferences were stronger in CIP than V3A, and moderated by choice signals in both areas. (elifesciences.org)
Our results add support for a common and shared sensorimotor process for saccades and pursuit. (eneuro.org)
Consequently, our current understanding describes saccades and pursuit as two outcomes of a synergistic sensorimotor process, sharing sensory inputs, anatomic pathways, and functional regulation ( Orban de Xivry and Lefèvre, 2007 ). (eneuro.org)

The monkey had to make an immediate saccade to a peripheral visual target in every trial, but was rewarded for a correct saccade to only one of four possible target positions. (elsevierpure.com)
The peripheral sensitivity profile at the saccade target reshapes during saccade preparation, Cortex, 139, 12-26. (hu-berlin.de)

Compared with the condition where all positions were rewarded with a smaller amount, the mean saccade latency in the asymmetrical reward schedule was significantly shorter when the saccade was made toward the position associated with reward than when it was directed to no-reward positions. (elsevierpure.com)

In contrast, the expected lack of reward delayed the initiation of saccades with latencies longer than about 200 ms, irrespective of whether the saccade was made to a position orthogonal or opposite to the reward position. (elsevierpure.com)
For saccades with latencies of more than approximately 240 ms, an additional delay was observed when the saccade was made to a position opposite, as compared to orthogonal, to the reward position. (elsevierpure.com)
Many of us inflated the work requirements by independently transforming reward contingencies regarding saccade response occasion (RT) and attaining accuracy and reliability. (epirubicininhibitor.com)
Improved reward for top Steroid biology achieve accuracy decreased the probability of quickly saccades but remaining their latency unchanged. (epirubicininhibitor.com)

We also implemented a hand reaction time (RT) task in response to a visual signal. (emfacts.com)
Together, the results explicate parallel representations, hierarchical transformations, and functional associations of visual and saccade-related signals at a key juncture in the 'where' pathway. (elifesciences.org)
however, in tasks like reading, visual search, and scene perception, covert attention and overt attention (the exact eye location) are tightly linked. (scholarpedia.org)
At one time, researchers believed that the eyes and the mind were not tightly linked during information processing tasks like reading, visual search, and scene perception. (scholarpedia.org)

PDs were slower to learn the first cue-saccade association presented, but did not show increased error or reaction time switch costs when switching between two rules within blocks. (lincoln.ac.uk)

RESULTS: With the exception of VGS and MGS latencies, the parameters of VGS, GAP and MGS tasks were unchanged before and after real or sham EMF exposure. (emfacts.com)

Under these conditions patients were impaired in terms of response latencies and number of errors. (lincoln.ac.uk)
The findings are consistent with a role for the nigrostriatal dopamine system in the reinforcement of saccade-response-outcome associations. (lincoln.ac.uk)
Presentation time of the Muller-Lyer illusion, not response delay or saccade latency, was the major factor in determining the size of the illusion effect. (ru.nl)

In all conditions PDs showed multi-stepping/hypometria of saccades consistent with a motoric deficit in executing actions based on cognitive cues. (lincoln.ac.uk)
Intact performance of PDs when associations are not stochastically reinforced suggests that striatal learning systems are complemented by cognitive representations of task rules which are unaffected in the early stages of PD. (lincoln.ac.uk)
It sheds light on the cognitive processing that takes place during the execution of a given task. (eyeware.tech)

We also examine effects of viewing task on when and where the eyes move in real-world scenes: participants engaged in a memorization and an aesthetic judgment task while viewing 100 scenes. (frontiersin.org)

While we find no difference at the mean-level between the two tasks, temporal- and distribution-level analyses reveal significant task-driven differences in eye movement behavior. (frontiersin.org)

For a long time, it was believed that saccades and smooth pursuit were controlled by independent functional and anatomic systems in the brain ( Robinson, 1986 ). (eneuro.org)

When significant position error (PE) is accumulated, a catch-up saccade may be triggered to re-foveate the target. (eneuro.org)

in our data, this resulted in longer saccade trigger times and more smooth trials without saccades. (eneuro.org)

The submission in the saccade RTs revealed 2 kinds of vision actions rapidly saccades along with short RTs, as well as non-reflex saccade using lengthier RTs. (epirubicininhibitor.com)
Due to the extreme speed of saccades, vision is suppressed. (eyeware.tech)

The mechanism by which the brain decides when to trigger discrete catch-up saccades during continuous smooth pursuit has eluded researchers for decades. (eneuro.org)

Visuomotor actions, such as saccades, depend on the dorsal "action'' pathway that is largely immune to illusions. (ru.nl)

Likewise, saccades and their properties were thought to be strictly governed by position inputs ( Wurtz and Optican, 1994 ). (eneuro.org)

In summary, our data supports our hypothesized predicted error-based decision process for coordinating saccades during smooth pursuit. (eneuro.org)

SIGNIFICANCE: This is the first study to investigate saccade performance in relation to mobile phone exposure. (emfacts.com)
We report the performance of patients with idiopathic Parkinsons disease (PDs) in a test which required learning and switching between arbitrary cue-saccade rules. (lincoln.ac.uk)

Effects of thirty-minute mobile phone exposure on saccades. (emfacts.com)
OBJECTIVE: To investigate whether exposure to pulsed high-frequency electromagnetic field (pulsed EMF) emitted by a mobile phone has short-term effects on saccade performances. (emfacts.com)

A generative learning model for saccade adaptation. (hu-berlin.de)

On average, the two saccade RTs and reach error diverse systematically using incentive condition, with attain precision enhancing once the saccade has been delayed. (epirubicininhibitor.com)

CONCLUSIONS: Thirty minutes of mobile phone exposure has no significant short-term effect on saccade performances. (emfacts.com)

Intriguingly, the time course of saccade-related activity in CIP aligned with the temporally integrated V3A output. (elifesciences.org)

Measure a person's ability to fixate on a moving object using smooth-pursuit tasks. (tobii.com)

In addition, the latencies of VGS and MGS did not change differently after real and sham exposure. (emfacts.com)

Many of us right here show just how much stare anchoring is actually flexibly modulated with the prize contingencies of saccade latency and also reach exactness. (epirubicininhibitor.com)

An adaptive algorithm for fast and reliable online saccade detection. (hu-berlin.de)

Making flexible associations between what we see and what we do is important for many everyday tasks. (lincoln.ac.uk)

Anatomy17

Organisms4

Diseases8

Chemicals and Drugs2

Analytical, Diagnostic and Therapeutic Techniques and Equipment12

Psychiatry and Psychology32

Phenomena and Processes26

Disciplines and Occupations1

Information Science2

Health Care1

Visually guided saccade2

Properties of saccades2

Mean fixation duration1

Fixation12

Reflexive2

Fixations2

Stimuli4

Oculomotor2

Movements8

Perceptual4

Gaze2

Cortical3

Variability3

Vergence10

Velocity1

Occur1

Saccadic2

Sensorimotor4

Peripheral2

Significantly1

Reward4

Visual4

Reaction time1

Parameters1

Response3

Cognitive3

Participants1

Behavior1

Functional1

Target1

Longer1

Vision2

Researchers1

Actions1

Position1

Supports1

Performance2

Effects2

Model1

Average1

Short1

Time course1

Object1

Addition1

Show1

Fast1

Associations1