Sentences with word «saccade»

Around the time of saccade onset (± 100 ms), the activity displays distinct modulations.

This movement - field plot shows that the number of spikes in the burst (color code) varies systematically with saccade amplitude and direction.

For central saccades (C), the p values from left to right are: 5.5e - 13; 0.0164, 0.0001, 0, 0, 0.0001, 0.0001, 0, 0, 0.0502, 0, 0.497, 0.0012, 0.0827, 0.958, 0.0126, 0.0004; 0.0163.

For peripheral saccades (D), the p values from left to right are: 5.5e - 7; 0.734, 0.0049, 0.0046, 0, 0, 0, 0.0001, 0.0174, 0.0001, 0, 0, 0, 0, 0, 0, 0; 8.49e - 28.

Note that the spike counts are remarkably constant across the rostral - to - caudal extent of the SC as cells at each location fire on average about 18 spikes for their preferred saccade.

Moving your eyes smoothly enough to trace out words is hard because your eyes constantly make jerky motions known as saccades, unless you are tracking a moving object.

If LIP activity strictly reflected a broad timing system (like those described by centralized timing models), its activity would have a consistent relationship with time irrespective of saccade direction.

Conversely, a poor fit would suggest that activity aligned to a particular saccade can not solely account for the observed neural activity.

Overall correlations were significant for precentral and postperipheral saccade aligned activity and increased from 0.050 and 0.076 to 0.145 and 0.157, respectively.

Although the predominant feature of activity modulation during self - timed saccades is a near linear decline in firing rate over time, other modulations are clearly present.

He said: «Examining saccades from different populations is revealing a lot about underlying brain mechanisms and how we think.

Twenty - seven percent of Chinese participants responded with high proportions of express saccades, similar to 22 % of the British Chinese, but many more than the 10 % of white British participants.

(E) Average memory - guided delayed - saccade activity for the same example cell shown in (C).

Black points in (D) correspond to correlations observed during the memory - guided saccade task.

The data thus indicate an almost two-fold decrease in firing rates from small to large saccades within the oculomotor range.

Cells were selected for having at least five saccades into the center of their movement field (within 0.5 ⋅ σmf).

These peri-saccadic modulations in activity are similar between saccade directions and are consistent with previous studies as being signals of a global remapping of the RF [45]--[48].

Functional MRI mapping of brain activation during visually guided saccades and antisaccades: cortical and subcortical networks.

The 800 ms intervals were investigated as that is the minimum time for correctly made saccades as defined by the error window (1,000 ms ± 200 ms).

For example, Reingold and Rayner [53] found that a reduced contrast leads to longer fixation times for a critical word — amounting to an increase of first fixation times by 60 ms and of gaze duration (i.e. the sum of all fixations on the critical word before the first saccade to another word) by 120 ms.. This result was replicated in a subsequent study [54], which further showed that a reduced contrast leads to a lower probability of word skipping.

Therefore, LIP activity is likely related to motor planning rather than saccade metrics.

At the same time, everted laryngeal saccades can be removed.

Sommer says future experiments may inactivate more of the thalamus to see if monkeys have a harder time distinguishing their own saccades from changes in their environment.

Researchers had already observed that brain cells in this region seem to anticipate where the eye's center of focus will move to after an impending saccade, making it a reasonable place for corollary discharges to end up.

By recording neuronal activity in monkeys as they performed tasks that caused saccades, Dr. Christopher Pack has shown that there are waves of activity that cross specific vision processing areas of the brain in defined patterns, and that these patterns are reorganized by saccadic eye movements.

You can become aware of, and even control, these large movements of the eyes, which scientists call saccades.

, real rat laughter doesn't tend to sound very much like the human variety, which normally involves pulsating sound bursts starting with a vocalized inhalation and consisting of a series of short distinct saccades separated by almost equal time intervals.

Subjects were tested for their rapid eye movement that allows focus to shift on multiple objects in the field of vision (aka saccade) and ability to follow objects moving across the visual field, known as smooth - pursuit.

«Our research has shown that this can not be the case, at least for saccade behaviour.

«If these deficits do turn out to be a consistent finding in a sub-group of children with ASD, this raises the possibility that saccade adaptation measures may have utility as a method that will allow early detection of this disorder.»

«These finding suggest that assessing the ability of people to adapt saccade amplitudes is one way to determine whether this function of the cerebellum is altered in ASD,» said Edward Freedman, Ph.D. an associate professor in the URMC Department of Neuroscience and co-author of the study.

But there has been extensive work showing that people with schizophrenia do indeed have abnormal saccades, the fast eye movements that direct our gaze from object to object as we explore a visual scene.

Yet correlations were not significant for either saccade alignment as animals fixated on the central target in the high modulation cells.

First and last bins (C, D) display correlation of the 800 ms of the interval («All», − 800 to 0 ms, or 0 to 800 ms) about saccade onset.

These examples thus suggest that the shape parameters of the burst depend systematically on the actual saccade to which the neuron contributes, rather than on its topographic location in the motor map.

The results of saccadic function were available for 64 children of whom 62 had accurate saccades, with one child demonstrating an undershoot, and one with an overshoot of the saccadic endpoint.