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  • PPRF
  • It probably results from a dysfunction of brainstem ocular motor structures, in particular the paramedian pontine reticular formation (PPRF) involved in saccade generation: excitatory burst neurons (EBN), inhibitory burst neurons (IBN) and omnipause neurons (OPN). (biomedcentral.com)
  • gaze
  • To this end, we adapted a gaze correction paradigm in which a saccade was executed toward either a previously fixated or a novel target. (springer.com)
  • During the saccade, the stimuli were displaced such that the participant's gaze landed between the target stimulus and a distractor. (springer.com)
  • We apply this new control policy to eye-head coordination in two-dimensions, specifically head-unrestrained gaze saccades. (springer.com)
  • Paradoxically, the hierarchical structure has controllers for the gaze and the head, but not for the eye (the most distal part). (springer.com)
  • Our simulations demonstrate that the proposed control structure reproduces much of the published empirical data about gaze movements, e.g., it compensates for perturbations, accurately reaches goals for gaze and head from arbitrary initial positions, simulates the nine relationships of the head-unrestrained main sequence, and reproduces observations from lesion and single-unit recording experiments. (springer.com)
  • Human eye-head gaze shifts preserve their accuracy and spatiotemporal trajectory profiles despite long-duration torque perturbations that assist or oppose head motion. (springer.com)
  • I've shifted my gaze using a head movement and no-eye movement. (coursera.org)
  • the eye and tells us as they maintain their gaze X, Y, or Z. (coursera.org)
  • To direct gaze toward a visual target, for example, the visuomotor system depends upon precise sensorimotor transformations in the midbrain superior colliculus (SC) and then to premotor and motor nuclei controlling eye and skeletal muscles ( Gandhi and Katnani, 2011 ). (jneurosci.org)
  • exhibit
  • Research at Liverpool, however, has shown that within the Chinese population there are a high proportion of healthy people that exhibit a pattern of eye movements previously thought to be rare in the absence of injury or disease. (healthcanal.com)
  • presaccadic
  • In two follow-up experiments, we showed that presaccadic spatial and object (surface feature) information can contribute separately to the execution of a corrective saccade, as well as in conjunction. (springer.com)
  • therefore, presaccadic acquisition of object information may be particularly useful for distinguishing retinal displacement from object displacement after a saccade. (springer.com)
  • voluntary
  • These voluntary eye movements are called saccades. (clinicaltrials.gov)
  • These effects were robust as early as 60 ms after the eye movement was cued, much faster than the voluntary deployment of covert attention (without eye movements), which takes ∼300 ms. Our results link the dynamics of saccade preparation, visual performance, and subjective experience and show that upcoming eye movements alter visual processing by increasing the signal strength. (jneurosci.org)
  • This was the first evidence that internal models do not anticipate the mechanically induced change of the visual stimulus but are updated in anticipation of voluntary eye movements. (frontiersin.org)
  • evidence
  • Our data on eye movement positions provide novel evidence of parallel programming of saccades during scene viewing. (arvojournals.org)
  • Eye-head coordination in monkeys: evidence for centrally patterned organization. (springer.com)
  • Similarly, evidence that movement preparation alters subjective experience would imply that it modifies sensory processing to create a perceptual experience that integrates visual signals and behavioral priority. (jneurosci.org)
  • paradigm
  • Although previous research has investigated the characteristics of this PRL, it is unclear whether eye movement metrics are modulated by peripheral viewing with a PRL as measured during a visual search paradigm. (frontiersin.org)
  • binocular
  • Montreal Cognitive Assessment (MoCA): 24.0 ± 4.and age-matched controls were analyzed using EyeBrain T2, a head-mounted binocular eye tracker. (frontiersin.org)
  • perception
  • Here we assess concurrent changes in visual performance and perceived contrast before saccades, and show that saccade preparation enhances perception rapidly, altering early visual processing in a manner akin to increasing the physical contrast of the visual input. (jneurosci.org)
  • Changes in visual perception at the time of saccades. (dur.ac.uk)
  • signals
  • Consequently, it has been proposed that signals emerging from saccade-related brain areas provide feedback to visual cortex to change the gain of responses to visual input ( Hamker, 2005 ), increasing the signal strength as if stimulus saliency itself were increased. (jneurosci.org)
  • reveal
  • Reaching movements may reveal the distorted topography of spatial representations after neglect. (dur.ac.uk)
  • 1 , 8 , 9 Moreover, prolonged eye movement recordings from any one individual often reveal the expression of more than one waveform type. (arvojournals.org)
  • 1979
  • Although the eyes move serially from one location to the next during viewing, it has been proposed that underlying saccade plans could be made in parallel (Becker & Jürgens, 1979 ). (arvojournals.org)
  • detect
  • It has been hypothesized that some form of visual search, guided by the surface features in VWM, is used to detect the intended saccade target after the execution of a saccade (Hollingworth et al. (springer.com)
  • In this module, you will learn how the inner ear is designed to detect and respond to head movements. (coursera.org)
  • therefore
  • Therefore, we hypothesized that eye movement measures will show sexually dimorphic results. (frontiersin.org)
  • Therefore, we conducted additional analyses including only those trials in which the first saccade successfully reached the target within a ± 1° window. (frontiersin.org)