• 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)
  • Typical saccade amplitudes and fixation durations have been described by relatively small-N studies and reviews over the years. (frontiersin.org)
  • To our knowledge, there has not been a large-N examination of the temporal properties of saccades and fixations in scenes. (frontiersin.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)
  • 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)
  • 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)
  • 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)
  • Therefore, we examined the effects of tiagabine on saccade parameters. (uni-muenchen.de)
  • 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)
  • 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)
  • 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)
  • Wagner, AR & Schubert, MC 2020, ' Evidence a shared mechanism mediates ipsi- And contralesional compensatory saccades and gait after unilateral vestibular deafferentation ', Journal of neurophysiology , vol. 123, no. 4, pp. 1486-1495. (johnshopkins.edu)
  • Both areas contained saccade-related activity that predicted the direction/timing of eye movements. (elifesciences.org)
  • Our data reveal CS are recruited at similar latencies without correlation to VOR gain or direction of head rotation, and that the central integration of ipsilesional and contralesional vestibular afference correlates with gait. (johnshopkins.edu)
  • NEW & NOTEWORTHY After unilateral vestibular deafferentation, compensatory saccades (CS) have similar latencies regardless of the direction of head rotation, and those CS generated during contralesional head rotation are unrelated to extent of vestibular loss. (johnshopkins.edu)
  • Amplitude, latency, and SEV were analyzed as a function of treatment and target eccentricity. (uni-muenchen.de)
  • Results: SEV and saccade latency increased with target amplitude. (uni-muenchen.de)
  • 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)
  • 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)
  • 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)
  • 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)
  • Intriguingly, the time course of saccade-related activity in CIP aligned with the temporally integrated V3A output. (elifesciences.org)
  • To elucidate behavioral effects of reward expectation on saccade latency, we employed a visually guided saccade task with asymmetrical reward schedule. (elsevierpure.com)
  • In two monkeys (OZ and OM), we presented the laser light while the monkey made visually guided saccades. (lysylhydroxylase-signal.com)
  • While the monkey fixated a central bright spot on a dark background, we presented a second spot of light and the monkey was rewarded for making a visually guided saccade to that spot once the fixation spot disappeared. (lysylhydroxylase-signal.com)
  • Motor Systems NeuroReport NeuroReport 10, 2665±2670 (1999) THE gain of visually triggered saccades depends on orbital position. (studyres.com)
  • We determined whether internally triggered saccades, e.g. scanning or memory saccades, exhibit the orbital position dependency evident in visually guided saccades. (studyres.com)
  • Instead our results are consistent with the view that cortical output re¯ects the differences evident in the gain of visually triggered centrifugal and centripetal saccades. (studyres.com)
  • Retinotopic Introduction The gain of visually triggered saccades partly depends on the position of the eye at the start of the saccade. (studyres.com)
  • There is increasing evidence that different circuits in the cerebral cortex are responsible for generating externally (visually triggered or re¯exive) saccades and internally triggered saccades [6]. (studyres.com)
  • We observed a topography of saccade direction and amplitude consistent with findings in macaques and humans: small saccades in ventrolateral FEF and large saccades combined with contralateral neck and shoulder movements encoded in dorsomedial FEF. (jneurosci.org)
  • Centrifugal saccades have smaller gains and are slower than centripetal saccades elicited by the same target amplitude. (studyres.com)
  • Internally triggered saccades probably depend more on direct pathways from the frontal or supplementary eye ®elds to the brain stem [6,7,8]. (studyres.com)
  • This behavioural interaction is consistent with reduced competition between reflexive and endogenous saccade plans when S-cone stimuli are employed, while other processes involved in making an antisaccade, such as changing preparatory set or generating an endogenous saccade, are predicted to be equivalent for each kind of stimulus. (ox.ac.uk)
  • Lesions of these areas cause an abnormally large difference in the gains of centrifugal and centripetal saccades [4,5]. (studyres.com)
  • C ) Histogram of latencies at activated (black) and suppressed (gray) sites. (elifesciences.org)