Nov 21, 2013

Express saccades during a countermanding task

BioRxiv : the Preprint Server for Biology
Michael A. McCarthyChristopher F. Clements

Abstract

Express saccades are rapid saccadic eye movements that can accurately redirect gaze to behaviorally relevant stimuli in the visual environment. This behavior can be commonly observed when the fixation spot disappears at a consistent, short interval before a target spot appears at a repeated location. While seemingly automatic, whether cognitive control can govern express saccade production has not been investigated. Here we report the production and manipulation of express saccades under unfavorable conditions in a saccade countermanding task necessitating cognitive control. To perform this task, we trained two monkeys to fixate a central spot and, following a variable amount of time, saccade to a target stimulus at one of two fixed locations (no-stop trials) presented simultaneously with the disappearance of the fixation dot. On a minority of trials, the fixation point reappeared instructing the monkeys to cancel their planned saccade to the peripheral target (stop-signal trials). Monkeys earned fluid reward for generating saccades to targets on no-stop trials and for maintaining fixation on stop-signal trials. Monkeys and humans adapt to the stop-signal trials by increasing saccade latencies. However, in two macaque monkeys w...Continue Reading

  • References
  • Citations

References

  • We're still populating references for this paper, please check back later.
  • References
  • Citations

Citations

  • This paper may not have been cited yet.

Mentioned in this Paper

Heuristics
Protozoa
Mertensophryne micranotis
Aves
Diversion Procedure
Monitoring - Action
Disease Management
Species
Butterflies
Population Group

Related Feeds

BioRxiv & MedRxiv Preprints

BioRxiv and MedRxiv are the preprint servers for biology and health sciences respectively, operated by Cold Spring Harbor Laboratory. Here are the latest preprint articles (which are not peer-reviewed) from BioRxiv and MedRxiv.