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Related Experiment Videos

Saccade Reorienting Is Facilitated by Pausing the Oculomotor Program.

Antimo Buonocore1, Simran Purokayastha2, Robert D McIntosh2

  • 1Tübingen University.

Journal of Cognitive Neuroscience
|August 19, 2017
PubMed
Summary

New research reveals saccadic inhibition, a brief pause in eye movements, occurs automatically after new visual targets appear. This automatic inhibition facilitates voluntary reorientation, suggesting a crucial role in visual attention and decision-making.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Visual Perception

Background:

  • Visual attention involves selecting targets and managing competing events.
  • Two paradigms, double-step saccades and saccadic inhibition, model reorienting and ignoring new stimuli, respectively.
  • The interplay between reorienting and inhibition remained unexplored.

Purpose of the Study:

  • To investigate the relationship between reorienting eye movements and saccadic inhibition.
  • To determine if saccadic inhibition occurs independently of task instructions.
  • To explore the functional role of saccadic inhibition in visual behavior.

Main Methods:

  • Three experiments were conducted using visual search tasks.
  • Participants performed double-step saccade tasks and experienced saccadic inhibition paradigms.

Related Experiment Videos

  • The effect of an irrelevant flash on reorienting was measured.

    • Main Results:

    • Saccadic inhibition was observed approximately 100 milliseconds after new target onset, irrespective of task instructions.
    • Boosting automatic saccadic inhibition with an irrelevant flash facilitated subsequent reorienting.
    • This suggests saccadic inhibition acts as a bottom-up mechanism.

    Conclusions:

    • Saccadic inhibition is an automatic process crucial for visual behavior.
    • It functions as a 'brake' that allows time for cognitive decision-making.
    • This ubiquitous pause signal supports flexible voluntary action and attention.