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Related Experiment Videos

Spatial attention during saccade decisions.

Donatas Jonikaitis1, Anna Klapetek2,3, Heiner Deubel2

  • 1Department of Neurobiology and Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California.

Journal of Neurophysiology
|March 31, 2017
PubMed
Summary
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Decision-making in eye movements (saccades) can be tracked by measuring spatial attention before the action. This reveals how the brain competes between potential targets, influencing visual sensitivity.

Area of Science:

  • Cognitive Neuroscience
  • Oculomotor Systems
  • Decision Making

Background:

  • Traditional decision-making studies rely on observable outcomes.
  • Oculomotor (eye movement) and sensory selection are intrinsically linked.
  • Understanding decision processes before motor responses is crucial.

Purpose of the Study:

  • To track oculomotor decision-making by linking it to sensory selection before eye movements occur.
  • To investigate how visual sensitivity changes at saccade target locations during decision-making.
  • To explore the temporal dynamics of decision competition and its relation to saccade latency and accuracy.

Main Methods:

  • Participants performed saccadic eye movements to one of two memorized targets.
  • Visual sensitivity was measured at both chosen and non-chosen saccade target locations.
Keywords:
decision makingsaccadesspatial attentionworking memory

Related Experiment Videos

  • The time course of visual sensitivity changes was analyzed in relation to saccadic latency and error trials.

    • Main Results:

    • Visual sensitivity increased at both target locations, biased towards the chosen target.
    • Decision competition resolved faster for shorter-latency saccades and was heightened in error trials.
    • Oculomotor selection and visual sensitivity were modulated by top-down, bottom-up factors, selection history, and predicted saccade direction.

    Conclusions:

    • Saccade decisions have direct, measurable visual consequences.
    • Decision-making processes in the oculomotor system can be identified before overt choices.
    • Decision-making, saccade target selection, and visual sensitivity are strongly interconnected, mediated by spatial attention.