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Volitional control of saccadic adaptation.

Frauke Heins1, Annegret Meermeier1,2, Markus Lappe1,2

  • 1Department of Psychology, University of Muenster, Muenster, Germany.

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|January 11, 2019
PubMed
Summary
This summary is machine-generated.

Volitional control can influence saccadic adaptation, a previously assumed automatic process. Participants could inhibit saccade gain changes, demonstrating conscious influence over eye movements.

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Cognitive Psychology

Background:

  • Saccadic adaptation is typically viewed as an unconscious, automatic mechanism.
  • The extent to which volitional control can influence this process remains largely unexplored.

Purpose of the Study:

  • To investigate whether saccadic adaptation can be voluntarily controlled or inhibited.
  • To determine if participants can consciously alter saccade gain adjustments.

Main Methods:

  • The study employed a double-step saccade paradigm to induce post-saccadic error.
  • Participants were instructed either to adapt to the target step or to inhibit saccade amplitude adjustment.
  • Two experiments varied the magnitude of the intra-saccadic target step.

Main Results:

  • Inhibition instructions significantly reduced saccadic adaptation for outward steps (gain change near zero).
  • Some adaptation persisted for inward steps even with inhibition instructions.
  • Saccadic latency was unaffected by instructions for inward steps but increased with inhibition for outward steps.

Conclusions:

  • Volitional control can indeed be exerted over saccadic adaptation.
  • Conscious control appears to modulate target remapping, impacting outward adaptation more significantly.