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Sensorimotor integration compensates for visual localization errors during smooth pursuit eye movements.

R J van Beers1, D M Wolpert, P Haggard

  • 1Institute of Cognitive Neuroscience, University College London, London WC1N 3AR, United Kingdom. r.van-beers@ucl.ac.uk

Journal of Neurophysiology
|May 16, 2001
PubMed
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The brain compensates for eye movements to keep visual objects stable. During smooth pursuit, flashes are mislocalized, not static objects, ensuring visual stability.

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Visual Perception

Background:

  • Object localization requires integrating retinal location with gaze direction.
  • Visual stability during smooth pursuit eye movements implies central nervous system (CNS) compensation for eye motion.
  • Systematic localization errors during pursuit offer insights into sensorimotor integration.

Purpose of the Study:

  • To investigate how the CNS localizes static objects during smooth pursuit eye movements.
  • To understand the sensorimotor integration processes underlying visual stability.
  • To identify which visual elements are mislocalized during pursuit and how this relates to gaze direction.

Main Methods:

  • Experiments involved localizing static objects and brief flashes during smooth pursuit eye movements.

Related Experiment Videos

  • Localization accuracy was assessed relative to the direction of gaze and eye movement.
  • Egocentric localization was used to confirm findings regarding mislocalization.

    • Main Results:

    • Static objects are generally well-localized during pursuit, but flashes are mislocalized.
    • Mislocalization errors, particularly for flashes, occurred predominantly in the hemifield ahead of the pursuit target and aligned with eye movement direction.
    • This mislocalization pattern was observed across different pursuit directions and confirmed with egocentric localization.

    Conclusions:

    • The CNS compensates for retinal slip to maintain position constancy of static objects during smooth pursuit.
    • Sensorimotor integration of retinal and gaze signals is crucial for achieving visual stability.
    • Differential processing of static objects versus flashes during pursuit underlies the perceived stability of the visual world.