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Tracking with the mind's eye.

R J Krauzlis1, L S Stone

  • 1Salk Institute for Biological Studies, La Jolla, CA 92037, USA.

Trends in Neurosciences
|November 5, 1999
PubMed
Summary
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Voluntary tracking eye movements, pursuit and saccades, are guided by perception, not just raw visual input. This suggests a unified strategy for eye movements during object tracking.

Area of Science:

  • Neuroscience
  • Oculomotor Systems
  • Visual Perception

Background:

  • Eye movements, including pursuit and saccades, were traditionally considered independent systems.
  • Saccades are known to be influenced by perception and cognition.
  • Recent evidence suggests pursuit eye movements are also guided by higher-order visual processing.

Purpose of the Study:

  • To investigate the role of perceptual and cognitive processes in guiding pursuit eye movements.
  • To explore the relationship between pursuit and saccade systems.
  • To understand how these eye movements are coordinated during object tracking.

Main Methods:

  • Review of psychophysical and physiological studies.
  • Analysis of neural mechanisms underlying eye movements.
Keywords:
NASA Center ARCNASA Discipline Neuroscience

Related Experiment Videos

  • Examination of visual information processing for object tracking.

    • Main Results:

    • Compelling evidence indicates pursuit eye movements are guided by higher-order visual processes.
    • Pursuit and saccade systems share overlapping neural mechanisms.
    • This overlap suggests a coordinated control strategy for tracking visual objects.

    Conclusions:

    • Both pursuit and saccades are guided by perception, not solely raw visual stimuli.
    • Shared neural pathways facilitate the coordination of pursuit and saccades.
    • Perceptual guidance ensures unified motor control for tracking ambiguous objects.