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Related Experiment Videos

Saccadic programming and perceived location

E Wong, A Mack

    Acta Psychologica
    |August 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Eye movements (saccades) are guided by either the perceived or the retinal location of a target. This depends on whether the target

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    Area of Science:

    • Neuroscience
    • Oculomotor control
    • Visual perception

    Background:

    • Understanding oculomotor control is crucial for explaining how the brain directs eye movements.
    • Existing models of oculomotor control are primarily retinotopic or spatiotopic.
    • Investigating saccadic targeting under conditions of visual displacement is key to refining these models.

    Purpose of the Study:

    • To investigate whether saccadic targeting relies on perceived or retinal target location when visual information is displaced.
    • To determine the role of memory in oculomotor control for saccades.
    • To test the validity of existing retinotopic and spatiotopic models of saccadic programming.

    Main Methods:

    • Induced visual displacement to create a discrepancy between a target's retinal and perceived location.

    Related Experiment Videos

  • Programming saccades to the target under conditions requiring memory access versus immediate visual processing.
  • Analyzing eye movement data to determine the saccadic endpoint.

    • Main Results:

    • Saccades were directed to the perceived target location when memory access was required.
    • Saccades were directed to the retinal location when memory access was not required.
    • Findings challenge strictly retinotopic and spatiotopic models of oculomotor control.

    Conclusions:

    • Oculomotor control for saccades is not exclusively retinotopic or spatiotopic.
    • The choice between perceived and retinal location for saccade programming depends on memory requirements.
    • This suggests a flexible system for saccadic targeting that integrates perceptual and spatial information based on memory demands.