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Related Experiment Videos

Object structure and saccade planning.

Dorine Vergilino-Perez1, John M Findlay

  • 1Laboratoire de Psychologie Expérimentale, UMR 8581 CNRS, Université René Descartes, 71 avenue Edouard Vaillant, 92774 Boulogne Billancourt Cedex, France. dorine.vergilino-perez@univ-paris5.fr

Brain Research. Cognitive Brain Research
|July 23, 2004
PubMed
Summary
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When viewing new displays, two saccadic eye movements are often prepared. The study reveals how the brain codes the second saccade based on whether it targets a new object or explores the same object.

Area of Science:

  • Cognitive Neuroscience
  • Oculomotor Research
  • Human Vision

Background:

  • Two saccadic eye movements are frequently prepared together during visual orientation to new displays.
  • Understanding the reference frame for the second saccade is crucial for comprehending visual exploration strategies.

Purpose of the Study:

  • To investigate the reference frame used for the second saccade preparation.
  • To determine if the action on the object influences the coding of the second saccade.

Main Methods:

  • Analysis of the relationship between the landing positions of the first and second saccades.
  • Examination of saccade preparation for targets on new objects versus within the same object.

Main Results:

Related Experiment Videos

  • The action performed on an object influences the coding of the second saccade.
  • Second saccades to new objects are coded for a target position and adjusted based on the first saccade's landing site.
  • Second saccades within the same object are coded as fixed motor vectors, independent of the initial landing position.

    • Conclusions:

    • The brain utilizes distinct coding strategies for second saccades depending on whether the target is a new object or within an existing one.
    • Action-dependent coding of saccades highlights the dynamic and context-specific nature of oculomotor control.