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Related Experiment Videos

Fixation errors and timing in sequences of memory-guided saccades

J Ditterich1, T Eggert, A Straube

  • 1Center for Sensorimotor Research, Department of Neurology, Klinikum Grosshadern, Ludwig-Maximilians-University, Munich, Germany. ditterich@brain.nefo.med.uni-muenchen.de

Behavioural Brain Research
|November 7, 1998
PubMed
Summary

Eye movement sequences can be performed in two modes: one correcting errors using eye position, and another with fixed amplitudes neglecting eye position. This suggests distinct motor control strategies for saccades in darkness.

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Motor Control

Background:

  • Understanding eye movement control is crucial for diagnosing neurological disorders.
  • Saccades are rapid eye movements essential for visual exploration.

Purpose of the Study:

  • To investigate the relationship between position and amplitude errors in sequential saccades.
  • To identify different modes of eye movement performance in complete darkness.

Main Methods:

  • Analysis of saccade sequences to memorized targets in darkness.
  • Observation of fixation times and error propagation between successive saccades.

Main Results:

  • Average compensation for fixation errors was observed.

Related Experiment Videos

  • Groups of saccades exhibited error propagation, linked to fixation durations.
  • Two distinct performance modes were identified: error-correcting and pre-programmed.

    • Conclusions:

    • Eye movement sequences can utilize real-time eye position feedback or operate as pre-programmed units.
    • The findings suggest flexible motor control strategies for saccadic eye movements.