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Related Experiment Videos

Does microstimulation evoke fixed-vector saccades by generating their vector or by specifying their goal?

J Schlag1, M Schlag-Rey

  • 1Department of Anatomy, UCLA 90024.

Experimental Brain Research
|January 1, 1987
PubMed
Summary
This summary is machine-generated.

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Electrical stimulation of the monkey

Area of Science:

  • Neuroscience
  • Ophthalmology
  • Motor Control

Background:

  • Electrical stimulation of the monkey's forebrain can evoke fixed-vector saccades.
  • Saccade trajectory is influenced by ongoing eye movements.

Purpose of the Study:

  • To investigate the goal-directed nature of electrically evoked saccades.
  • To differentiate brain sites involved in visual versus motor error processing.

Main Methods:

  • Electrical stimulation at various forebrain sites in monkeys.
  • Application of stimulation during and after spontaneous eye movements.
  • Analysis of saccade trajectories.

Main Results:

  • Stimulation during spontaneous eye movements redirected saccades to a predetermined goal.

Related Experiment Videos

  • The saccade goal was defined based on an eye position sampled before the spontaneous movement.
  • This suggests a goal-directed saccade mechanism operating with a pre-movement reference point.

    • Conclusions:

    • Electrically evoked saccades are goal-directed, not fixed-vector.
    • The brain computes saccade goals relative to a temporally stable reference frame.
    • This paradigm may help distinguish visual (retinal error) from motor (motor error) processing sites.