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Related Experiment Videos

The relationship between vestibulo-ocular reflex plasticity and changes in apparent concomitant motion.

R B Post1, L A Lott

  • 1Department of Psychology, University of California, Davis 95616.

Vision Research
|January 1, 1992
PubMed
Summary

The vestibulo-ocular reflex (VOR) and apparent concomitant motion (ACM) adapt to head movements. Changes in VOR gain and ACM direction show a relationship between motor and perceptual systems.

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Vestibular System

Background:

  • The vestibulo-ocular reflex (VOR) stabilizes gaze during head movements.
  • Apparent concomitant motion (ACM) describes the perceived motion of a visual stimulus during head movements.

Purpose of the Study:

  • To investigate the adaptive changes in VOR and ACM.
  • To explore the relationship between motor adaptation (VOR) and perceptual changes (ACM).

Main Methods:

  • Subjects performed head oscillations at 0.5 or 2.0 Hz for 4 minutes.
  • VOR gain and ACM were measured before and after adaptation.
  • Visual stimulus motion was either in the same or opposite direction as head motion.

Main Results:

Related Experiment Videos

  • Adaptation to correlated head and stimulus motion altered both VOR and ACM.
  • Stimulus motion with head motion decreased VOR gain and increased opposing ACM.
  • Stimulus motion opposite to head motion increased VOR gain and increased same-direction ACM.

Conclusions:

  • Motor and perceptual systems exhibit related adaptive changes.
  • VOR gain appears to be a key factor influencing ACM.