Up-down asymmetry in vertical induced motion.

  title={Up-down asymmetry in vertical induced motion.},
  author={Lori A Lott and Robert B. Post},
  volume={22 5},
Induced motion (IM) is the illusory movement of an object in the direction opposite to the real motion of adjacent detail. One theory of IM suggests that it results, in part, from suppression of optokinetic nystagmus (OKN) by fixational (smooth-pursuit) effort. In several studies an asymmetry in human vertical OKN has been reported, with upward optokinetic stimulation eliciting higher OKN gain than downward motion. This provides a test of the nystagmus-suppression theory of IM. If suppression… CONTINUE READING