Rotational and translational optokinetic nystagmus have different kinematics

Jing Tian, David S. Zee, Mark F. Walker

Research output: Contribution to journalArticle

Abstract

We studied the dependence of ocular torsion on eye position during horizontal optokinetic nystagmus (OKN) elicited by random-dot translational motion (tOKN) and prolonged rotation in the light (rOKN). For slow and quick phases, we fit the eye-velocity axis to vertical eye position to determine the tilt angle slope (TAS). The TAS for tOKN was 0.48 for both slow and quick phases, close to what is found during translational motion of the head. The TAS for rOKN was less for both slow (0.11) and quick phases (0.26), close to what is found during rotational motion of the head. Our findings are consistent with the notion that translational and rotational optic flow are processed differently by the brain and that they produce different 3-D eye movement commands that are comparable to the different commands generated in response to vestibular signals when the head is actually translating or rotating.

Original languageEnglish (US)
Pages (from-to)1003-1010
Number of pages8
JournalVision Research
Volume47
Issue number7
DOIs
StatePublished - Mar 1 2007

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Keywords

  • Listing's Law
  • Macaque
  • Nystagmus
  • Torsion

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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