Foveal visual strategy during self-motion is independent of spatial attention

Research output: Contribution to journalArticle

Abstract

Translational self-motion disturbs the stability of retinal images by inducing a pattern of retinal optic flow that cannot be compensated globally by a single eye movement. The eyes must rotate by different amounts, depending on which spatial location needs to be stabilized on the retina. However, compensatory eye movements during steady fixation are always such as to maintain visual acuity on the fovea at the expense of significant image slip on the peripheral retina. We investigated whether such a foveal visual strategy during translation is hard-wired or whether it embeds enough flexibility to also allow for behaviorally relevant objects outside the foveae to be stabilized preferentially on the retinas. Monkeys were moved forward or backward and leftward or rightward passively in darkness while planning a saccade or bar release to peripheral dimmed targets. By comparing the eye movements made during these tasks with those under conditions of steady fixation, we found that the motion-induced eye movements depended only on current fixation. This was true even during the last milliseconds just before a saccade to the peripheral target. We conclude that the foveal stabilization strategy is invariant and solely dependent on current eye position, a strategy that is optimal for both processing speed and efficiency in the extraction of heading information from retinal flow during self-motion.

Original languageEnglish (US)
Pages (from-to)564-572
Number of pages9
JournalJournal of Neuroscience
Volume26
Issue number2
DOIs
StatePublished - Jan 11 2006

Keywords

  • Eye movement
  • Foveal strategy
  • Self-motion
  • Spatial attention
  • Vergence angle
  • Vestibulo-ocular reflex

ASJC Scopus subject areas

  • Neuroscience(all)

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