Primate memory saccade amplitude after intervened motion depends on target distance

Nuo Li, Min Wei, Dora Angelaki

Research output: Contribution to journalArticle

Abstract

To keep a stable internal representation of the visual world as our eyes, head, and body move around, humans and monkeys must continuously adjust neural maps of visual space using extraretinal sensory or motor cues. When such movements include translation, the amount of body displacement must be weighted differently in the updating of far versus near targets. Using a memory-saccade task, we have investigated whether nonhuman primates can benefit from this geometry when passively moved sideways. We report that monkeys made appropriate memory saccades, taking into account not only the amplitude and nature (rotation vs. translation) of the movement, but also the distance of the memorized target: i.e., the amplitude of memory saccades was larger for near versus far targets. The scaling by viewing distance, however, was less than geometrically required, such that memory saccades consistently undershot near targets. Such a less-than-ideal scaling of memory saccades is reminiscent of the viewing distance-dependent properties of the vestibuloocular reflex. We propose that a similar viewing distance-dependent vestibular signal is used as an extraretinal compensation for the visuomotor consequences of the geometry of motion parallax by scaling both memory saccades and reflexive eye movements during motion through space.

Original languageEnglish (US)
Pages (from-to)722-733
Number of pages12
JournalJournal of Neurophysiology
Volume94
Issue number1
DOIs
StatePublished - Jul 1 2005

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Saccades
Primates
Haplorhini
Vestibulo-Ocular Reflex
Eye Movements
Cues
Head

ASJC Scopus subject areas

  • Physiology
  • Neuroscience(all)

Cite this

Primate memory saccade amplitude after intervened motion depends on target distance. / Li, Nuo; Wei, Min; Angelaki, Dora.

In: Journal of Neurophysiology, Vol. 94, No. 1, 01.07.2005, p. 722-733.

Research output: Contribution to journalArticle

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