Context-specific adaptation of saccade gain in parabolic flight

Mark J Shelhamer, Richard A. Clendaniel, Dale C. Roberts

Research output: Contribution to journalArticle

Abstract

Previous studies established that vestibular reflexes can have two adapted states (e.g., gains) simultaneously, and that a context cue (e.g., vertical eye position) can switch between the two states. Our earlier work demonstrated this phenomenon of context-specific adaptation for saccadic eye movements: we asked for gain decrease in one context state and gain increase in another context state, and then determined if a change in the context state would invoke switching between the adapted states. Horizontal and vertical eye position and head orientation could serve, to varying degrees, as cues for switching between two different saccade gains. In the present study, we asked whether gravity magnitude could serve as a context cue: saccade adaptation was performed during parabolic flight, which provides alternating levels of gravitoinertial force (0 g and 1.8 g). Results were less robust than those from ground experiments, but established that different saccade magnitudes could be associated with different gravity levels.

Original languageEnglish (US)
Pages (from-to)211-221
Number of pages11
JournalJournal of Vestibular Research: Equilibrium and Orientation
Volume12
Issue number5-6
Publication statusPublished - 2002

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Keywords

  • Context
  • Gravity
  • Human
  • Learning
  • Physiological adaptation
  • Saccades

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Neuroscience(all)

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