Influence of vision on adaptive postural responses following standing on an incline

Gammon M. Earhart, Josée M. Henckens, Patricia Carlson-Kuhta, Fay B. Horak

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Previous studies demonstrated a leaning after-effect (LAE) following standing or walking on an inclined surface consistent with a long-lasting, somatosensory memory for body orientation relative to the surface. Here, we asked whether providing a brief visual reference during LAE resets postural orientation to the new visual reference. The results showed that subjects immediately return to upright when eyes were opened briefly during the post-incline period. However, the subjects also immediately resumed leaning after closing their eyes again following 20 s of eyes open. The duration of LAE was not influenced by 1 or 2 brief periods of vision. Also, the amplitude of the lean following the brief vision period was often larger than when subjects had their eyes closed for the entire post-incline period. These results suggest a powerful somatosensory memory contribution to postural orientation in space that is not eliminated or recalibrated with brief exposure to a visual reference.

Original languageEnglish (US)
Pages (from-to)221-226
Number of pages6
JournalExperimental Brain Research
Volume203
Issue number1
DOIs
StatePublished - May 2010

Keywords

  • Adaptation
  • Incline
  • Leaning after-effects
  • Posture
  • Vision

ASJC Scopus subject areas

  • Neuroscience(all)

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