Influence of vision on adaptive postural responses following standing on an incline
Identifieur interne : 000E48 ( Pmc/Corpus ); précédent : 000E47; suivant : 000E49Influence of vision on adaptive postural responses following standing on an incline
Auteurs : Gammon M. Earhart ; Josée M. Henckens ; Patricia Carlson-Kuhta ; Fay B. HorakSource :
- Experimental brain research. Experimentelle Hirnforschung. Experimentation cerebrale [ 0014-4819 ] ; 2010.
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.
Url:
DOI: 10.1007/s00221-010-2208-4
PubMed: 20336282
PubMed Central: 2872556
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