Effects of support surface stability on feedback control of trunk posture

Georgia Andreopoulou, Erwin Maaswinkel, L Eduardo Cofré Lizama, Jaap H van Dieën*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

This study aimed to examine the interactions of visual, vestibular, proprioceptive, and tactile sensory manipulations and sitting on either a stable or an unstable surface on mediolateral (ML) trunk sway. Fifteen individuals were measured. In each trial, subjects sat as quiet as possible, on a stable or unstable surface, with or without each of four sensory manipulations: visual (eyes open/closed), vestibular (left and right galvanic vestibular stimulation alternating at 0.25 Hz), proprioceptive (left and right paraspinal muscle vibration alternating at 0.25 Hz), and tactile (minimal finger contact with object moving in the frontal plane at 0.25 Hz). The root mean square (RMS) and the power at 0.25 Hz (P25) of the ML trunk acceleration were the dependent variables. The latter was analyzed only for the rhythmic sensory manipulations and the reference condition. RMS was always significantly larger on the unstable than the stable surface. Closing the eyes caused a significant increase in RMS, more so on the unstable surface. Vestibular stimulation significantly increased RMS and P25 and more so on the unstable surface. Main effects of the proprioceptive manipulation were significant, but the interactions with surface condition were not. Finally, also tactile manipulation increased RMS and P25, but did not interact with surface condition. Sensory information in feedback control of trunk posture appears to be reweighted depending on stability of the environment. The absolute effects of visual and vestibular manipulations increase on an unstable surface, suggesting a relative decrease in the weights of proprioceptive and tactile information.

Original languageEnglish
Pages (from-to)1079-87
Number of pages9
JournalExperimental Brain Research
Volume233
Issue number4
Early online date24 Dec 2014
DOIs
Publication statusE-pub ahead of print - 24 Dec 2014

Keywords / Materials (for Non-textual outputs)

  • Adult
  • Analysis of Variance
  • Feedback, Sensory/physiology
  • Female
  • Humans
  • Male
  • Photic Stimulation
  • Postural Balance/physiology
  • Posture/physiology
  • Proprioception/physiology
  • Psychophysics
  • Time Factors
  • Torso/innervation
  • Touch/physiology
  • Vestibule, Labyrinth/innervation
  • Vibration
  • Young Adult

Fingerprint

Dive into the research topics of 'Effects of support surface stability on feedback control of trunk posture'. Together they form a unique fingerprint.

Cite this