Trunk velocity-dependent Light Touch reduces postural sway during standing

Autoři: Anirudh Saini aff001;  Devin Burns aff002;  Darian Emmett aff001;  Yun Seong Song aff001
Působiště autorů: Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, Missouri, United States of America aff001;  Department of Psychological Science, Missouri University of Science and Technology, Rolla, Missouri, United States of America aff002
Vyšlo v časopise: PLoS ONE 14(11)
Kategorie: Research Article
doi: 10.1371/journal.pone.0224943


Light Touch (LT) has been shown to reduce postural sway in a wide range of populations. While LT is believed to provide additional sensory information for balance modulation, the nature of this information and its specific effect on balance are yet unclear. In order to better understand LT and to potentially harness its advantages for a practical balance aid, we investigated the effect of LT as provided by a haptic robot. Postural sway during standing balance was reduced when the LT force (~ 1 N) applied to the high back area was dependent on the trunk velocity. Additional information on trunk position, provided through orthogonal vibrations, further reduced the sway position-metric of balance but did not further improve the velocity-metric of balance. Our results suggest that limited and noisy information on trunk velocity encoded in LT is sufficient to influence standing balance.

Klíčová slova:

Balance and falls – Postural control – Robotics – Robots – Statics – Touch – Velocity – Vibration


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