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Related Experiment Videos

Visually induced gait deviations during different locomotion speeds.

K Jahn1, M Strupp, E Schneider

  • 1Department of Neurology, Klinikum Grosshadern, Ludwig-Maximilians University, Marchioninistrasse 15, 81377 Munich, Germany. klus.kahn@lrz.uni-muenchen.de

Experimental Brain Research
|November 21, 2001
PubMed
Summary

Distorting optic flow with prisms causes gait deviation towards perceived motion. This visual control of locomotion is speed-dependent, influencing walking more than running.

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Area of Science:

  • Neuroscience
  • Biomechanics
  • Human Physiology

Background:

  • Optic flow is crucial for self-motion perception and path integration during locomotion.
  • Visual cues guide movement and maintain balance.
  • Understanding how visual input affects gait is vital for mobility research.

Purpose of the Study:

  • To investigate the influence of distorted optic flow on gait deviation.
  • To determine if gait adjustments compensate for perceived self-motion errors.
  • To examine the effect of locomotion speed on visually guided gait control.

Main Methods:

  • Ten healthy subjects walked and ran while wearing inverting prisms (15 degrees off vertical) to distort optic flow.
  • Prism orientation created diagonal upward-right or upward-left optic flow.

Related Experiment Videos

  • Gait deviation was measured at different locomotion speeds (walking vs. running).

    • Main Results:

    • A reproducible gait deviation towards the direction of perceived optic flow was observed.
    • Gait deviation was significantly larger during slow walking (approx. 1 m/s) compared to running (approx. 3 m/s).
    • This suggests that visual control of locomotion is more influential at slower speeds.

    Conclusions:

    • Locomotion speed modulates the reliance on visual feedback for gait control.
    • Walking relies more on visual control and optic flow-induced vection than running.
    • Spinal programs may dominate path integration during faster locomotion like running.