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Related Experiment Video

Updated: Jan 4, 2026

Experimental Methods to Study Human Postural Control

Experimental Methods to Study Human Postural Control

Published on: September 11, 2019

Virtual-Reality-Induced Visual Perturbations Impact Postural Control System Behavior.

Harish Chander¹, Sachini N K Kodithuwakku Arachchige¹, Christopher M Hill²

¹Neuromechanics Laboratory, Department of Kinesiology, Mississippi State University, Mississippi State, MS 39762, USA.

Behavioral Sciences (Basel, Switzerland)

|November 14, 2019

Summary

This summary is machine-generated.

Virtual reality (VR) training can improve postural stability. Anticipating visual perturbations in VR significantly enhances balance control compared to unexpected ones, suggesting VR

Keywords:

postural control postural stability behavior virtual reality visual perturbations

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Area of Science:

Biomechanics
Human motor control
Rehabilitation technology

Background:

Virtual reality (VR) is increasingly utilized in rehabilitation, particularly for enhancing postural stability.
The specific effects of VR-induced visual perturbations, with and without anticipation, on postural control remain underexplored.

Purpose of the Study:

To investigate the impact of anticipated versus unexpected visual perturbations using a moving wall paradigm in VR on postural stability.
To determine if VR can modulate postural responses through controlled visual feedback.

Main Methods:

Nineteen healthy participants underwent static balance tests on a force plate under three conditions: baseline, unexpected VR perturbation, and expected VR perturbation.
Analysis focused on center of pressure (COP) displacement, 95% ellipsoid area, and COP sway velocity using repeated-measures ANOVA.

Main Results:

Expected VR perturbations resulted in significantly lower COP displacement and 95% ellipsoid area compared to unexpected perturbations (p < 0.05).
Sway velocity was significantly higher in the expected perturbation condition than in the unexpected condition (p < 0.05).

Conclusions:

Unexpected visual perturbations in VR destabilized posture, likely due to conflicting sensory information and compensatory responses.
Anticipated visual perturbations led to reduced sway displacement and area by increasing sway velocity, indicating anticipatory postural adjustments.
VR serves as a versatile, cost-effective tool for training postural stability by manipulating visual feedback to elicit specific postural responses.