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Anterior-Posterior Balance Perturbation Protocol Using Lifelike Virtual Reality Environment.

Gustavo Sandri Heidner1, Patrick M Rider1, J C Mizelle1

  • 1East Carolina University.

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Summary

Virtual reality balance training can effectively perturb postural sway using specific sinusoidal movement parameters. Higher amplitudes and frequencies in virtual reality environments significantly alter balance compared to baseline.

Keywords:
approximate entropyoptical flowpostural controlquiet standing

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Area of Science:

  • Biomechanics
  • Human movement science
  • Virtual reality applications

Background:

  • Virtual reality (VR) is a viable tool for challenging balance and inducing postural sway.
  • A standardized metric for VR balance perturbation is lacking.
  • Current VR interventions require optimization for efficacy, realism, and repeatability.

Purpose of the Study:

  • To investigate the effects of different amplitude and frequency configurations in an anterior-posterior translation VR environment on balance.
  • To identify specific VR movement parameters that effectively perturb balance.

Main Methods:

  • Thirteen healthy young adults participated.
  • Balance was challenged using anterior-posterior sinusoidal movements within a VR environment.
  • Tested amplitudes: 1, 5, 10, 20 cm; frequencies: 0.5, 0.25 Hz.

Main Results:

  • Mean center of pressure velocity increased significantly at 0.5 Hz with 10 and 20 cm amplitudes.
  • Mean center of pressure approximate entropy increased significantly at 0.5 Hz with 20 cm amplitude.
  • Specific sinusoidal movement parameters altered balance compared to quiet standing.

Conclusions:

  • Realistic VR environments can effectively perturb balance.
  • Efficacious balance perturbation in VR depends on specific movement parameters (amplitude and frequency).
  • Further research is needed to standardize VR balance perturbation protocols.