No Space? No Problem. Accessible Balance Control Using VR Player Movement*

Abstract

Balance assessments are a common method of measuring vestibular and proprioceptive function as well as lower-body strength. Aside from observational clinician analysis of balance exercises, more detailed and conclusive assessments are typically performed using large, nonmobile, and expensive immersive systems. The purpose of this project is to replace existing balance testing equipment and provide an alterable environment for clinical postural control evaluation to enable development of personalized physical rehabilitation methods. To assess and train postural control, balance, and strength, this project incorporated real-time center of pressure data of a user on an on-floor force plate as the user completed a unique balance assessment in a Virtual Reality (VR) environment. Leaning or other movements altering the center of pressure location correspondingly caused movement through the VR environment. The VR environment was designed to assist ankle injury rehabilitation and included tasks to evaluate and compare mobility of the ankles. Quantitative measurements of 2-dimensional range of motion were coded to be recorded and coupled with clinician observational analysis for physical therapy applications. Lag between the force plate and VR device was minimal to prevent motion-sickness, and users could navigate through the VR environment, including tight areas, using planted sway movements with ease. This project developed novel physical rehabilitation methods using quantitative postural control analysis and can be further expanded upon to improve numerous physiological or vestibular conditions.