A Perturbation Platform System for Balance Testing and Rehabilitation Interventions

Abstract

Background Falling is a leading cause of injury and death in the United States. Researchers and clinicians strive to identify and rehabilitate those at risk of falling in order to mitigate the impact of fall events and prevent future falls. Recently, perturbation-based balance testing and interventions have received increased attention, partly because reactive postural control responses triggered by perturbations are important for balance recovery during actual falls. However, current systems are limited by the need for multiple individuals to operate the device, downtime between trials to reset the perturbation and/or single mode functionality. To this end, we have developed a Perturbation Platform System that can induce perturbations in both vertical and angled directions. Results The system consists of two box platforms that can individually perform straight (25.4 mm, 50.8 mm and 76.2 mm) and angled (5°, 10°, and 15°) height changes while an individual is standing or walking overground. In addition, the system can automatically reset to the original position following perturbation. The platform achieves peak downward accelerations of 5.41 m/s2 during drop events that simulate sudden changes in foot-contact surfaces. Conclusions The novel system can be used in a laboratory setting to better understand balance response and control mechanisms. In addition, this portable system can be used in a clinical or home setting to provide perturbation-based balance exercises that aim to improve balance and mobility.