In these experiments, normal subjects and patients with balance problems stand on a platform that rotates either sinusoidally or unpredictably. They are asked to either keep their body en bloc (EB), so that their legs, trunk and head move with the platform, or to keep their head and trunk stable in space while the floor rotates (HAT Stable). Controls system models are used to characterize the frequency response of the ankle, hip and neck joints under these conditions. Go to the Video Clips section for videos of these different paradigms.

One related project is to develop a visualization tool to take the actual body segment velocities and model responses, and render these in a 3D animated representation.

Go to future studies...