Fig. 9

Example of an experiment: a camera image during the experiment, b a graph created from the saved CSV file. The system’s angle (α6) increases by 3° left tilt perturbation (A); 5° left tilt perturbation (B); and 8° left tilt perturbation (C). All perturbations are followed by a balance recovery reaction (angle α1 and α2) that was detected by the software, the EPES system returns to its initial horizontal condition as clearly seen (α6). There is a clear gradation in the participant balance recovery response based on the size of the disturbance