Vestibular perceptual learning improves self-motion perception, posture, and gait in older adults

Abstract Vestibular motion perception declines with age, increasing the risk of falling substantially. We performed a two-week perceptual learning intervention using a self-motion direction discrimination task (2800 training trials per person) on a 6DOF motion platform in healthy older adults (n=40, aged 70-88yr). Linear inter-aural and angular roll tilt vestibular thresholds improved with training (95\% credible interval for pre/post difference), suggesting altered sensitivity post-training. Moreover, improved perceptual abilities transfer to actual posture (reduced sway) and gait parameters. Passive self-motion discrimination training provides a new and promising way to counteract age-related sensory decline. It can reduce the risk of falling, and thereby maintain individual autonomy and quality of life.