Sensory Training for Visual Motion Sickness

During training, sensory re-weighting is driven by priming upregulation of somatosensory cues. Two rounds of training, each lasting 15 minutes and block-randomized in sets of 10 trials, are conducted per training visit. In each training trial, participants must determine the direction of gravity and then indicate if the rod being displayed is aligned with gravity or if it needs to rotate clockwise or counterclockwise for that to be so. Participants will be instructed to pay attention to what they feel from their feet, legs, and gut during training and to use that pressure, stretch, movement, and muscle tension feedback to help them sense gravity. Immediate auditory and non-orienting, visual feedback is provided after each trial. A staircase method is used to adapt the level of difficulty based on response accuracy. After two consecutive correct responses, the difficulty increases. After each incorrect response, the difficulty decreases. This process is repeated in each round.