The balance perception changes by motor learning with active trunk movements

This paper investigates that the motor learning has an influence on the human perception, focusing on an upright balance. In order to apply some disturbances, we have constructed a special stool which moves horizontally as well as rotates around the roll direction. This stool allows us to provide two different conditions for the motor learning phase in whether an active trunk movements for balance maintenance is required or not. The comparison of the balance perception tests before and after the motor learning phase indicates that balance perception, i.e., the subjective upright posture, has changed if the subjects have repeated trunk movements during the motor learning phase.