According to Gurfinkel , there is an internal representation of the body, or postural body scheme, which is not primarily based on sensory information and deals with the body kinematics and kinetics as well as the ori- entation of the body with respect to the vertical. This representation is “used for the perception of body posi- tion and its orientation in space and is also used for mo- tor control, including reactions directed towards main- taining stable body position