Delays, Scaling and the Acquisition of Motor Skill

Motion analysis in three dimensions reveals a number of surprising features of the neural control of stick balancing at the fingertip, namely, 1) on‐off intermittency in the controlled variable, and 2) controlling motor forces that exhibit self‐similarity. The growing evidence in support of scaling and critical behaviors in neural motor control necessitates a re‐thinking of how the nervous systems works.