(A) Relative hit rates of intended and unintended hits (grey) of targets and angles are shown for the targets-of-interest TI, TII, and TIII during the last 5 days of training across subjects for condition I (top), condition II (centre), and condition III (bottom). Note that the hit rates above 100% can be reached for unintended hits when subjects re-entered the target before the trial ended. Colour intensity corresponds to the hit rate. Relative occurrence of direct movement towards TI (orange), that is, only activating motor unit (MU)1 without MU2, and TIII (yellow), that is, only activating MU2 without MU1, during successful attempts (at least angle hits), is shown with respect to the difference in recruitment threshold between MU2 and MU1 (B) and across subjects (C).