Fig. 1

Trajectories of patient 2. Condition for the task movement: the target button 30 cm away from the start button in the sagittal and vertical directions. The vertical axis expresses height and the horizontal axis expresses forward length; each box is a square with sides 40 cm long. The start button is located at the bottom left, and the target button is located towards the upper right. The trajectory is shown as a standardized thick line. Compared with the task before intervention (a), the trajectory of the wrist after intervention raised smoothly (b), although it was slightly above the target. At the same time, the trajectory of the shoulder after intervention (d) was shortened in the direction of the horizontal axis compared with the shape before intervention (c)