Figure 1. Stick diagrams of the task performed under basic condition (B), equilibrium constraints (K, R) and spatial constraints (S, C).

B: Basic condition. K: Knee-extended condition. R: Reduced base of support condition. S: Imposed straight finger trajectory condition. C: Imposed semicircular trajectory condition. The dark gray and light gray dotted traces depict the CoM and the finger trajectories in the sagittal plane, respectively. The inset box defines the body parts in the stick diagram (Sk, shank; Th, thigh; Pe, pelvis; Tr, trunk; He, head; Hu, humerus; Fo, forearm; Ha, hand).