Figure 2

Movement trajectories at the ankle joint in voluntary dorsi-flexion. Movement trajectories of ankle angular position (top), velocity (middle) and acceleration (bottom) of a typical participant at baseline during the voluntary movement task from full plantar-flexion (PF) to full dorsi-flexion (DF). AROM = full active range of motion; 1stMU = First movement unit; AROM_1stMU = AROM between the onset and 1stMU; %AROM_1stMU = percentage of AROM_1stMU compared to full AROM; V_P = maximum velocity peak; A_P = maximum acceleration peak.