The model with the parameters τ and q that best fit the empirical data could capture the variability in the group mean RA and cocontraction with R2 = 0.87. (a) The group mean trajectories for the point-to-point targets from the data (solid trace) and the simulation (dashed trace) are shown. The time-series of the RA and the cocontraction from the data and the simulation resembled one another. (b) The group mean trajectories from the via-point reaching task from the data and the simulation are plotted. The time-series of the RA and the cocontraction from the simulation resembled the participants’ behavior.