Fig. 2

Representative model fit on the corresponding joint admittance and the resulting model simulation. Plots depict: (A) frequency response function (magnitude at the top, phase at the bottom) of joint admittance from the relaxed test and the simulated joint admittance from the neuromuscular model of an ALS patient; (B) the corresponding recorded wrist angle and wrist torque, as well as the simulations obtained from the model to the deviations above, displayed from 10–20 s