Validation against the experimental force trace FTA(t) of the predicted TA force FM(t) at 30% and 50% MVC.

FM(t) was predicted from the spike trains obtained at 4-, 8-, and 12-mm electrode density. FM(t) was estimated from the completely reconstructed population of N = 400 MUs () and from the experimental samples of Nr identified MUs when ‘blind’ () and Tth-informed () distributions of the MU maximum isometric forces were assigned to the MU samples. nRMSE, nRMSEr1, nRMSEp, nRMSEr2 were calculated for the whole contraction, and over the ascending ramp, plateau, and descending ramp, respectively.