Fig 6 -

For the three grid configurations of increasing electrode density (in columns) and for both contractions up to 30% MVC (first row: A, B, C) and 50% MVC (second row: D, E), validation against the experimental normalized force trace (solid dark trace) of the normalized effective neural drive to muscle estimated from the completely reconstructed population of N = 400 MUs (solid red traces) and from the experimental samples of Nr identified MUs (dotted blue traces). The TA force FTA(t) (Fig 5) was estimated from the recorded ankle torque T with Eq 4. The histogram distributions of the identified MUs across the recruitment range Tth in %MVC were normalized to the number of MUs identified experimentally.