An Approach for Simulation of the Muscle Force Modeling It by Summation of Motor Unit Contraction Forces
Figure 5
An example of stimulation applied to MUs respecting the size principle. (a) Patterns applied to the MUs, presented as dots in the time scale, each row corresponds to one MU, and patterns for each MU are different (randomly generated with different mean IPIs, from 16.2 ms to 40.90 ms, depending on the contraction time of the respective MU; for group of MUs mean IPI is 30.53 ms; for group of FR MUs mean IPI is 19.22 ms; for group of FF MUs mean IPI is 18.68 ms); (b) the calculated forces of the whole muscle (black) and of the three groups of MUs: FF (green), FR (blue), and (red), for the respective impulsation patterns given in (a); (c) forces calculated for one of the slow MUs (mean IPI = 25.1 ms); (d) force calculated for one of the FR MUs (mean IPI = 16.7 ms); (e) force calculated for one of the FF MUs (mean IPI = 23.33 ms). Note that the force scales are different.
