The numerical model of the miniature end-plate current MEPC described earlier was systematically analyzed to obtain an optimal set of parameters. This set permits simulating a number of experimental effects: time course of normal MEPC, cholinesterase inhibition, alpha-bungarotoxin action, potential dependence of MEPC, etc. The time course of the simulated "giant" MEPC fitted the experimental data only partially. A good correspondence between the model and experimental data underlies the conclusion that this model reflects well the relative contribution of several processes to MEPC generation.