1. A computer-implemented method of outputting information concerning an electrode inserted inside a patient's neural tissue, the method comprising: determining, by a computer processor, a distribution of electrical values, to be generated by the inserted electrode using a first set of settings, over a plurality of positions in the patient's neural tissue in a region surrounding the inserted electrode; determining at least one threshold electrical value for neural tissue activation; determining, by the processor and by applying the at least one threshold electrical value to the electrical values to be generated by the inserted electrode using the first set of settings, an estimated volume of neural tissue activated by the inserted electrode using the first set of settings, wherein the estimated volume of neural tissue indicates that the distribution of the electrical values inside the estimated volume of neural tissue exceed the at least one threshold electrical value and indicates that the distribution of the electrical values beyond the estimated volume of neural tissue fail to exceed the at least one threshold electrical value; and outputting, by the processor, a graphical representation of the determined estimated volume.