This circuir model, simulate a technique to improve the healing process of bone fractures. Still the doctors don't know exactly what is the body reactions, to generate a fast action in the healing of the pacients. The 3v voltage source and the 10k and 20k Ohms resistors, represent the estimulus signal, and the 100k resistor and the current controled voltage source, represent the cathode introduced inside the body. Refer to Svodoba & Dwarf research.