[Calculation of the EEG amplitude during differential recording of a potential in a homogeneous unlimited medium]

It is proved by means of numerical simulation, that the potential derived by differential derivation of EEG is well approximated by the potential on spherical surface in unbounded unlimited medium. The supposed imitating formula in comparison with traditional solution within the model of multilayer sphere, much reduces the volume of calculations, being an important pre-condition of on-line analysis of experimental EEG by means of computer.