The ECoG of white Wistar rats was under investigations using method of computer EEG-registration and analysis. The application of the methods of multiple regressive and correlative analysis resulted in creation of mathematical models of ratio between EcoG signals in both hemispheres. In left hemisphere the number of links-connections was three times less in comparison with the right hemisphere. The usage of generally accepted coefficients of interhemispheral asymmetry does not give such a chance for identifiacation differences between left and right hemospheres in rats.
