The article is devoted brain activity and its investigation in the psychophysiological school by E.N. Sokolov. The role of novelty neurons in hippocampus and nonspecific neurons of thalamus in an origin of cortical activation processes is shown. Resonance properties of EEG and evoked potentials components in human and animals are revealed. Representation about EEG as a total activity of set of local wave generators is formulated. The new EEG-parameter as activated frequency-selective gamma- and the bеtа-generators displaying activity of pacemaker neurons in local neuron networks, confirming the concept of vector coding the information is allocated.