SUBSYSTEMS OF THE SPATIOTEMPORAL ORGANIZA TION OF CORTICAL POTENTIALSAND THEIR ROLE IN THE SPATIAL EEG SYNCHRONIZATION

Studying successive topograms of potentials made it possible to reveal different types (subsystems) of the spatio-temporal organization of h uman and animal cortical electrical activity, which covered significan t cortical surface, The dominance of the inversion of the sagittal pot ential gradient in the topograms of the resting state or complicated r elief forms in the active states co-existed with oscillations of the m ean level of topogram potentials, the contribution of which to the spa tial EEG synchronization changed depending on the functional state of the brain, The role of the ratio between these subsystems was shown an d the influence of this ratio was demonstrated on the spatial synchron ization of cortical potentials in experiments with ii rabbits (in the course of their adaptation to the environment and learning) and examin ation of 50 healthy adult subjects (during motor task performance and elaboration of verbal set). The spatial synchronization of cortical po tentials was found to have a complex structure, which was determined b y the ratio between the effects of subsystems of the spatiotemporal or ganization of cortical potentials.