[Analysis of the power spectra and coherence functions of neocortical biopotentials during formation of a posture dominant].

The computer analysis was given to simultaneous records of the electrical activity of the premotor, motor, parietal and visual areas of the right and the left hemispheres during the creation of the posture dominant through polarization of the premotor area of the right cerebral hemisphere of a rabbit. The formation of the dominant was accompanied by a general rearrangement of the whole neocortex electrical activity toward an increase in the power of delta-frequency and the rise of the level of the coherence between biopotentials within the same range. After switching off of the direct current, the same form of biopotentials' rearrangement pertained, as during the current action; in some rabbits a small rise in the power spectrum as well as an increase in the coherence function was also noticed within the beta-range.