ANALYSIS OF POWER SPECTRA AND COHERENCE FUNCTIONS OF BIOPOTENTIALS DURING FORMATION OF POSTURE DOMINANT

Abstract

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 were computer analyzed. The formation of the dominant was accompanied by a general rearrangement of the whole neocortex electrical activity; the power of .delta.-frequency and the level of the coherence between biopotentials within the same range increased. After turning off of the DC no change of the biopotentials'' rearrangement was noticed; in some rabbits a small rise in the power spectrum and an increase in the coherence function was noticed within the .beta.-range.