THE EEG PHENOMENON OF BURSTS OF HIGH-FREQ UENCY SYNCHRONIZED ELECTRICAL-ACTIVITY OF DOGS NEOCORTEX IN THE PROCESS OF ALIMENTARY INSTRUMENTAL-CONDITIONING

The EEG phenomenon was studied of high-frequency bursts (60-70 Hz, 70- 80 mcV) in electrical activity of dog's neocortex (EA, 1-200 Hz) in th e process of instrumental conditioning. These bursts of high-frequency oscillations appeared at the generalization stage of the conditioned reflex during interstimulus intervals at the background of dominant EA of the lower frequency and voltage (10-40 mcV). Application of the de veloped by us novel strategy of the primary analysis of EA realization s (in particular, inhomogeneity coefficient) enabled estimation of the amplitude-frequency EA inhomogeneity, namely, high-frequency bursts. The regional peculiarities of the high-frequency bursts were revealed by means of the original technique based on the expansion of EA oscill ation into a system of half-waves and construction of distribution map s on the basis of their parameters. The presented data verified our ea rlier findings obtained using other techniques (FFT analysis and facto r analysis). These data testify to differential participation of corti cal areas (even those which are close to each other within a distance of 3-5 mm) in the spatio-temporal organization of potentials character istic for a given learning paradigm.