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Phase shifts between the rhythmical activity of the hippocampus (CA1), somatosensory, motor and visual areas of the neocortex in the delta-, theta- and alpha-bands were studied during electrostimulation of the mesencephalic reticular formation with different frequencies. It was found that increasing stimulation frequency resulted in nonlinear decrease of(More)
1. During habituation of the animal to the experimental situation there is a gradual decrease in the mean coefficient of correlation between the EEG of different cortical points, accompanied by a decrease in the degree of representation of frequencies of the theta-band in spectral and coherent functions. This process is observed during the first four days(More)
Study of dominating spectral maxima in delta-, theta- and alpha-ranges of the electrical activity of rabbits' neocortex and hippocampus showed that an increase of the frequency of the mesencephalic reticular formation stimulation from 60 to 200 imp/s led in both structures to an enhancement of the theta-rhythm (up to 130% in the neocortex and 147% in the(More)
1. In a microarea of the visual cortex with tangential dimensions of not more than 300 μ dependent relations between neurons are most often (80%) exhibited when recording cells with one electrode. With an increase of the distance between neurons the number of independently working pairs decreases. 2. The greatest diversity of the forms of cross-correlation(More)
Changes of correlation coefficients and coherence of the delta-, theta- and alpha-rhythms were studied between the somatosensory, motor and visual neocortex areas, dorsal hippocampus and dentate fascia at stimulation frequencies of the midbrain reticular formation from 60 to 1000 imp/s. It was shown that correlation coefficient between the structures(More)
The fundamental physical mechanisms of resonance action of an extremely weak (40 nT) alternating magnetic field at the cyclotron frequency combined with a weak (40 μT) static magnetic field, on living systems are analyzed in the present work. The experimental effects of such sort of magnetic fields were described in different papers: the very narrow(More)
Values of correlation coefficients (CC) and forms of cross-correlation functions of impulse activity were studied in neurones recorded with one microelectrode or simultaneously with two sticked together microelectrodes with tangential distance between tips of 70 and 140 mcm. Three main types of cross-correlation functions were singled out differing by peaks(More)
The results obtained earlier showed that the electroencephalogram is represented as convolution of harmonic functions having negative decrements with discrete evenly discontinuous white Gaussian noise. The method of EEG decrements calculation has been proposed and tested on model processes with set-up parameters and on real rat encephalograms. Studies of(More)
A nonlinear voltage dependence between the membrane and excitatory postsynaptic potentials coming via corticocortical connections was derived based on literature data. The existence of a region of stability of oscillations with increasing mean value of nonspecific afferent input was shown. As the afferent input strongly increases, a high-frequency component(More)