Effects of nucleus rapher on the spectral character of electrical activity in the structures of the vision analyzer

The present work is devoted to the study of neurophysiological mechanisms of participation of the nucleus rapher in the plastic properties of the visual analyzer in the correction of dysfunction caused by retinal dystrophy. To achieve this goal, we used the method of spectral analysis of the potentials of the electroencephalogram in the central structures of the vision analyzer. First of all, a comparative analysis of the spectral characteristics of the EEG potentials at the studied structures was carried out during the background activity of the brain. The results of the studies performed showed that one of the characteristic features of the EEG in the structures of the visual analyzer is that the maximum level of the spectrum is mainly concentrated in the delta and theta frequency ranges of the EEG. After exposure to electrical stimulation of one of the nuclei of the 5-HT-ergic system, the polymodality of spectral properties in the visual cortex (VC) and colliculus superior (CS) is disturbed. The main maximum level of the spectra after stimulation of nR the EEG waves shift to higher frequency regions (4-5 Hz and 9-10 Hz). As a result of dysfunction, the amplitude of the main peak of EEG spectral features in the delta frequency range decreases and the second maximum level of the spectrogram decreases in the range of theta. Similar changes are observed in the spectra of EEG potentials in the subcortical structures of the visual analyzer. In the case of experimental retinal dystrophy, this corresponds to an increase the generation of potentials of the EEG at the delta range after exposure to electrical stimulation of the 5-HT-ergic system.