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On the structure of rabbit background eeg in the high frequency area of the spectrum


, : On the structure of rabbit background eeg in the high frequency area of the spectrum. Zhurnal Vysshei Nervnoi Deyatel'nosti Imeni I P Pavlova 41(4): 761-768

With the purpose of studying the character and structure of high frequency bioelectric activity of rabbits cerebral cortex in the state of calm alertness, the EEG ensembles of different areas of the cortex (sensorimotor, visual, acoustic) and dorsal hippocampus were studied with FFT method. A supposition was made about the presence of systemic organization of the background EEG in rabbits cerebral cortex, reflected, in particular, in the presence of determinated components both of chaotic and rhythmic character having different degrees of manifestation. Heterogenity was revealed in distribution of energies of spectral EEG components in the studied frequency ranges from 14.7 to 100 Hz with predominance of total specific energy value in the band of 14.7-60 Hz. In coherence, functions of all the studies pairs of EEG leads rhythmic component, stable in time, was absent. Functions of the mean EEG coherence in the band of 61-100 Hz had significantly greater values in comparison with the values in the band of 14.7-40 Hz.

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