Российская академия наук


EXISTENTIAL ORGANIZATION OF BIOELECTRIC ACTIVITY OF THE BRAIN AT POSTERITY FROM RATS WITH A LATERAL INJURY OF THE BRAIN



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EXISTENTIAL ORGANIZATION OF BIOELECTRIC ACTIVITY OF THE BRAIN AT POSTERITY FROM RATS WITH A LATERAL INJURY OF THE BRAIN.

T.V. Avaliani., K.V. Konstantinov, A.V. Bykova, S.G. Tsikunov.

Federal State Budgetary Institution «Research Institute of Experimental Medicine» under the North-West Branch of RAMS, St. Petersburg, Russia, tanaavaleeani@mail.ru
The behavior of the one-month infant rats, which were born by females with an injury of the brain, has differences with normal rats and depends on mother’s trauma laterality. Posterity with a right-side trauma has destroyed researching activity and disturbing activity. With a left-side trauma is registered the increased physical activity and agitating behavior. An EEG reflects a functional condition and type of behavior. The work purpose was reveling features of the EEG existential organization of the infant rats, which was born by females with a lateral trauma of the sensomotor cortex.

Females in a month before conception, had an operation deleting of a sensomotor cortex in the right (R) and left (L) sides, than one-month posterity they had a test of an open field (OF). After this test they were implanted electrodes to the frontal and occipital areas (at right and left sides). The registration of EEG carried out in 3 days after operation. With results of a cross-correlation analysis was defined nature of an interaction of cortical zones of the brain (frontal, occipital assignments). The next stage was definition of leading, conducted and synchronous communications in compare with maximum of a correlation function (CF). If maximum of the CF was less than 0.3, then was registered absence of communication. A value of the CF was calculated in periods of 2 seconds (300-380 periods in a session).

A change of the type of the CF in relation to right occipital area (at right frontal assignments increased a lobe of leading (p<0.001) and decreased the lobe of conducted (p<0.02) communications). That result demonstrates reduction of dominating role of the right occipital area in comparison to normal. In the group R communications were changed between occipital areas and in the group L between the occipital and the frontal areas in the left side. All rats had reduced synchronous communications in the frontal assignments, these changes are more found in the group with a rough frustration of their behavior (OF test). To sum it up, should underline that profiles of the existential organization of the EEG, which reflects features of the behavior of infant rats from mothers with the brain’s injure are revealed.

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