[Peculiarities of behavior of offspring of rats-ambidexters after surviving vital stress].

Psychogenic trauma inflicted to mothers (Wistar rats) during pregnancy is more tragic for establishment of psychoemotional functions in offspring than in the rat pups whose mothers survived prior to pregnancy the stress connected with threat of life. The "antenatal stress" causes in the one-month-old offspring the depression-like behavior, while the stress one month prior to conception--the increased anxiety. Disturbances of the integral behavior in the test "open field" can be caused both by the acute psychogenic trauma of mothers and by its delayed consequences. The sharp impoverishment of behavior and the more pronounced psychoemotional disturbances are realized in female individuals regardless of the terms of the action. In the male offspring the vital stress during their mothers' pregnancy produces the rougher behavioral disturbances than stress prior to conception.

[Polyunsaturated fatty acids prevent the development of locomotor disturbances caused by changes in the neurohumoral background in rat pups].

The present study shows the effectiveness of using polyunsaturated fatty acids in pregnant rats in order to prevent behavioral alterations in neonatal rats caused by the action of the pathogenic peptide factors of blood serum with perinatal damage of the central nervous system.

[The influence of the rat maternal environment on the behavior of offspring].

In Wistar's rats, the postnatal influence of maternal behaviour on the motor and emotional state and the anxiety level of the posterity born from the intact rat-mothers-ambidexter but reared by the intact mothers-ambidexter with the motor deficit, were investigated. From the first day of life, the rat-mothers with the removed part of the sense-motor cortex (right or left) nursed and reared the litter. It was discovered that the reduction of motor activity and increase of negative emotional responses occurred in experimental litter at the age of 1 month as compared with the control group (intact litter reared by the ersatz healthy rat-mothers). In the test of elevated cruciform maze, a high level of anxiety was discovered. The experimental posterity showed an emotional tension as the dominant state. Left-side lesion of the sense-motor cortex of the ersatz mother resulted in a rougher disorder in the emotional state and movement than after right-side lesion.

[The locomotor and spatially oriented behavior of normal rat pups and in experimental pathology]. / Lokomotornoe i prostranstvenno-orientirovochnoe povedenie krysiat v norme i pri éksperimental'noi patologii.

Breach of locomotor functions and spatially oriented behaviour of rats' cubs after intraamniotic administration of the blood serum of children was shown to depend on the ontogenetic maturity and motor disturbances of donors. Injections were carried out on 14-th day of rats pregnancy.

[Individual typologic characteristics of the open-field behavior of rats]. / Individual'no-tipologicheskie osobennosti povedeniia krys v usloviiakh otkrytogo polia.

By means of ethograms record and analysis, connection has been studied between the properties of rats behaviour organization in the open field, determining the level of behaviour entropy in this test, and the speed of conditioned reflexes formation in the Skinner chamber. According to behaviour entropy level the rats are significantly divided into four groups; the lowest speed of conditioned reflexes formation in the Skinner's chamber is observed in the animals of the first (low entropy) group, the highest--in the fourth (high entropy) group. The obtained data are discussed according to Pavlov's concepts on the characteristics of the basic nervous processes, determining individual-typological characteristics of the higher nervous activity of the animal. Conclusion is made that division according to the level of behaviour entropy in the open field test may serve as a safe method of express-estimation of the animals abilities to conditioned habits formation.

[Probabilistic characteristics of "open field" behavior in the rat]. / Veroiatnostnye kharakteristiki povedeniia krys v usloviiakh "otkrytogo polia".

An analysis was made of the dynamics of probabilistic characteristics of the rat behaviour in the process of extinction of orienting-investigating behaviour in the "open field". Estimation of the entropy value related to behaviour permitted to divide the rats into two groups. The rats with high entropy values differed from those with low values by a more prolonged retention of a high level of locomotion, vertical stands, wall stands, peeping through a hole and grooming. It is suggested that a high entropy level and prolonged retention in the behaviour pattern of most of the elementary acts and poses may testify to a delayed process of extinction of orienting-investigating activity due to a higher level of the rats negative emotional state.