[Effect of the selective ligands 5-HT(1A) receptors administration on the impulsive and self-control behavior in rats].

The influence of drugs, agonist and antagonist of serotonin receptors 5-HT(1A) on the behavior of rats tested by the method of choice to the value of reinforcement was investigated. Depending on their preferences in food reinforcement rats were divided into self-monitoring (choosing more valuable, delayed reinforcement) and impulsive (low value, immediate reinforcement). An hour before the test animals were administrated i.

[Differences in behavior of impulsive and self-controlled rats in the open-field and light-dark tests].

The aim of the study was to reveal the relationship between impulsive behavior in rats, on the one hand, and locomotor activity and emotionality on the other hand. Rats were divided into groups according to their preference for reinforcements of different values. Animals that preferred valuable but delayed reinforcement in more than 60% of cases formed a self-controlled group, whereas rats that selected poor but immediate reinforcements in more than 60% of the cases were considered as impulsive.

Relationship between the types of behavioral reaction in a conditioned shake-off reflex and neocortical lateralization.

The nature of the spike activity and interhemisphere interactions of neurons in the parietal cortex (somatosensory representation of the ear) during the intersignal period before active shake-off and passive (freezing) reactions to stimuli was studied in rabbits after acquisition of a conditioned defensive escape reflex. Before passive reactions, in contrast to the situation before active shake-off, there were increases in right-sided influences on cells in the left hemisphere with delays of up to 100 msec, leading to asymmetry in interhemisphere interactions with right-sided dominance. Passive reactions were preceded by increases in the extent of frequencies in the delta range in the spike activity of individual neurons and in interactions between pairs of cells.

[Dependence of behavioral responses form during shake-off conditional reflex on laterality of the neocortex].

Pattern of discharges and interhemispheric interaction of parietal neurons (somatosensory presentation of the ear) were compared in interstimulus intervals before active shake-off and passive freezing reactions at stimuli after elaboration defensive avoid reflex. Before passive reactions in contrast to active right-side influences on left-side neurons were reinforced with delay to 100 ms, it result in appearence of asymmetry in interhemispheric interaction with right-side dominance. Before passive reactions intensity of delta-frequencies was increased in impulsation of single neurons and in interaction of cells pair.

Interhemisphere asymmetry of the neocortex and hippocampus during orientational-investigative behavior and freezing in rabbits.

Cross-correlation histograms were used to study the discharges of cortical neurons in symmetrical leads in both hemispheres (visual and parietal areas) and in hippocampal field CA1 on the right and left sides in rabbits in conditions of free behavior during exposure to emotionally significant stimuli. During active orientational-investigative responses to stimuli, as compared with baseline, the neocortex showed increases in left-sided influences on cells in the right hemisphere, with delays of up to 100 msec, which led to the appearance of asymmetry in the interhemisphere interaction, with left-sided dominance. On freezing, the left-sided influence weakened and the right hemisphere became dominant.