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L V Krushinskiĭ

Publications and source records attributed to L V Krushinskiĭ.

30 records · Page 2Linked to original sources
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[Features of the dynamics of the forebrain EEG of Emys orbicularis during the solving of an extrapolation problem].

Sharp EEG changes are recorded in bioelectrical activity of the dorsal cortex and dorsal ventricular edge in marsh tortoises in conditions of free movement during solving of an extrapolation task (a test of elementary reasoning ability). These changes of a pathological character, accompanied by neurotic states, were observed in some animals having correctly solved the task several times in succession (2-5), beginning with the first presentation. Such changes of EEG and behaviour were not found in tortoises that committed errors at first presentations of the task and only gradually learned correct solving. Formation of the adequate behaviour can proceed by two means: on the basis of elementary reasoning ability and learning. Disturbance of adequate behaviour in the experiment with characteristic changes of EEG testifies to a difficult state of the animal during solving of the extrapolation task.

Animals↗
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[Features of higher nervous activity in mice with Robertsonian chromosomal translocations].

The ability of laboratory mice to learn to solve a simple food searching task, and their ability to extrapolate the direction of stimulus movement, were investigated in animals of CBA inbred strain (64 mice) and in mice with Robertsonian fusion of 8 and 17 chromosomes -- Rb (8, 17) 1 IEM possessing different genetic background (122 mice). As the ability for extrapolation is tested while the animal has no previous experience of such task solving, this form of behaviour seems to be different from conditioning. Mice with Rb (8, 17) 1 IEM but not CBA mice proved to be capable to solve the extrapolatory task at its first presentation. Their learning ability was found to be also superior to that of CBA mice. The present data proved that mice with Rb (8, 17) 1 IEM translocation may serve as a very promising model for investigation of complex behaviour patterns.

Adaptation, Psychological↗
PubMedDate not supplied

[Physiological and genetic ways of studying the extrapolation capability of mice].

Elementary reasoning--the ability of mice to extrapolate the direction of alimentary stimulus movement--was investigated in gentically different groups of animals. It was shown that mice possessing. Robertsonian translocation Rb(8,17) 11EM were superior in the extrapolation task solving than mice with normal kariotype, or mice with Robertsonian translocations of other types (RB(5, 19)1Wh, Rb(6, 15)1ALD, Rb(9, 14)6Bnr, Rb(16, 17)7bnr). Mice selected for low brain weight were superior in the extrapolation task solving than mice with high brain weight in 3--11 generations of selection. In F12--F14 this difference was absent. Mice with Robertsonian translocations and mice selected for brain weight are perspective models for physiological and genetic study of elementary reasoning.

Animals↗