Publications by authors named "Krushinskii L"

The behaviour of mice with normal karyotype and those with robertsonian translocations was studied. The ability of the animals to solve an extrapolatory task was analysed. The experimental procedure was initiated with presentation of a food bait which the animal could reach only through a small opening in a screen.

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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.

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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.

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A study was made on 52 birds of five Corvidae species of the ability to solve an elementary logical problem proposed by L. V. Krushinsky and N.

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Sound exposure to 100--120 dB caused death of about 6--16% of white rats KM line from the blood circulation disturbances. The hyperbaric oxygenation (2 atm) decreased the death rate among rats of 4 to 15 months old while having no effect upon younger ones (2--4 months old). The rats who died in hyperbaric oxygenation suffered from O2 intoxication more often than those who survived.

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The reasoning ability was investigated in 29 Corvidae birds. The experimental task consisted in finding a hidden bait, the task being based on the fact that volumetric bait could be hidden in a volumetric geometrical figure only and not in a flat one. Thus it was possible to value the bird's ability to operate the empirical dimensions of objects.

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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).

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