[Conditioned reflexes in the white rat during space flight].
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Biomedical subjects
M A Kuznetsova
Publications and source records attributed to M A Kuznetsova.
[Retention and recovery of a goal-achieving habit in rats after a flight on biosatellite "Cosmos-782"].
The retention and recovery of food-procuring skill in the maze was impaired in rats after 19.5-days space flight. The study conducted 2--12 days after landing, revealed an increase in the number of erroneous movements and of refusals to cope with the maze, as well as in the time of reaching the goal. These phenomena cannot be explained only by reduction of alimentary excitability and muscular weakness. It is assumed that the observed changes in the higher nervous activity were due to a weakening of the basic nervous processes which might be caused by a decrease in the sensory impulse activity during weightlessness.
Animals↗
[Reactions of rats to behavior tasks of different degrees of difficulty after flight aboard the biosatellite "cosmos-782"].
Maze behaviour of rats was studied on 6--25th days after exposure on biosatellite "Kosmos-782". Presentation of a foreign stimulus (a bell) on the 6--7th day after return, had a weaker effect on the maze performance in experimental rats, than in the control group. The experimental animals were also better adapted, as compared to the control ones, to an increased functional stress on CNS (increased number of runs in the maze from 3 to 16 in one session), applied on 11--13th day after the return. Similarly, the ability to use previous experience in a new situation, tested an 15--20th day after the return was slightly higher in experimental animals than in the control. During elaboration of a habit in an utterly new complex maze, first runs in each session were performed by experimental rats in the same way as by the control ones, whereas in second runs the afterflight rats did considerably worse than those in the control. The data analysis showed that the described changes in higher nervous activity were not caused by muscle weakness; they were due to exhaustion of the higher parts of CNS, while closing functions remained intact.
Animals↗
[Formation of complex behavior habits in white rats after exposure to artificial gravitation aboard the Cosmos-936 biosatellite].
A study was made of the behaviour of albino rats solving complex tasks in the Lachman maze and in a maze of original design, on the 18th to 24th days after exposure on board the "Kosmos-936" biosatellite. In conditions of artificial gravitation the animals solved such tasks significantly worse than those which were not subjected to centrifugation on board. Control trials on Earth and some features of the experimental technique suggest that this fact is due to negative influence of angular velocities during centrifugation on the animal's central nervous system.
Animals↗