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E I Ochinskaia

Publications and source records attributed to E I Ochinskaia.

7 recordsLinked to original sources
PubMedDate not supplied

[Participation of the dorsal cortex of the forebrain in the solving by turtles of an extrapolation task during its first and multiple presentations].

In experiments with ablation of the forebrain dorsal cortex in turtles it has been established that this structure plays a significant role in first solving of an extrapolation task (6-19 times) and looses its integrating role at multiple test solving (40-195 times). The obtained data testify to the presence of two types of animals adaptive behaviour in solving the extrapolation task: based on operation with empirical laws of movement and manifested at first task presentations (elementary rational animals activity), and that based on learning and appearing after multiple reiterations of the experimental situation in the form of motor conditioned reflex of passing the obstacle from the corresponding side.

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PubMedDate not supplied

[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.

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PubMedDate not supplied

[Behavior of fish in groups presented with an extrapolation problem].

Grouped carps as well as isolated fishes were shown to be uncapable to extrapolate the direction of movement of an alimentary stimulus after its disappearance from the visual field. Differences in behaviour of isolated fishes and grouped ones as well as those between the groups of different size and composition were revealed in repeated performance of the same extrapolation task. Groups of six fishes exhibited higher behavioural plasticity in comparison to isolated fishes and groups of two unlearned animals: in the former orienting-exploratory activity was higher and the process of learning more stable. At minimal group size (two animals) learning was accelerated only in the case if one of the fishes had been previously learned. Some decrease in efficiency of task solving was observed in a learned fish after its grouping with unlearned one.

Animals↗
PubMedDate not supplied

[Extrapolation reactions following destruction of the dorsal cortex of the turtle forebrain].

Turtles Emys orbicularis (14 individuals) with ablated middle-anterior parts of the forebrain dorsal cortex proved unable to solve a problem calling for extrapolating the direction of the movement of a food stimulus. Intact turtles (11 individuals) and those (six individuals) which underwent control operations (including ablation of the posterior part of the dorsal cortex) correctly solved the problem, beginning with its first presentations. A conclusion has been drawn on the significant part played by the middle-anterior parts of the forebrain dorsal cortex coinciding in turtles with the convergence zone of different afferent systems, in the integration of a complex form of behaviour linked with the pursuit of and search for a food object after its disappearance from the animal's visual field.

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