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[The wave-like character of the defence conditioned reflex acquisition in rats].

The dynamic peculiarities of formation of conditioned avoidance in rats were studied during 15-day sessions using different experimental paradigms (massed and spaced training). In all the experimental situations, the acquisition curves were wave-like (independently of the paradigm). Regression curves of the 6th or 7th order most perfectly fit the experimental data, which suggests that the acquisition dynamics in both paradigms is non-linear.

Animals↗
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[The effect of iproniazid on biogenic amine levels, elaboration and reproduction of alimentary conditioned reflexes].

A study of the action of iproniaside on alimentary conditioning has shown that even its small doses (25 mg/kg) disturb the formation of the conditioned reaction, while large doses (200-250 mg/kg) do not disturb the reproduction of the conditioned reaction elaborated and stabilized before the administration of the drug. Hence, dissociated learning with the use of iproniaside is impossible. The applied doses of iproniaside result in an increased level of biogenic amines in the dopaminergic nigro-neostriate and reticulo-septal brain systems. It is therefore assumed that the effects of iproniaside on learning are due to its influence on the level of the CNS biogenic amines.

Animals↗