[Regression analysis of an instrumental conditioned tentacular reflex in the edible snail]. / Regressionnyi analiz instrumental'nogo uslovnogo tentakuliarnogo refleksa u vinogradnoi ulitki.

Regression analysis revealed the opportunity of approximation with exponential mathematical model of the learning curves of conditioned tentacle reflex. Retention of the reflex persisted for more than three weeks. There were some quantitative differences between conditioning of the right and the left tentacle. There was formation of the reflex in every session during spring period, but there was no retention between sessions. The conditioned tentacle reflex may be employed in neuropharmacological studies.

[Specific and nonspecific components in the neurohumoral link of the conditioned food-refusal reflex in the edible snail]. / Spetsificheskii i nespetsificheskii komponenty neirogumoral'nogo zvena uslovnogo refleksa otkaza ot pishchi u vinogradnoi ultiki.

On snails, the action was studied of hemolymph of donors with conditioned food refusal reflex on acquisition of the same habit by intact snails-recipients in case of coincidence or of difference of conditioned stimuli in donors and recipients. Specific component of the facilitating effect was distinctly manifest at selection of optimal doze of hemolymph and depended on the season. At non-optimal parameters of the experiment the specific component of the facilitating effect was masked by the non-specific one, or an inhibitory effect took place. The data obtained testify to multicomponent composition of the neurohumoral link in the mechanism of conditioned reflex formation.

[The humoral link in the mechanism of formation of conditioned food refusal in the edible snail]. / Gumoral'noe zveno v mekhanizme formirovaniia uslovnogo refleksa otkaza ot pis chi u vinogradnoi ulitki.

Effect was studied of hemolymph of snails-donors with conditioned food refusal, on learning the same habit by snails-recipients. Facilitation was observed of the recipients' learning depending on the quantity of injected hemolymph and the type of conditioned stimulus. The hemolymph of pseudo-conditioned donors inhibited the learning of intact snails-recipients. The possibility is suggested of appearance in the hemolymph of conditioned snails of one or several chemical factors, capable to facilitate elaboration of the same conditioned reflex.