Discrimination learning in paramecia

Armus, Harvard L.; Montgomery, Amber R.; Gurney, Rebecca L.; Jellison, Jenny L.

doi:10.1037/e527352012-026

Cited by 3 publications

(2 citation statements)

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“…Similar cases have been reported in Paramecium, and in this singlecelled organism there have also been many attempts to demonstrate associative learning. Most of these attempts, carried out decades ago, seem to be controversial, but recent evidence suggests that Paramecium can learn to associate between light and electrical stimulations (Armus et al 2006).…”

Section: Expanding the Epigenetics Research Programmentioning

confidence: 87%

Epigenetic learning in non-neural organisms

Ginsburg

Jablonka

2009

J Biosci

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Learning involves a usually adaptive response to an input (an external stimulus or the organism's own behaviour) in which the input-response relation is memorized; some physical traces of the relation persist and can later be the basis of a more effective response. Using toy models we show that this characterization applies not only to the paradigmatic case of neural learning, but also to cellular responses that are based on epigenetic mechanisms of cell memory. The models suggest that the research agenda of epigenetics needs to be expanded.

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Section: Expanding the Epigenetics Research Programmentioning

confidence: 87%

Epigenetic learning in non-neural organisms

Ginsburg

Jablonka

2009

J Biosci

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“…The localized spot configuration we have chosen eliminates any possibility for the paramecia to be aware of the presence of the trap before reaching the spot. It illustrates a pure random search process in the living world for which there is no possibility of self-adaptation in the paramecium behavior 24,25 nor any optimization of possible search parameters before becoming trapped. 26 Population aggregation occurs anyway, even if it is not driven by learning, nor is it the result of any adaptation ͑although we have not repeated the same experiment with paramecia having been trapped before and reintroduced in a clear medium to see if their motion is Fig.…”

Section: Discussionmentioning

confidence: 99%

On random search: Collection kinetics of Paramecia into a trap embedded in a closed domain

Deforet

Duplat

Vandenberghe

et al. 2010

American Journal of Physics

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We study the kinetics of a large number of organisms initially spread uniformly in a circular two-dimensional medium, at the center of which a smaller circular trap has been introduced. We take advantage of the acidophily of Paramecium caudatum, which, coming from a neutral medium, penetrates a region of moderate acidity but moves back in the opposite situation when it meets a sharp negative acidity gradient to quantify its rate of irreversible aggregation into a spot of acidified medium in water. Two regimes are distinguished: A ballistic regime characteristic of "fresh" paramecia where the organisms swim in a straight path with a well defined velocity and a Brownian regime characteristic of older paramecia where the mean free path of the organisms is smaller than the system size. Both regimes are characterized by distinct aggregation laws. They both result from a pure random trapping process that appears to have no adaptive strategy.

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Генез И Эволюция Ориентировочно-Исследовательского Поведения

Grechenko¹

2013

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Ориентировочно-исследовательская активность предваряет любой поведенческий акт. Это основная форма адаптивного поведения, которая возникает в ответ на любое новое свойство окружающей среды. Такое поведение обнаружено у всех живых существ, имеющих нервную систему. Есть ли оно у их эволюционных предшественников одноклеточных организмов? Фактический материал, накопленный предыдущими исследованиями, приводит к следующему предположению: одноклеточные эукариоты имеют ориентировочно-исследовательское поведение, которое модифицирует их последующую активность. В проведенных опытах изучалось поведение одноклеточных Paramecium caudatum при появлении в окружающем пространстве новых свойств, а в электрофизиологических опытах регистрировались внутриклеточные показатели формирования нервной модели стимула при повторном действии электрических раздражений (привыкания). Результаты показали, что появление новых свойств в жизненном пространстве вызывает ориентировочно-исследовательское поведение микроорганизмов, выраженное изменениями двигательной активности, весьма разнообразными по форме проявления.

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Discrimination learning in paramecia

Cited by 3 publications

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Epigenetic learning in non-neural organisms

Epigenetic learning in non-neural organisms

On random search: Collection kinetics of Paramecia into a trap embedded in a closed domain

Генез И Эволюция Ориентировочно-Исследовательского Поведения

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