Short- and long-term Habituation of photonegative and exploratory responses in the flatworm planaria (Dugesia)

Journal article


Prados, J., Fisher, C., Moreno-Fernández, M.M., Tazumi, T. and Urcelay, G.P. 2020. Short- and long-term Habituation of photonegative and exploratory responses in the flatworm planaria (Dugesia). Journal of Experimental Psychology: Animal Learning and Cognition. 46 (3), pp. 354-365. https://doi.org/10.1037/xan0000256
AuthorsPrados, J., Fisher, C., Moreno-Fernández, M.M., Tazumi, T. and Urcelay, G.P.
Abstract

Two experiments address the habituation of photonegative and exploratory responses in the flatworm planaria (Dugesia). Planarians possess a well-documented photonegative response; Experiment 1 showed that repeated exposures to a bright light source with short inter trial intervals (ITIs) within 1 experimental session gradually weakens the unconditioned photonegative response. In addition, it was found that
presentation of an unexpected arousal-increasing stimulus (dropped water or a shock) temporarily re-establishes the photonegative response. Experiment 2 addressed the development of long-term habituation; we recorded the locomotor activity of the animals exposed to an inescapable bright light. Experiments 2A and 2B showed that planarians develop long-term habituation but only when they were
trained in relatively novel contexts; when they were trained in familiar contexts (in surfaces similar to the ones in the home) the development of habituation was severely impaired. The results are discussed by reference to the theory of short- and long-term habituation put forward by Allan R. Wagner (Wagner, 1976), highlighting the impact that this theory has had in the research of invertebrate learning.

Keywords short-term habituation; long-term habituation; invertebrate learning; planaria
Year2020
JournalJournal of Experimental Psychology: Animal Learning and Cognition
Journal citation46 (3), pp. 354-365
PublisherAmerican Psychological Association (APA)
ISSN2329-8456
Digital Object Identifier (DOI)https://doi.org/10.1037/xan0000256
Web address (URL)https://psycnet.apa.org/record/2020-55131-012
Publisher's version
Output statusPublished
Publication datesJul 2020
Publication process dates
Deposited30 Aug 2022
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