Independence of first- and second-order memories in newborn rabbits
2011
Coureaud , Gérard (INRA , Dijon (France). UMR 1324 Centre des Sciences du Goût et de l'Alimentation ) | Languille , Solène (Centre National de la Recherche ScientifiqueUniversité Paris 11, Orsay(France). Laboratoire de Neurobiologie de l’Apprentissage, de la Mémoire et de la Communication, UMR 8620 CNRS) | Joly , Virgine (INRA , Dijon (France). UMR 1324 Centre des Sciences du Goût et de l'Alimentation ) | Schaal , Benoist (INRA , Dijon (France). UMR 1324 Centre des Sciences du Goût et de l'Alimentation ) | Hars , Bernard (Centre National de la Recherche ScientifiqueUniversité Paris 11, Orsay(France). Laboratoire de Neurobiologie de l’Apprentissage, de la Mémoire et de la Communication, UMR 8620 CNRS)
The mammary pheromone promotes the acquisition of novel odorants (CS1) in newborn rabbits. Here, experiments pinpoint that CS1 becomes able to support neonatal learning of other odorants (CS2). We therefore evaluated whether these first- and second-order memories remained dependent after reactivation. Amnesia induced after CS2 recall selectively blocked this memory, when recall and amnesia of CS1 left the souvenir of CS2 safe; this finding partially differed from results obtained in adult mammals. Thus, in this model of neonatal appetitive odor learning, second-order memory seems to depend on first- order memory for its formation but not for its maintenance.
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