Artículos de revistas
Contextual Pavlovian conditioning in the crab Chasmagnathus
Fecha
2013-03Registro en:
Fustiñana, María Sol; Carbo, Martin; Pedreira, Maria Eugenia; Romano, Arturo Gabriel; Contextual Pavlovian conditioning in the crab Chasmagnathus; Springer Heidelberg; Animal Cognition; 16; 2; 3-2013; 255-272
1435-9448
1435-9456
CONICET Digital
CONICET
Autor
Fustiñana, María Sol
Carbo, Martin
Pedreira, Maria Eugenia
Romano, Arturo Gabriel
Resumen
In contextual conditioning, a complex pattern of information is processed to associate the characteristics of a particular place with incentive or aversive reinforcements. This type of learning has been widely studied in mammals, but studies of other taxa are scarce. The contextsignal memory (CSM) paradigm of the crab Chasmagnathus has been extensively used as a model of learning and memory. Although initially interpreted as habituation, some characteristics of contextual conditioning have been described. However, no anticipatory response has been detected for animals exposed to the training context. Thus, CSM could be interpreted either as an associative habituation or as contextual conditioning that occurs without a context-evoked anticipatory response. Here, we describe a training protocol developed for contextual Pavlovian conditioning (CPC). For each training trial, the context (conditioned stimulus, CS) was discretely presented and Wnished together with the unconditioned stimulus (US). In agreement with the CSM paradigm, a robust freezing response was acquired during the 15 training trials, and clear retention was found when tested with the US presentation after short (2 and 4 h) and long (1–4 days) delays. This CPC memory showed forward but not simultaneous presentation conditioning and was context speciWc and protein synthesis dependent. Additionally, a weak CPC memory was enhanced during consolidation. One day after training, CPC was extinguished by repeated CS presentation, while one presentation induced a memory labilisation–reconsolidation process. Finally, we found an anticipatory conditioned response (CR) during the CS presentation for both shortterm (4 h) and long-term memory (24 h). These Wndings support the conditioning nature of the new paradigm.