Parallel memory traces are built after an experience containing aversive and appetitive components in the crab Neohelice

Proceedings of the National Academy of Sciences of the United States of America
Martín KlappenbachF F Locatelli

Abstract

The neurobiology of learning and memory has been mainly studied by focusing on pure aversive or appetitive experiences. Here, we challenged this approach considering that real-life stimuli come normally associated with competing aversive and appetitive consequences and that interaction between conflicting information must be intrinsic part of the memory processes. We used Neohelice crabs, taking advantage of two well-described appetitive and aversive learning paradigms and combining them in a single training session to evaluate how this affects memory. We found that crabs build separate appetitive and aversive memories that compete during retrieval but not during acquisition. Which memory prevails depends on the balance between the strength of the unconditioned stimuli and on the motivational state of the animals. The results indicate that after a mix experience with appetitive and aversive consequences, parallel memories are established in a way that appetitive and aversive information is stored to be retrieved in an opportunistic manner.

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Citations

May 16, 2019·The Journal of Experimental Biology·Carolina E Reisenman, Kristin Scott
Feb 27, 2020·The Journal of Experimental Biology·Brian GancedoDaniel Tomsic
Jun 3, 2020·The Journal of Comparative Neurology·Francisco Javier MazaAlejandro Delorenzi
Jun 25, 2019·Frontiers in Physiology·Morgane Nouvian, C Giovanni Galizia
Feb 5, 2021·The Journal of Experimental Biology·Shione OkadaToshiki Nagayama
Mar 12, 2021·The Journal of Experimental Biology·Martín KlappenbachRamiro Freudenthal
Apr 30, 2021·The Journal of Experimental Biology·Martín KlappenbachRamiro Freudenthal

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