Proactive and retroactive interference with associative memory consolidation in the snail Lymnaea is time and circuit dependent.

ABSTRACT: Interference-based forgetting occurs when new information acquired either before or after a learning event attenuates memory expression (proactive and retroactive interference, respectively). Multiple learning events often occur in rapid succession, leading to competition between consolidating memories. However, it is unknown what factors determine which memory is remembered or forgotten. Here, we challenge the snail, Lymnaea, to acquire two consecutive similar or different memories and identify learning-induced changes in neurons of its well-characterized motor circuits. We show that when new learning takes place during a stable period of the original memory, proactive interference only occurs if the two consolidating memories engage the same circuit mechanisms. If different circui

SUBMITTER: Crossley M 

PROVIDER: S-EPMC6595009 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature