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Negative reinforcement impairs overnight memory consolidation

Andrew W. Stamm,Nam D Nguyen,B. Seicol,Abigail Fagan,Angela Oh,Michael Drumm,Maureen Lundt,R. Stickgold,E. Wamsley

Published 2014 in Learning & memory (Cold Spring Harbor, N.Y.)

ABSTRACT

Post-learning sleep is beneficial for human memory. However, it may be that not all memories benefit equally from sleep. Here, we manipulated a spatial learning task using monetary reward and performance feedback, asking whether enhancing the salience of the task would augment overnight memory consolidation and alter its incorporation into dreaming. Contrary to our hypothesis, we found that the addition of reward impaired overnight consolidation of spatial memory. Our findings seemingly contradict prior reports that enhancing the reward value of learned information augments sleep-dependent memory processing. Given that the reward followed a negative reinforcement paradigm, consolidation may have been impaired via a stress-related mechanism.

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