Enriched encoding: reward motivation organizes cortical networks for hippocampal detection of unexpected events.

ABSTRACT: Learning how to obtain rewards requires learning about their contexts and likely causes. How do long-term memory mechanisms balance the need to represent potential determinants of reward outcomes with the computational burden of an over-inclusive memory? One solution would be to enhance memory for salient events that occur during reward anticipation, because all such events are potential determinants of reward. We tested whether reward motivation enhances encoding of salient events like expectancy violations. During functional magnetic resonance imaging, participants performed a reaction-time task in which goal-irrelevant expectancy violations were encountered during states of high- or low-reward motivation. Motivation amplified hippocampal activation to and declarative memory for expectan

SUBMITTER: Murty VP 

PROVIDER: S-EPMC4089383 | biostudies-literature | 2014 Aug

REPOSITORIES: biostudies-literature