Functional connectivity between memory and reward centers across task and rest track memory sensitivity to reward

Cognitive, Affective & Behavioral Neuroscience
Lea FrankDagmar Zeithamova

Abstract

External motivation, such as a promise of future monetary reward for remembering an event, can affect which events are remembered. Reward-based memory modulation is thought to result from encoding and post-encoding interactions between dopaminergic midbrain, signaling reward, and hippocampus and parahippocampal cortex, supporting episodic memory. We asked whether hippocampal and parahippocampal interactions with other reward-related regions are related to reward modulation of memory and whether such relationships are stable over time. Individuals' memory sensitivity to reward was measured using a monetary incentive encoding task in which a cue indicated potential monetary reward (penny, dime, or dollar) for remembering an upcoming object pair. Functional connectivity between memory and reward regions was measured before, during, and following the task. Reward-related regions of interest were generated using a meta-analysis of existing studies on reward and included ventral striatum, medial and orbital prefrontal cortices and anterior cingulate cortex, in addition to midbrain. The results showed that connectivity between memory and reward regions tracked individual differences in reward modulation of memory, irrespective of when...Continue Reading

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Citations

May 10, 2020·AJNR. American Journal of Neuroradiology·J HodelR Lopes
May 28, 2019·Cognitive, Affective & Behavioral Neuroscience·Marie T Banich, Stan Floresco
Jul 18, 2021·Journal of Cognitive Neuroscience·Qi LinMarvin M Chun

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