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Related Experiment Video

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Brain Imaging Investigation of the Memory-Enhancing Effect of Emotion
15:57

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Ventromedial prefrontal cortex activation is associated with memory formation for predictable rewards.

Katharina A Bialleck1, Hans-Peter Schaal, Thorsten A Kranz

  • 1Department of Epileptology, University of Bonn, Bonn, Germany.

Plos One
|February 18, 2011
PubMed
Summary

Predictable rewards enhance long-term memory (LTM) formation, particularly when associated with reliable outcomes. This study reveals the ventromedial prefrontal cortex (vmPFC) plays a key role in remembering items linked to predictable rewards.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Decision Science

Background:

  • Dopamine release shifts during reinforcement learning, from reward consumption to prediction.
  • Reward-predicting cues enhance long-term memory (LTM) via dopaminergic projections to the ventral striatum.
  • The effect of reward predictability on memory for items consumed during reward is less understood.

Purpose of the Study:

  • To investigate if memory for items associated with reward consumption is facilitated.
  • To compare LTM for reward-predicting cues versus items consumed during reward.
  • To examine the role of reward predictability in memory formation.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) paradigm.
  • Comparison of LTM for reward-predicting and neutral cues.
  • Analysis of LTM for items during consumption of reliably vs. less predictable rewards.

Main Results:

  • Ventral striatum activation and enhanced memory formation during reward anticipation.
  • Items associated with less predictable rewards were remembered worse than those with reliably predictable rewards.
  • Processing reliably predictable rewards activated the ventromedial prefrontal cortex (vmPFC), linked to successful memory formation.

Conclusions:

  • Consumption of reliably predictable rewards facilitates LTM formation.
  • Ventral striatum activation is associated with reward anticipation and memory.
  • Ventromedial prefrontal cortex (vmPFC) activation correlates with successful memory formation for reliably predictable rewards.