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Integrating Spatial Working Memory and Remote Memory: Interactions between the Medial Prefrontal Cortex and

Ryan A Wirt1, James M Hyman2

  • 1Department of Psychology, University of Nevada Las Vegas, 4505 S. Maryland Pkwy, Las Vegas, NV 89154, USA. ryan.wirt@unlv.edu.

Brain Sciences
|April 20, 2017
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Summary

Information sharing between the medial prefrontal cortex (mPFC) and hippocampus (HC) is crucial for spatial working memory and remote memory recall. Recent evidence suggests these processes are more interconnected than previously thought.

Keywords:
Thetahippocampusmedial prefrontal cortexremote memoryspatial working memory

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Systems Neuroscience

Background:

  • Two research streams investigate information flow between the medial prefrontal cortex (mPFC) and hippocampus (HC).
  • Spatial working memory relies on theta-band synchrony between mPFC and HC for behavioral execution.
  • Memory consolidation studies indicate temporally modulated shifts in area dependency.

Purpose of the Study:

  • To review recent evidence on mPFC-HC interactions in memory.
  • To explore the interconnectedness of spatial working memory and remote memory recall.
  • To propose a novel conceptualization of medial prefrontal representations in these cognitive functions.

Main Methods:

  • Literature review of recent findings in neuroscience.
  • Analysis of studies on neural synchrony and memory.
  • Conceptual synthesis of existing research data.

Main Results:

  • Evidence suggests spatial working memory and remote memory recall are not entirely separate processes.
  • Interactions between mPFC and HC are fundamental for both spatial working memory and remote memory recall.
  • Temporal dynamics influence the dependency between these brain areas.

Conclusions:

  • The distinction between spatial working memory and remote memory recall may be less rigid than previously assumed.
  • Understanding mPFC-HC communication is key to elucidating memory functions.
  • A novel view of medial prefrontal representations could explain its role in diverse memory processes.