An extensive literature suggests a role for the prefrontal cortex and hippocampus in episodic memory, particularly in the re-construction of those memories; a growing literature is now suggesting a role for these structures in planning and imagination, particularly in the construction of future potential episodes, a process termed ``episodic future thinking''. These two processes have obvious similarities (they both entail construction of episodic representations) and obvious differences (memory is trying to reconstruct a real past, imagination is trying to hypothesize a potential future). However, it is not known how this neural circuit contributes to these phenomena, nor how the information processing differs between them. New mathematical techniques now allow decoding of represented variables from neural ensembles at very fast timescales, enabling the observation of transient, covert processes. The goal of this proposal is to use these new techniques to track changes in representation at cognitive (10 ms) timescales. Combining newly available multi-structure recording techniques, newly developed tasks, newly improved neural ensemble analysis techniques, and causal manipulations of the prelimbic cortex, we will examine the relationship between the representations of past events and future possibilities in hippocampus to determine the mechanism by which the hippocampus computes these representations.

Public Health Relevance

Episodic memory entails a process in which past events in one?s experience are re-constructed from memories; episodic future thinking entails a process in which future potential events are constructed for use in deliberation. Prefrontal cortex and hippocampus play roles in both of these processes, but how these computations are similar or different remain unknown. The goal of this proposal is to directly compare information processing in these structures during memory and planning processes.

Agency
National Institute of Health (NIH)
Institute
National Institute of Mental Health (NIMH)
Type
Research Project (R01)
Project #
5R01MH080318-10
Application #
9955388
Study Section
Neurobiology of Learning and Memory Study Section (LAM)
Program Officer
Buhring, Bettina D
Project Start
2008-06-01
Project End
2021-06-30
Budget Start
2020-07-01
Budget End
2021-06-30
Support Year
10
Fiscal Year
2020
Total Cost
Indirect Cost
Name
University of Minnesota Twin Cities
Department
Neurosciences
Type
Schools of Medicine
DUNS #
555917996
City
Minneapolis
State
MN
Country
United States
Zip Code
55455
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