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An Integrated Index: Engrams, Place Cells, and Hippocampal Memory
Travis D Goode1, Kazumasa Z Tanaka2, Amar Sahay1
1Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02114, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114 USA; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA.
Neuron
|August 9, 2020
Summary
Hippocampal engrams act as indices for memory recall, linking to place cells and enabling flexible information routing. This indexing framework offers new insights into memory function and potential therapies for hippocampal dysfunction.
Area of Science:
- Neuroscience
- Memory Research
- Cognitive Science
Background:
- The hippocampus and its network are crucial for episodic memory encoding and recall.
- Understanding the precise mechanisms of memory retrieval remains a key challenge in neuroscience.
Purpose of the Study:
- To propose that hippocampal engrams function as indices to mediate memory recall.
- To explore the relationship between engrams, place cells, and the determinants of flexible information routing for memory reinstatement.
Main Methods:
- Review and synthesis of recent anatomical, physiological, and behavioral studies.
- Theoretical framework development integrating engram function with memory indexing.
Main Results:
- Hippocampal engrams are proposed to serve as indices, facilitating memory recall.
- Engram properties allow flexible routing of information for memory reinstatement.
Conclusions:
- Viewing hippocampal engrams as indices provides a novel framework for memory function.
- This perspective opens new research avenues and potential therapeutic strategies for hippocampal dysfunction.
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