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Updated: Feb 26, 2026

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Place and Grid Cells in a Loop: Implications for Memory Function and Spatial Coding.

César Rennó-Costa1,2, Adriano B L Tort2

  • 1Digital Metropolis Institute, Federal University of Rio Grande do Norte, RN 59075-050, Brazil, and cesar@imd.ufrn.br.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|July 14, 2017
PubMed
Summary
This summary is machine-generated.

The hippocampus-entorhinal circuit uses interacting place and grid cells to form a coupled spatial code. This model explains how these cells mutually influence each other to create a cognitive map for navigation.

Keywords:
entorhinal cortexgrid cellhippocampuspattern completionplace cellremapping

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Cognitive Science

Background:

  • Place cells in the hippocampus and grid cells in the medial entorhinal cortex possess distinct spatial codes.
  • The precise relationship and mutual influence between these two cell types remain poorly understood.

Purpose of the Study:

  • To investigate the mutual influence between place and grid cells in establishing spatial codes.
  • To model the hippocampus-entorhinal circuitry as a loop to understand their interaction dynamics.

Main Methods:

  • Developed a computational model of place and grid cells organized in a loop.
  • Used computer simulations to replicate experimental findings in rats.
  • Assessed model features against neurophysiological data, including remapping and realignment phenomena.

Main Results:

  • Grid and place cell interactions converge rapidly.
  • Place cell spatial codes are modulated, not solely dependent on, grid cell input.
  • Sensory input plasticity is crucial for pattern completion in place cells.
  • Grid cell realignment is explained by place cell remapping.
  • Global and rate remapping switches are self-organized.
  • Grid cell input stabilizes place cell codes against noisy sensory information.

Conclusions:

  • The hippocampus-entorhinal circuit employs mutual grid and place cell interactions for spatial encoding.
  • This interdependence is proposed to underlie cognitive map formation and utilization.
  • A coupled code formed by place and grid cells provides a new interpretation of spatial representation.