Cited by 46Memory and Neural MechanismsSpatial Cognition and NavigationNeurogenesis and neuroplasticity mechanisms

Grid scale drives the scale and long-term stability of place maps

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Mallory, Caitlin S., Hardcastle, Kiah, Bant, Jason S., Giocomo, Lisa M.·2018·Nature Neuroscience

Abstract

Medial entorhinal cortex (MEC) grid cells fire at regular spatial intervals and project to the hippocampus, where place cells are active in spatially restricted locations. One feature of the grid population is the increase in grid spatial scale along the dorsal-ventral MEC axis. However, the difficulty in perturbing grid scale without impacting the properties of other functionally defined MEC cell types has obscured how grid scale influences hippocampal coding and spatial memory. Here we use a targeted viral approach to knock out HCN1 channels selectively in MEC, causing the grid scale to expand while leaving other MEC spatial and velocity signals intact. Grid scale expansion resulted in place scale expansion in fields located far from environmental boundaries, reduced long-term place field stability and impaired spatial learning. These observations, combined with simulations of a grid-to-place cell model and position decoding of place cells, illuminate how grid scale impacts place coding and spatial memory.

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  • If grid cell outputs are available, CSCG can use those as additional sensations, which would speed up learning in the middle portions of empty arenas where unique sensations are not available, and help stabilize the place fields away from the boundaries or other landmark cues.

    “If grid cell outputs are available, CSCG can use those as additional sensations. This would speed up learning in the middle portions of empty arenas where unique sensations are not available, and it will also help stabilize the place fields away from the boundaries or other landmark cues (56, 57), consistent with the idea of grid cells providing an optional scaffolding for place cells (58).”

    From Space is a latent sequence: A theory of the hippocampus (2024) · cites this paper as [56]

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Authors
Mallory, C. S., Hardcastle, K., Bant, J. S., & Giocomo, L. M.
Affiliations
Stanford Medicine (US)
Corresponding author
  • Mallory, Caitlin S.
  • Giocomo, Lisa M.
Venue
Nature Neuroscience
Published
2018-01-15
Volume
21
Issue
2
Pages
270-282
ISSN
  • 1097-6256 (ISSN-L)
  • 1546-1726
OpenAlex
W2782629502
Cited by
46
References
65
Citations by year
2025: 6 · 2024: 8 · 2023: 4 · 2022: 2 · 2021: 6 · 2020: 7 · 2019: 9 · 2018: 4
FWCI
3.86
Type
journal article
Language
en
Open access
Locations
  • Nature Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Mental Health (R01MH106475, R56MH106475)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Physical Sciences › Engineering › Automotive Engineering › Spatial Cognition and Navigation
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
grid cells, place cells, medial entorhinal cortex, grid scale, HCN1 channels, spatial memory, spatial learning, position decoding
MeSH terms
Place Cells, Grid Cells, Action Potentials, Animals, Animals, Newborn, Brain Mapping, Electroencephalography, Female, Hippocampus, Male, Mice, Inbred C57BL, Mice, Transgenic, Models, Neurological, Neural Pathways, Phosphopyruvate Hydratase, Space Perception, Potassium Channels, Entorhinal Cortex, Green Fluorescent Proteins, Mice, Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels

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