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Experience-dependent rescaling of entorhinal grids
The firing pattern of entorhinal 'grid cells' is thought to provide an intrinsic metric for space. We report a strong experience-dependent environmental influence: the spatial scales of the grids
Path integration in mammals
TLDR
The current literature on path integration and its interaction with external, location‐based cues is reviewed and special importance is given to the correlation between observable behavior and the activity pattern of particular neural cell populations that implement the internal representation of space.
Integration of visual motion and locomotion in mouse visual cortex
TLDR
Recordings from mice that traversed a virtual environment indicate that V1 in the mouse participates in a multimodal processing system that integrates visual motion and locomotion during navigation.
Heterogeneous Modulation of Place Cell Firing by Changes in Context
TLDR
It is demonstrated, for the first time, that there is a heterogeneous input by contextual inputs into the hippocampus, and a model of contextual remapping of place cells is proposed in which the geometric inputs are selectively activated by subsets of contextual stimuli.
Anisotropic encoding of three-dimensional space by place cells and grid cells
TLDR
It seems that grid cell odometry (and by implication path integration) is impaired or absent in the vertical domain, at least when the rat itself remains horizontal, suggesting that the mammalian encoding of three-dimensional space is anisotropic.
Grid Cells Form a Global Representation of Connected Environments
TLDR
Recording mEC grid cells in rats foraging provides the first evidence that in a complex environment, grid cell firing can form the coherent global pattern necessary for them to act as a metric capable of supporting large-scale spatial navigation.
Do rats use shape to solve "shape discriminations"?
TLDR
It is found that when discriminating triangles from squares, rats did not use shape but instead relied on local luminance differences in the lower hemifield, suggesting that although rats can process both dimensions simultaneously, they do not naturally solve shape discrimination tasks this way.
How heterogeneous place cell responding arises from homogeneous grids—A contextual gating hypothesis
TLDR
It is proposed that when the animal first enters a new environment, the relatively homogeneous input from the grid cells becomes spatially clustered by Hebbian processes in the dendritic tree so that inputs active in the same context and having overlapping fields come to terminate on the same sub‐branches of the tree.
An independent, landmark-dominated head direction signal in dysgranular retrosplenial cortex
We investigated how landmarks influence the brain's computation of head direction and found that in a bidirectionally symmetrical environment, some neurons in dysgranular retrosplenial cortex showed
Grid Cells Encode Local Positional Information
TLDR
How discriminable the individual fields of a given grid cell are is asked by looking at the distribution of field firing rates and reproducibility of this distribution across trials, which suggests that additional local information is being overlaid onto the global hexagonal pattern of grid cells.
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