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How environment geometry affects grid cell symmetry and what we can learn from it.

Krupic, J. and Bauza, M. and Burton, S. and Lever, C. and O'Keefe, J. (2014) 'How environment geometry affects grid cell symmetry and what we can learn from it.', Philosophical transactions of the Royal Society B : biological sciences., 369 (1635). p. 20130188.


The mammalian hippocampal formation provides neuronal representations of environmental location but the underlying mechanisms are unclear. The majority of cells in medial entorhinal cortex and parasubiculum show spatially periodic firing patterns. Grid cells exhibit hexagonal symmetry and form an important subset of this more general class. Occasional changes between hexagonal and non-hexagonal firing patterns imply a common underlying mechanism. Importantly, the symmetrical properties are strongly affected by the geometry of the environment. Here, we introduce a field–boundary interaction model where we demonstrate that the grid cell pattern can be formed from competing place-like and boundary inputs. We show that the modelling results can accurately capture our current experimental observations.

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Publisher statement:© 2013 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License, which permits unrestricted use, provided the original author and source are credited.
Date accepted:20 December 2013
Date deposited:19 January 2017
Date of first online publication:23 December 2013
Date first made open access:No date available

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