Purely translational realignment in grid cell firing patterns following nonmetric context change

Marozzi, E., Ginzberg, L. L., Alenda, A. and Jeffery, K. J. (2015) Purely translational realignment in grid cell firing patterns following nonmetric context change. Cerebral Cortex, 25(11), pp. 4619-4627. (doi: 10.1093/cercor/bhv120) (PMID:26048956) (PMCID:PMC4816804)

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Grid cells in entorhinal and parahippocampal cortices contribute to a network, centered on the hippocampal place cell system, that constructs a representation of spatial context for use in navigation and memory. In doing so, they use metric cues such as the distance and direction of nearby boundaries to position and orient their firing field arrays (grids). The present study investigated whether they also use purely nonmetric “context” information such as color and odor of the environment. We found that, indeed, purely nonmetric cues—sufficiently salient to cause changes in place cell firing patterns—can regulate grid positioning; they do so independently of orientation, and thus interact with linear but not directional spatial inputs. Grid cells responded homogeneously to context changes. We suggest that the grid and place cell networks receive context information directly and also from each other; the information is used by place cells to compute the final decision of the spatial system about which context the animal is in, and by grid cells to help inform the system about where the animal is within it.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Jeffery, Professor Kate
Authors: Marozzi, E., Ginzberg, L. L., Alenda, A., and Jeffery, K. J.
College/School:College of Medical Veterinary and Life Sciences > School of Psychology & Neuroscience
Journal Name:Cerebral Cortex
Publisher:Oxford University Press
ISSN (Online):1460-2199
Published Online:05 June 2015
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Cerebral Cortex 25(11): 4619-4627
Publisher Policy:Reproduced under a Creative Commons License

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