During hippocampal inactivation, grid cells maintain their synchrony, even when the grid pattern is lost

Author:

Almog Noam,Tocker Gilad,Bonnevie Tora,Moser Edvard,Moser May-Britt,Derdikman DoriORCID

Abstract

AbstractThe grid cell network in the MEC has been subject to thorough testing and analysis, and many theories for their formation have been suggested. To test some of these theories we re-analyzed data from Bonnevie et al. (2013), in which the hippocampus was inactivated and grid cells were recorded in the MEC, to investigate whether the firing associations of grid cells depend on hippocampal inputs. Specifically, we examined temporal and spatial correlations in the firing times of simultaneously recorded grid cells before and during hippocampal inactivation. Our analysis revealed evidence of network coherence in grid cells even in the absence of hippocampal input to the MEC, both in regular grid cells and in those that became head-direction cells after hippocampal inactivation. This favors models which suggest that phase relations between grid cells in the MEC are dependent on intrinsic connectivity within the MEC.

Publisher

Cold Spring Harbor Laboratory

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