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Continuous Attractor Network Model for Conjunctive Position-by-Velocity Tuning of Grid Cells

Su, Bailu; Romani, Sandro; Tsodyks, Misha

The spatial responses of many of the cells recorded in layer II of rodent medial entorhinal cortex (MEC) show a triangular grid pattern, which appears to provide an accurate population code for animal spatial position. In layer III, V and VI of the rat MEC, grid cells are also selective to head-direction and are modulated by the speed of the animal. Several putative mechanisms of grid-like maps were proposed, including attractor network dynamics, interactions with theta oscillations or single-unit mechanisms such as firing rate adaptation. In this paper, we present a new attractor network model that accounts for the conjunctive position-by-velocity selectivity of grid cells. Our network model is able to perform robust path integration even when the recurrent connections are subject to random perturbations.

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Title
PLoS Computational Biology
DOI
https://doi.org/10.1371/journal.pcbi.1003558

More About This Work

Academic Units
Neuroscience
Publisher
Public Library of Science
Published Here
October 16, 2016