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. 2016 Feb 17;10:13. doi: 10.3389/fncom.2016.00013

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Copyright © 2016 Mulas, Waniek and Conradt.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Excitatory sensory currents push the activity of grid network toward the right configuration. (A) Example of excitatory currents due to learned projections from the sensory map units to the grid cells after 30 min of robotic exploration of the arena: the bumps of excitation are arranged in a grid similar to that of the grid network activity (shown in B) but are not so well-defined. (B) Example of firing rate map for a network of grid cells. The spacing of the bumps in the grid network activity is related but not equal to the spacing of the grid pattern generated in space.