Attractor neural networks storing multiple space representations: a model for hippocampal place fields

Details Attractor neural networks storing multiple space representations: a model for hippocampal place fields Attractor neural networks storing multiple space representations: a model for hippocampal place fields

1998-07-07

arxiv.org/abs/cond-mat/9807101v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

19 RevTeX pages, 8 pes figures

Scientific paper

10.1103/PhysRevE.58.7738

A recurrent neural network model storing multiple spatial maps, or ``charts'', is analyzed. A network of this type has been suggested as a model for the origin of place cells in the hippocampus of rodents. The extremely diluted and fully connected limits are studied, and the storage capacity and the information capacity are found. The important parameters determining the performance of the network are the sparsity of the spatial representations and the degree of connectivity, as found already for the storage of individual memory patterns in the general theory of auto-associative networks. Such results suggest a quantitative parallel between theories of hippocampal function in different animal species, such as primates (episodic memory) and rodents (memory for space).

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