Percolation Approach to Study Connectivity in Living Neural Networks

Details Percolation Approach to Study Connectivity in Living Neural Networks Percolation Approach to Study Connectivity in Living Neural Networks

2010-07-28

arxiv.org/abs/1007.5016v1

9th Granada Seminar 2006 - Cooperative Behavior in Neural Systems AIP, eds Garrido PL, Marro J, & Torres JJ (AIP, Granada, SPA

Biology

Quantitative Biology

Neurons and Cognition

Keywords: neural networks, graphs, connectivity, percolation, giant component PACS: 87.18.Sn, 87.19.La, 64.60.Ak http://www.

Scientific paper

We study neural connectivity in cultures of rat hippocampal neurons. We measure the neurons' response to an electric stimulation for gradual lower connectivity, and characterize the size of the giant cluster in the network. The connectivity undergoes a percolation transition described by the critical exponent $\beta \simeq 0.65$. We use a theoretic approach based on bond.percolation on a graph to describe the process of disintegration of the network and extract its statistical properties. Together with numerical simulations we show that the connectivity in the neural culture is local, characterized by a gaussian degree distribution and not a power law on

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