Critical functional networks : Similarities between brain dynamics and Ising model

PABLO BALENZUELA; DANIEL FRAIMAN; DANTE CHIALVO

Punta del Este, Uruguay

Conferencia; XVI Conference on Non-equilibrium Statistical Mechanics and Nonlinear Physics MEDIFYNOL 2008; 2008

In last years, a lot of effort has been done in the characterization of functional brain networks in order to describe large scale brain organization. Even when the brain is at rest, complex spatio- temporal organization in fMRI experiments reveals the presence of dense local correlations with few long range connections, long living meta-stable states and anticorrelated non-local structures. In this work, we show that these features associated to complex brain functional networks can be found in a paradigmatic case of critical behavior with just nearest neighbors interactions on a square lattice: the Ising model at critical temperature.