Functional Networks: Similarities between brain dynamics and critical systems


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 is present. Functional Magnetic Resonance Imaging experiments reveals the presence of dense local positive correlations with few long range connections, 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.