Rounding of abrupt phase transitions in brain networks

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Villa Martín P, Moretti P, Muñoz M
Zeitschrift: Journal of Statistical Mechanics-Theory and Experiment
Verlag: Institute of Physics: Hybrid Open Access
Jahr der Veröffentlichung: 2015
Band: 2015
Heftnummer: 1
ISSN: 1742-5468
Sprache: Englisch


Abstract


The observation of critical-like behavior in cortical networks represents a major step forward in elucidating how the brain manages information. Understanding the origin and functionality of critical-like dynamics, as well as its robustness, is a major challenge in contemporary neuroscience. Here, we present an extensive numerical study of a family of simple dynamical models, which describe activity propagation in brain networks through the integration of different neighboring spiking potentials, mimicking basic neural interactions. The requirement of signal integration may lead to discontinuous phase transitions in networks that are well described by the mean-field approximation, thus preventing the emergence of critical points in such systems. Brain networks, however, are finite dimensional and exhibit a heterogeneous hierarchical structure that cannot be encoded in mean-field models. Here we propose that, as a consequence of the presence of such a heterogeneous substrate with its concomitant structural disorder, critical-like features may emerge even in the presence of integration. These conclusions may prove significant in explaining the observation of traits of critical behavior in large-scale measurements of brain activity.



FAU-Autoren / FAU-Herausgeber

Moretti, Paolo Dr.
Lehrstuhl für Werkstoffsimulation


Autor(en) der externen Einrichtung(en)
Universidad de Granada


Zitierweisen

APA:
Villa Martín, P., Moretti, P., & Muñoz, M. (2015). Rounding of abrupt phase transitions in brain networks. Journal of Statistical Mechanics-Theory and Experiment, 2015(1). https://dx.doi.org/10.1088/1742-5468/2015/01/P01003

MLA:
Villa Martín, Paula, Paolo Moretti, and Miguel Ángel Muñoz. "Rounding of abrupt phase transitions in brain networks." Journal of Statistical Mechanics-Theory and Experiment 2015.1 (2015).

BibTeX: 

Zuletzt aktualisiert 2018-23-11 um 20:50