In this work, a novel approach is proposed in order to capture relevant features related to the structure and organization of the functional brain networks estimated in the time-frequency domain. To achieve this, we used a cascade of computational tools able to estimate first the electrical activity of the cortical surface by using high resolution EEG techniques. Then, on the cortical signals from different regions of interests we estimated the time-varying functional connectivity patterns by means of the adaptive Partial Directed Coherence. Such time-varying connectivity estimation returns a series of causality patterns evolving during the examined task which can be summarized and interpreted with the aid of mathematical indexes based on the graph theory. The combination of all these methods is demonstrated on a set of high resolution EEG data recorded from a healthy subject performing a simple foot movement.

Features extraction from time-varying cortical networks adopting a theoretical graph approach / DE VICO FALLANI, Fabrizio; Astolfi, Laura; Cincotti, Febo; D., Mattia; A., Tocci; S., Capitanio; M. G., Marciani; H., Salinari; W., Hesse; H., Witte; S., Gao; Colosimo, Alfredo; Babiloni, Fabio. - 2007:(2007), pp. 5198-5201. (Intervento presentato al convegno 29th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society tenutosi a Lyon, FRANCE nel AUG 22-26, 2007) [10.1109/iembs.2007.4353513].

Features extraction from time-varying cortical networks adopting a theoretical graph approach

DE VICO FALLANI, FABRIZIO;ASTOLFI, LAURA;CINCOTTI, FEBO;COLOSIMO, Alfredo;BABILONI, Fabio
2007

Abstract

In this work, a novel approach is proposed in order to capture relevant features related to the structure and organization of the functional brain networks estimated in the time-frequency domain. To achieve this, we used a cascade of computational tools able to estimate first the electrical activity of the cortical surface by using high resolution EEG techniques. Then, on the cortical signals from different regions of interests we estimated the time-varying functional connectivity patterns by means of the adaptive Partial Directed Coherence. Such time-varying connectivity estimation returns a series of causality patterns evolving during the examined task which can be summarized and interpreted with the aid of mathematical indexes based on the graph theory. The combination of all these methods is demonstrated on a set of high resolution EEG data recorded from a healthy subject performing a simple foot movement.
2007
29th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Features extraction from time-varying cortical networks adopting a theoretical graph approach / DE VICO FALLANI, Fabrizio; Astolfi, Laura; Cincotti, Febo; D., Mattia; A., Tocci; S., Capitanio; M. G., Marciani; H., Salinari; W., Hesse; H., Witte; S., Gao; Colosimo, Alfredo; Babiloni, Fabio. - 2007:(2007), pp. 5198-5201. (Intervento presentato al convegno 29th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society tenutosi a Lyon, FRANCE nel AUG 22-26, 2007) [10.1109/iembs.2007.4353513].
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