Features extraction from time-varying cortical networks adopting a theoretical graph approach.
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.
De Vico Fallani
F
F
Interdepartmental Research Centre for Models and Information Analysis in Biomedical Systems, University Sapienza, Rome, Italy. fabrizio.devicofallani@uniroma1.it
Astolfi
L
L
Cincotti
F
F
Mattia
D
D
Tocci
A
A
Capitanio
S
S
Marciani
M G
MG
Salinari
H
H
Hesse
W
W
Witte
H
H
Gao
S
S
Colosimo
A
A
Babiloni
F
F
D000465:Algorithms; D001185:Artificial Intelligence; D001931:Brain Mapping / Q000379:methods*; D002540:Cerebral Cortex / Q000502:physiology*; D003627:Data Interpretation, Statistical; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D004569:Electroencephalography / Q000379:methods*; D006801:Humans; D015999:Multivariate Analysis; D009415:Nerve Net / Q000502:physiology*; D009473:Neuronal Plasticity / Q000502:physiology; D010363:Pattern Recognition, Automated / Q000379:methods*; D012044:Regression Analysis