NDLI: Comparison of different multivariate methods for the estimation of cortical connectivity: simulations and applications to EEG data

Content Provider	IEEE Xplore Digital Library
Author	Astolfi, L. Cincotti, F. Mattia, D. Lai, M. Baccala, L. de Vico Fallani, F. Salinari, S. Ursino, M. Zavaglia, M. Babiloni, F.
Copyright Year	2005
Description	Author affiliation: Dip. Informatica e Sistemistica, La Sapienza Univ., Rome (Astolfi, L.)
Abstract	The problem of the definition and evaluation of brain connectivity has become a central one in neuroscience during the latest years, as a way to understand the organization and interaction of cortical areas during the execution of cognitive or motor tasks. Among various methods established during the years, the directed transfer function (DTF), the partial directed coherence (PDC) and the direct DTF (dDTF) are frequency-domain approaches to this problem, all based on a multivariate autoregressive modeling of time series and on the concept of Granger causality. In this paper we propose the use of these methods on cortical signals estimated from high resolution EEG recordings, a non invasive method which exhibits a higher spatial resolution than conventional cerebral electromagnetic measures. The principle contribution of this work are the results of a simulation study, testing the capability of the three estimators to reconstruct a connectivity model imposed, with a particular eye on the capability to distinguish between direct and indirect causality. An application to high resolution EEG recordings during a foot movement is also presented
Starting Page	4484
Ending Page	4487
File Size	299759
Page Count	4
File Format	PDF
ISBN	0780387414
DOI	10.1109/IEMBS.2005.1615463
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-01-17
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Brain modeling Electroencephalography Spatial resolution Neuroscience Transfer functions Coherence Signal resolution Electromagnetic measurements Testing Foot foot movement Directed Transfer Function Partial Directed Coherence High resolution EEG
Content Type	Text
Resource Type	Article

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