Conference Proceedings

Orthogonalized Partial Directed Coherence for Functional Connectivity Analysis of Newborn EEG

Amir H Omidvarnia, Ghasem Azemi, Boualem Boashash, John M O'Toole, Paul Colditz, Sampsa Vanhatalo, T Huang (ed.), Z Zeng (ed.), C Li (ed.), CS Leung (ed.)

NEURAL INFORMATION PROCESSING, ICONIP 2012, PT II | SPRINGER-VERLAG BERLIN | Published : 2012

Abstract

The aim of this study is to develop a time-frequency method and test its applicability to investigating directional cortical connectivity in the newborn brain considering the effect of volume conduction. We modified time-varying partial directed coherence (tv-PDC) based on orthogonalization of the MVAR model coefficients to deal with the effect of mutual independent sources. The novel measure was then tested using a simulated signal with feature dimensions relevant to EEG activity. From the neonatal EEG responses evoked by flash light stimuli (1Hz), we extracted the directional interactions over time within each hemisphere. The results suggest that the method is able to detect directed infor..

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Grants

Awarded by Qatar National Research Fund under National Priorities Research Program(NPRP)


Awarded by European Community


Funding Acknowledgements

This publication was made possible by a grant from the Qatar National Research Fund under its National Priorities Research Program award number NPRP 09-465-2-174. The authors gratefully acknowledge the support of Helsinki University Hospital for providing the newborn EEG datasets. Dr. Sampsa Vanhatalo was supported by the European Community's Seventh Framework Program European Community FP7-PEOPLE-2009-IOF, grant agreement No. 254235.