Redundancy as a Graph-Based Index of Frequency Specific MEG Functional Connectivity
Joint Authors
Marzetti, Laura
De Vico Fallani, Fabrizio
Zappasodi, Filippo
Di Lanzo, Claudia
Pizzella, Vittorio
Source
Computational and Mathematical Methods in Medicine
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-10-16
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
We used a recently proposed graph index to investigate connectivity redundancy in resting state MEG recordings.
Usually, brain network analyses consider indexes linked to the shortest paths between cerebral regions.
However, important information might be lost about alternative trails by neglecting longer pathways.
We measured the redundancy of the connectivity by considering the multiple paths at the global level (i.e., scalar redundancy), across different path lengths (i.e., vector redundancy), and between node pairs (i.e., matrix redundancy).
We applied this approach to a robust frequency domain functional connectivity measure, the corrected imaginary part of coherence.
The redundancy in the MEG networks, for each frequency band, was significantly (P<0.05) higher than in the random graphs, thus, confirming a natural tendency of the brain to present multiple interaction pathways between different specialized areas.
Notably, this difference was more evident and localized among the channels covering the parietooccipital areas in the alpha range of MEG oscillations (7.5–13 Hz), as expected in the resting state conditions.
Interestingly enough, the results obtained with the redundancy indexes were poorly correlated with those obtained using shortest paths only, and more sensitive with respect to those obtained by considering walk-based indexes.
American Psychological Association (APA)
Di Lanzo, Claudia& Marzetti, Laura& Zappasodi, Filippo& De Vico Fallani, Fabrizio& Pizzella, Vittorio. 2012. Redundancy as a Graph-Based Index of Frequency Specific MEG Functional Connectivity. Computational and Mathematical Methods in Medicine،Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-454537
Modern Language Association (MLA)
Di Lanzo, Claudia…[et al.]. Redundancy as a Graph-Based Index of Frequency Specific MEG Functional Connectivity. Computational and Mathematical Methods in Medicine No. 2012 (2012), pp.1-9.
https://search.emarefa.net/detail/BIM-454537
American Medical Association (AMA)
Di Lanzo, Claudia& Marzetti, Laura& Zappasodi, Filippo& De Vico Fallani, Fabrizio& Pizzella, Vittorio. Redundancy as a Graph-Based Index of Frequency Specific MEG Functional Connectivity. Computational and Mathematical Methods in Medicine. 2012. Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-454537
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-454537