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Changes in EEG Power Spectral Density and Cortical Connectivity in Healthy and Tetraplegic Patients during a Motor Imagery Task
Joint Authors
Babiloni, Fabio
Astolfi, Laura
Ursino, Mauro
Zavaglia, Melissa
Cona, Filippo
Source
Computational Intelligence and Neuroscience
Issue
Vol. 2009, Issue 2009 (31 Dec. 2009), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2009-06-24
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
Knowledge of brain connectivity is an important aspect of modern neuroscience, to understand how the brain realizes its functions.
In this work, neural mass models including four groups of excitatory and inhibitory neurons are used to estimate the connectivity among three cortical regions of interests (ROIs) during a foot-movement task.
Real data were obtained via high-resolution scalp EEGs on two populations: healthy volunteers and tetraplegic patients.
A 3-shell Boundary Element Model of the head was used to estimate the cortical current density and to derive cortical EEGs in the three ROIs.
The model assumes that each ROI can generate an intrinsic rhythm in the beta range, and receives rhythms in the alpha and gamma ranges from other two regions.
Connectivity strengths among the ROIs were estimated by means of an original genetic algorithm that tries to minimize several cost functions of the difference between real and model power spectral densities.
Results show that the stronger connections are those from the cingulate cortex to the primary and supplementary motor areas, thus emphasizing the pivotal role played by the CMA_L during the task.
Tetraplegic patients exhibit higher connectivity strength on average, with significant statistical differences in some connections.
The results are commented and virtues and limitations of the proposed method discussed.
American Psychological Association (APA)
Cona, Filippo& Zavaglia, Melissa& Astolfi, Laura& Babiloni, Fabio& Ursino, Mauro. 2009. Changes in EEG Power Spectral Density and Cortical Connectivity in Healthy and Tetraplegic Patients during a Motor Imagery Task. Computational Intelligence and Neuroscience،Vol. 2009, no. 2009, pp.1-12.
https://search.emarefa.net/detail/BIM-459837
Modern Language Association (MLA)
Cona, Filippo…[et al.]. Changes in EEG Power Spectral Density and Cortical Connectivity in Healthy and Tetraplegic Patients during a Motor Imagery Task. Computational Intelligence and Neuroscience No. 2009 (2009), pp.1-12.
https://search.emarefa.net/detail/BIM-459837
American Medical Association (AMA)
Cona, Filippo& Zavaglia, Melissa& Astolfi, Laura& Babiloni, Fabio& Ursino, Mauro. Changes in EEG Power Spectral Density and Cortical Connectivity in Healthy and Tetraplegic Patients during a Motor Imagery Task. Computational Intelligence and Neuroscience. 2009. Vol. 2009, no. 2009, pp.1-12.
https://search.emarefa.net/detail/BIM-459837
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-459837