Properties of functional brain networks correlate with frequency of psychogenic non-epileptic seizures.
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State: Public
Version: author
Serval ID
serval:BIB_027D470FA64D
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Properties of functional brain networks correlate with frequency of psychogenic non-epileptic seizures.
Journal
Frontiers in Human Neuroscience
ISSN
1662-5161 (Electronic)
ISSN-L
1662-5161
Publication state
Published
Issued date
2012
Peer-reviewed
Oui
Volume
6
Number
335
Pages
1-13
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Publication Status: ppublish
Abstract
Abnormalities in the topology of brain networks may be an important feature and etiological factor for psychogenic non-epileptic seizures (PNES). To explore this possibility, we applied a graph theoretical approach to functional networks based on resting state EEGs from 13 PNES patients and 13 age- and gender-matched controls. The networks were extracted from Laplacian-transformed time-series by a cross-correlation method. PNES patients showed close to normal local and global connectivity and small-world structure, estimated with clustering coefficient, modularity, global efficiency, and small-worldness (SW) metrics, respectively. Yet the number of PNES attacks per month correlated with a weakness of local connectedness and a skewed balance between local and global connectedness quantified with SW, all in EEG alpha band. In beta band, patients demonstrated above-normal resiliency, measured with assortativity coefficient, which also correlated with the frequency of PNES attacks. This interictal EEG phenotype may help improve differentiation between PNES and epilepsy. The results also suggest that local connectivity could be a target for therapeutic interventions in PNES. Selective modulation (strengthening) of local connectivity might improve the skewed balance between local and global connectivity and so prevent PNES events.
Pubmed
Web of science
Open Access
Yes
Create date
17/01/2013 18:12
Last modification date
20/08/2019 12:24