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• W2011044564 endingPage "e105041" @default.
• W2011044564 startingPage "e105041" @default.
• W2011044564 abstract "The recent past years have seen a noticeable increase of interest for electroencephalography (EEG) to analyze functional connectivity through brain sources reconstructed from scalp signals. Although considerable advances have been done both on the recording and analysis of EEG signals, a number of methodological questions are still open regarding the optimal way to process the data in order to identify brain networks. In this paper, we analyze the impact of three factors that intervene in this processing: i) the number of scalp electrodes, ii) the combination between the algorithm used to solve the EEG inverse problem and the algorithm used to measure the functional connectivity and iii) the frequency bands retained to estimate the functional connectivity among neocortical sources. Using High-Resolution (hr) EEG recordings in healthy volunteers, we evaluated these factors on evoked responses during picture recognition and naming task. The main reason for selection this task is that a solid literature background is available about involved brain networks (ground truth). From this a priori information, we propose a performance criterion based on the number of connections identified in the regions of interest (ROI) that belong to potentially activated networks. Our results show that the three studied factors have a dramatic impact on the final result (the identified network in the source space) as strong discrepancies were evidenced depending on the methods used. They also suggest that the combination of weighted Minimum Norm Estimator (wMNE) and the Phase Synchronization (PS) methods applied on High-Resolution EEG in beta/gamma bands provides the best performance in term of topological distance between the identified network and the expected network in the above-mentioned cognitive task." @default.
• W2011044564 created "2016-06-24" @default.
• W2011044564 creator A5000482854 @default.
• W2011044564 creator A5042819031 @default.
• W2011044564 creator A5057990559 @default.
• W2011044564 creator A5075239943 @default.
• W2011044564 creator A5088812873 @default.
• W2011044564 date "2014-08-12" @default.
• W2011044564 modified "2023-10-13" @default.
• W2011044564 title "EEG Source Connectivity Analysis: From Dense Array Recordings to Brain Networks" @default.
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