Cited by 810Blind Source Separation TechniquesEEG and Brain-Computer InterfacesTensor decomposition and applications

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Independent EEG Sources Are Dipolar

Open access
Delorme, Arnaud, Palmer, Jason, Onton, Julie, Oostenveld, Robert, Makeig, Scott·2012·PLoS ONE

Abstract

Independent component analysis (ICA) and blind source separation (BSS) methods are increasingly used to separate individual brain and non-brain source signals mixed by volume conduction in electroencephalographic (EEG) and other electrophysiological recordings. We compared results of decomposing thirteen 71-channel human scalp EEG datasets by 22 ICA and BSS algorithms, assessing the pairwise mutual information (PMI) in scalp channel pairs, the remaining PMI in component pairs, the overall mutual information reduction (MIR) effected by each decomposition, and decomposition 'dipolarity' defined as the number of component scalp maps matching the projection of a single equivalent dipole with less than a given residual variance. The least well-performing algorithm was principal component analysis (PCA); best performing were AMICA and other likelihood/mutual information based ICA methods. Though these and other commonly-used decomposition methods returned many similar components, across 18 ICA/BSS algorithms mean dipolarity varied linearly with both MIR and with PMI remaining between the resulting component time courses, a result compatible with an interpretation of many maximally independent EEG components as being volume-conducted projections of partially-synchronous local cortical field activity within single compact cortical domains. To encourage further method comparisons, the data and software used to prepare the results have been made available (http://sccn.ucsd.edu/wiki/BSSComparison).

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  1. G Gómez-Herrero, 2008, Gómez-Herrero G, Atienza M, Egiazarian K, Cantero JL., Neuroimage, 43, 497
  2. Z Akalin Acar, 2011, Adaptive mixture independent component analysis and source localization in epilepsy., IEEE EMBC

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Metadata

Authors
Delorme, A., Palmer, J., Onton, J., Oostenveld, R., & Makeig, S.
Affiliations
  • University of California San Diego (US)
  • Radboud University Nijmegen (NL)
Venue
PLoS ONE
Published
2012-02-15
Volume
7
Issue
2
Pages
e30135
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2171746332
Cited by
810
References
57
Citations by year
2026: 34 · 2025: 47 · 2024: 50 · 2023: 58 · 2022: 80 · 2021: 76 · 2020: 80 · 2019: 67 · 2018: 68 · 2017: 56 · 2016: 50 · 2015: 48 · 2014: 48 · 2013: 32 · 2012: 15
FWCI
58.25
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion, cc-by)
  • HAL (submittedVersion, other-oa)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Science Foundation (0613595)
  • National Institute of Mental Health (NS047293)
  • National Institute of Neurological Disorders and Stroke (R01-NS047293-01A1, R01NS047293)
Topics
  • Physical Sciences › Computer Science › Signal Processing › Blind Source Separation Techniques
  • Life Sciences › Neuroscience › Cognitive Neuroscience › EEG and Brain-Computer Interfaces
  • Physical Sciences › Mathematics › Computational Mathematics › Tensor decomposition and applications
Keywords
independent component analysis, blind source separation, EEG source localization, dipole modeling, volume conduction, mutual information, principal component analysis, scalp EEG
MeSH terms
Algorithms, Brain, Brain Mapping, Computer Simulation, Electroencephalography, Humans, Scalp, Signal Processing, Computer-Assisted, Principal Component Analysis

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