Resolving the dynamics of EEG generators by multichannel recordings

Lilach, Avitan, Mina, Teicher and Abeles, Moshe (2008) Resolving the dynamics of EEG generators by multichannel recordings. Biological Cybernetics, 98 1: 49-59. doi:10.1007/s00422-007-0192-y


Author Lilach, Avitan
Mina, Teicher
Abeles, Moshe
Title Resolving the dynamics of EEG generators by multichannel recordings
Journal name Biological Cybernetics   Check publisher's open access policy
ISSN 0340-1200
1432-0770
Publication date 2008-01
Year available 2007
Sub-type Article (original research)
DOI 10.1007/s00422-007-0192-y
Volume 98
Issue 1
Start page 49
End page 59
Total pages 11
Place of publication Heidelberg, Germany
Publisher Springer
Language eng
Abstract The voltage recorded over the cortex (ECoG) or over the scalp (EEG) is generated by currents derived from many sources called “generators”. Different patterns and amplitudes are observed in aroused, sleepy, epileptic or other brain states. Differences in amplitude are generally attributed to differences in synchrony among generators. The degree of EEG synchrony is measured by the correlation between electrodes placed over different cortical regions. We present a new way to quantitatively assess the degree of synchronization of these generators via multichannel recordings. We illustrate how situations where there are several groups of generators with different inter-group and intra-group synchronies can be analyzed. Finally, we present a way to identify the organization of groups exhibiting topographic organization. Although the model presented here is highly simplified, several methods are based on averaging activity over increasingly larger areas. These types of measurements may be applied as well to EEG and ECoG recordings.
Keyword EEG
ECoG
ECoG
Synchrony
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Published online: 4 December 2007

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Brain Institute Publications
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Created: Thu, 20 Oct 2011, 20:43:05 EST by Lilach Avitan on behalf of Queensland Brain Institute