Effect of Brain-to-Skull Conductivity Ratio on EEG Source Localization Accuracy
Joint Authors
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-04-17
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
The goal of this study was to investigate the influence of the brain-to-skull conductivity ratio (BSCR) on EEG source localization accuracy.
In this study, we evaluated four BSCRs: 15, 20, 25, and 80, which were mainly discussed according to the literature.
The scalp EEG signals were generated by BSCR-related forward computation for each cortical dipole source.
Then, for each scalp EEG measurement, the source reconstruction was performed to identify the estimated dipole sources by the actual BSCR and the misspecified BSCRs.
The estimated dipole sources were compared with the simulated dipole sources to evaluate EEG source localization accuracy.
In the case of considering noise-free EEG measurements, the mean localization errors were approximately equal to zero when using actual BSCR.
The misspecified BSCRs resulted in substantial localization errors which ranged from 2 to 16 mm.
When considering noise-contaminated EEG measurements, the mean localization errors ranged from 8 to 18 mm despite the BSCRs used in the inverse calculation.
The present results suggest that the localization accuracy is sensitive to the BSCR in EEG source reconstruction, and the source activity can be accurately localized when the actual BSCR and the EEG scalp signals with high signal-to-noise ratio (SNR) are used.
American Psychological Association (APA)
Wang, Gang& Ren, Doutian. 2013. Effect of Brain-to-Skull Conductivity Ratio on EEG Source Localization Accuracy. BioMed Research International،Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-1030561
Modern Language Association (MLA)
Wang, Gang& Ren, Doutian. Effect of Brain-to-Skull Conductivity Ratio on EEG Source Localization Accuracy. BioMed Research International No. 2013 (2013), pp.1-10.
https://search.emarefa.net/detail/BIM-1030561
American Medical Association (AMA)
Wang, Gang& Ren, Doutian. Effect of Brain-to-Skull Conductivity Ratio on EEG Source Localization Accuracy. BioMed Research International. 2013. Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-1030561
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1030561