Cited by 149EEG and Brain-Computer InterfacesEpilepsy research and treatmentDirection-of-Arrival Estimation Techniques

Effect of EEG electrode number on epileptic source localization in pediatric patients

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Sohrabpour, Abbas, Lu, Yunfeng, Kankirawatana, Pongkiat, Blount, Jeffrey, Kim, Hyunmi, He, Bin·2015·Clinical Neurophysiology

Abstract

Objective To investigate the relationship between EEG source localization and the number of scalp EEG recording channels.Methods 128 EEG channel recordings of 5 pediatric patients with medically intractable partial epilepsy were used to perform source localization of interictal spikes. The results were compared with surgical resection and intracranial recordings. Various electrode configurations were tested and a series of computer simulations based on a realistic head boundary element model were also performed in order to further validate the clinical findings.Results The improvement seen in source localization substantially decreases as the number of electrodes increases. This finding was evaluated using the surgical resection, intracranial recordings and computer simulation. It was also shown in the simulation that increasing the electrode numbers could remedy the localization error of deep sources. A plateauing effect was seen in deep and superficial sources with further increasing the electrode number.Conclusion The source localization is improved when electrode numbers increase, but the absolute improvement in accuracy decreases with increasing electrode number.Significance Increasing the electrode number helps decrease localization error and thus can more ably assist the physician to better plan for surgical procedures.

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Crossref · 10.1016/j.clinph.2014.05.038

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  1. Picton T Lins O Scherg M The recording and analysis of event-related Boller F Grafman J Handbook of Neurophysiology Amsterdam Elsevier 1995 3 73

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Authors
Sohrabpour, A., Lu, Y., Kankirawatana, P., Blount, J., Kim, H., & He, B.
Affiliations
  • University of Minnesota (US)
  • University of Alabama at Birmingham (US)
Corresponding author
He, Bin
Venue
Clinical Neurophysiology
Publisher
Elsevier BV
Published
2015-03
Volume
126
Issue
3
Pages
472-480
ISSN
1388-2457 (ISSN-L)
OpenAlex
W2020479538
Cited by
149
References
65
Citations by year
2026: 2 · 2025: 14 · 2024: 9 · 2023: 29 · 2022: 13 · 2021: 16 · 2020: 10 · 2019: 19 · 2018: 8 · 2017: 9 · 2016: 10 · 2015: 7 · 2014: 2 · 2012: 1
FWCI
5.21
Type
journal article
Language
en
Open access
Locations
  • Clinical Neurophysiology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • NIH (EB006433, EY023101, HL117664)
  • NSF
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › EEG and Brain-Computer Interfaces
  • Health Sciences › Medicine › Psychiatry and Mental health › Epilepsy research and treatment
  • Physical Sciences › Computer Science › Signal Processing › Direction-of-Arrival Estimation Techniques
Keywords
EEG source localization, electrode number, pediatric epilepsy, interictal spikes, electrode configuration, surgical planning, intracranial recordings
MeSH terms
Adolescent, Brain, Brain Mapping, Child, Child, Preschool, Computer Simulation, Electrodes, Electroencephalography, Epilepsies, Partial, Female, Humans, Male

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