The effect of recording reference on EEG: Phase synchrony and coherence

Sanqing Hu, Matt Stead, Andrew B. Gardner, Gregory A. Worrell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

In [1], we developed two methods to automatically identify the contribution of the recording reference signal from multi-channel intracranial Electroencephalography (iEEG) recordings. In this study, we subtract the reference recording contribution to iEEG and obtain corrected iEEG. We then investigate three commonly used iEEG metrics: spectral power, phase synchrony, and magnitude squared coherence (MSC) for common referential iEEG, corrected iEEG and bipolar montage iEEG. We find significant differences among the three iEEG metrics, and are able to determine the contribution from the recording reference to each metric. Generally, reference signals with smaller amplitude yield lower phase synchrony and reference signals with larger amplitude increase phase synchrony. Reference signals with spectral peaks increase coherence. Reference signal with low power may have no significant impact on calculated coherence. Bipolar EEG usually yields small phase synchrony or MSC values and may obscure the actual phase synchrony or MSC values between two local sources.

Original languageEnglish (US)
Title of host publicationAdvances in Neural Networks - ISNN 2007 - 4th International Symposium on Neural Networks, ISNN 2007, Proceedings
Pages1273-1280
Number of pages8
EditionPART 2
StatePublished - Dec 24 2007
Event4th International Symposium on Neural Networks, ISNN 2007 - Nanjing, China
Duration: Jun 3 2007Jun 7 2007

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
NumberPART 2
Volume4492 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Other

Other4th International Symposium on Neural Networks, ISNN 2007
CountryChina
CityNanjing
Period6/3/076/7/07

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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    Hu, S., Stead, M., Gardner, A. B., & Worrell, G. A. (2007). The effect of recording reference on EEG: Phase synchrony and coherence. In Advances in Neural Networks - ISNN 2007 - 4th International Symposium on Neural Networks, ISNN 2007, Proceedings (PART 2 ed., pp. 1273-1280). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 4492 LNCS, No. PART 2).