Effects of Different Re-referencing Methods on Spontaneously Generated Ear-EEG
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Choi, Soo-In | - |
dc.contributor.author | Hwang, Han-Jeong | - |
dc.date.accessioned | 2024-02-27T16:31:33Z | - |
dc.date.available | 2024-02-27T16:31:33Z | - |
dc.date.issued | 2019-08-07 | - |
dc.identifier.issn | 1662-4548 | - |
dc.identifier.issn | 1662-453X | - |
dc.identifier.uri | https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/28195 | - |
dc.description.abstract | In recent years, electroencephalography (EEG) measured around the ears, called ear-EEG, has been introduced to develop unobtrusive and ambulatory EEG-based applications. When measuring ear-EEGs, the availability of a reference site is restricted due to the miniaturized device structure, and therefore a reference electrode is generally placed near the recording electrodes. As the electrical brain activity recorded at a reference electrode closely placed to recording electrodes may significantly cancel or influence the brain activity recorded by the recording electrodes, an appropriate re-referencing method is often required to mitigate the impact of the reference brain activity. In this study, therefore, we systematically investigated the impact of different re-referencing methods on ear-EEGs spontaneously generated from endogenous paradigms. To this end, we used two ear-EEG datasets recorded behind both ears while subjects performed an alpha modulation task [eyes-closed (EC) and eyes-open (EO)] and two mental tasks [mental arithmetic (MA) and mental singing (MS)]. The measured ear-EEGs were independently re-referenced using five different methods: (i) all-mean, (ii) contralateral-mean, (iii) ipsilateral-mean, (iv) contralateral-bipolar, and (v) ipsilateral-bipolar. We investigated the changes in alpha power during EO and EC tasks, as well as event-related (de) synchronization (ERD/ERS) during MA and MS. To evaluate the effects of re-referencing methods on ear-EEGs, we estimated the signal-to-noise ratios (SNRs) of the two ear-EEG datasets, and assessed the classification performance of the two mental tasks (MA vs. MS). Overall patterns of changes in alpha power and ERD/ERS were similar among the five re-referencing methods, but the contralateral-mean method showed statistically higher SNRs than did the other methods for both ear-EEG datasets, except in the contralateral-bipolar method for the two mental tasks. In concordance with the SNR results, classification performance was also statistically higher for the contralateral-mean method than it was for the other re-referencing methods. The results suggest that employing contralateral mean information can be an efficient way to re-reference spontaneously generated ear-EEGs, thereby maximizing the reliability of ear-EEG-based applications in endogenous paradigms. | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | FRONTIERS MEDIA SA | - |
dc.title | Effects of Different Re-referencing Methods on Spontaneously Generated Ear-EEG | - |
dc.type | Article | - |
dc.publisher.location | 스위스 | - |
dc.identifier.doi | 10.3389/fnins.2019.00822 | - |
dc.identifier.wosid | 000479161700001 | - |
dc.identifier.bibliographicCitation | FRONTIERS IN NEUROSCIENCE, v.13 | - |
dc.citation.title | FRONTIERS IN NEUROSCIENCE | - |
dc.citation.volume | 13 | - |
dc.type.docType | Article | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Neurosciences & Neurology | - |
dc.relation.journalWebOfScienceCategory | Neurosciences | - |
dc.subject.keywordPlus | SINGLE-TRIAL EEG | - |
dc.subject.keywordPlus | AVERAGE REFERENCE | - |
dc.subject.keywordPlus | CLASSIFICATION | - |
dc.subject.keywordPlus | POTENTIALS | - |
dc.subject.keywordAuthor | electroencephalography (EEG) | - |
dc.subject.keywordAuthor | ear-EEG | - |
dc.subject.keywordAuthor | re-referencing | - |
dc.subject.keywordAuthor | mental task classification | - |
dc.subject.keywordAuthor | brain-computer interface (BCI) | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
350-27, Gumi-daero, Gumi-si, Gyeongsangbuk-do, Republic of Korea (39253)054-478-7170
COPYRIGHT 2020 Kumoh University All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.