Influence of the number of trials on evoked motor cortical activity in EEG recordings

Objective. Improvements in electroencephalography enable the study of the localization of active brain regions during motor tasks. Movement-related cortical potentials (MRCPs), and event-related desynchronization (ERD) and synchronization are the main motor-related cortical phenomena/neural correlat...

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Autores: Borras M, Romero S, Alonso JF, Bachiller A, Serna LY, Migliorelli C, Mananas MA
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Fundació Sant Joan de Déu
Repositorio:r-FSJD. Repositorio Institucional de Producción Científica de la Fundació Sant Joan de Déu
OAI Identifier:oai:fsjd.fundanetsuite.com:p21941
Acceso en línea:https://fsjd.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=21941
Access Level:acceso abierto
Palabra clave:electroencephalography (EEG)
motor-related activity
event-related desynchronization
synchronization (ERD
ERS)
LORETA
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spelling Influence of the number of trials on evoked motor cortical activity in EEG recordingsBorras MRomero SAlonso JFBachiller ASerna LYMigliorelli CMananas MAelectroencephalography (EEG)motor-related activityevent-related desynchronizationsynchronization (ERDERS)LORETAObjective. Improvements in electroencephalography enable the study of the localization of active brain regions during motor tasks. Movement-related cortical potentials (MRCPs), and event-related desynchronization (ERD) and synchronization are the main motor-related cortical phenomena/neural correlates observed when a movement is elicited. When assessing neurological diseases, averaging techniques are commonly applied to characterize motor related processes better. In this case, a large number of trials is required to obtain a motor potential that is representative enough of the subject's condition. This study aimed to assess the effect of a limited number of trials on motor-related activity corresponding to different upper limb movements (elbow flexion/extension, pronation/supination and hand open/close). Approach. An open dataset consisting on 15 healthy subjects was used for the analysis. A Monte Carlo simulation approach was applied to analyse, in a robust way, different typical time- and frequency-domain features, topography, and low-resolution electromagnetic tomography. Main results. Grand average potentials, and topographic and tomographic maps showed few differences when using fewer trials, but shifts in the localization of motor-related activity were found for several individuals. MRCP and beta ERD features were more robust to a limited number of trials, yielding differences lower than 20% for cases with 50 trials or more. Strong correlations between features were obtained for subsets above 50 trials. However, the inter-subject variability increased as the number of trials decreased. The elbow flexion/extension movement showed a more robust performance for a limited number of trials, both in population and in individual-based analysis. Significance. Our findings suggested that 50 trials can be an appropriate number to obtain stable motor-related features in terms of differences in the averaged motor features, correlation, and changes in topography and tomography.IOP Publishing Ltd2022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://fsjd.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=21941Journal of Neural EngineeringISSN: 17412560ISSNe: 17412552reponame:r-FSJD. Repositorio Institucional de Producción Científica de la Fundació Sant Joan de Déuinstname:Fundació Sant Joan de DéuInglésinfo:eu-repo/semantics/openAccessoai:fsjd.fundanetsuite.com:p219412026-05-27T12:37:41Z
dc.title.none.fl_str_mv Influence of the number of trials on evoked motor cortical activity in EEG recordings
title Influence of the number of trials on evoked motor cortical activity in EEG recordings
spellingShingle Influence of the number of trials on evoked motor cortical activity in EEG recordings
Borras M
electroencephalography (EEG)
motor-related activity
event-related desynchronization
synchronization (ERD
ERS)
LORETA
title_short Influence of the number of trials on evoked motor cortical activity in EEG recordings
title_full Influence of the number of trials on evoked motor cortical activity in EEG recordings
title_fullStr Influence of the number of trials on evoked motor cortical activity in EEG recordings
title_full_unstemmed Influence of the number of trials on evoked motor cortical activity in EEG recordings
title_sort Influence of the number of trials on evoked motor cortical activity in EEG recordings
dc.creator.none.fl_str_mv Borras M
Romero S
Alonso JF
Bachiller A
Serna LY
Migliorelli C
Mananas MA
author Borras M
author_facet Borras M
Romero S
Alonso JF
Bachiller A
Serna LY
Migliorelli C
Mananas MA
author_role author
author2 Romero S
Alonso JF
Bachiller A
Serna LY
Migliorelli C
Mananas MA
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv electroencephalography (EEG)
motor-related activity
event-related desynchronization
synchronization (ERD
ERS)
LORETA
topic electroencephalography (EEG)
motor-related activity
event-related desynchronization
synchronization (ERD
ERS)
LORETA
description Objective. Improvements in electroencephalography enable the study of the localization of active brain regions during motor tasks. Movement-related cortical potentials (MRCPs), and event-related desynchronization (ERD) and synchronization are the main motor-related cortical phenomena/neural correlates observed when a movement is elicited. When assessing neurological diseases, averaging techniques are commonly applied to characterize motor related processes better. In this case, a large number of trials is required to obtain a motor potential that is representative enough of the subject's condition. This study aimed to assess the effect of a limited number of trials on motor-related activity corresponding to different upper limb movements (elbow flexion/extension, pronation/supination and hand open/close). Approach. An open dataset consisting on 15 healthy subjects was used for the analysis. A Monte Carlo simulation approach was applied to analyse, in a robust way, different typical time- and frequency-domain features, topography, and low-resolution electromagnetic tomography. Main results. Grand average potentials, and topographic and tomographic maps showed few differences when using fewer trials, but shifts in the localization of motor-related activity were found for several individuals. MRCP and beta ERD features were more robust to a limited number of trials, yielding differences lower than 20% for cases with 50 trials or more. Strong correlations between features were obtained for subsets above 50 trials. However, the inter-subject variability increased as the number of trials decreased. The elbow flexion/extension movement showed a more robust performance for a limited number of trials, both in population and in individual-based analysis. Significance. Our findings suggested that 50 trials can be an appropriate number to obtain stable motor-related features in terms of differences in the averaged motor features, correlation, and changes in topography and tomography.
publishDate 2022
dc.date.none.fl_str_mv 2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://fsjd.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=21941
url https://fsjd.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=21941
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv IOP Publishing Ltd
publisher.none.fl_str_mv IOP Publishing Ltd
dc.source.none.fl_str_mv Journal of Neural Engineering
ISSN: 17412560
ISSNe: 17412552
reponame:r-FSJD. Repositorio Institucional de Producción Científica de la Fundació Sant Joan de Déu
instname:Fundació Sant Joan de Déu
instname_str Fundació Sant Joan de Déu
reponame_str r-FSJD. Repositorio Institucional de Producción Científica de la Fundació Sant Joan de Déu
collection r-FSJD. Repositorio Institucional de Producción Científica de la Fundació Sant Joan de Déu
repository.name.fl_str_mv
repository.mail.fl_str_mv
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