Extent of cortical generators visible on the scalp: Effect of a subdural grid

Autores
Von Ellenrieder, Nicolás; Beltrachini, Leandro; Muravchik, Carlos Horacio; Gotman, Jean
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The effect of the non-conducting substrate of a subdural grid on the scalp electric potential distribution is studied through simulations. Using a detailed head model and the finite element method we show that the governing physics equations predict an important attenuation in the scalp potential for generators located under the grid, and an amplification for generators located under holes in the skull filled with conductive media. These effects are spatially localized and do not cancel each other. A 4×8cm grid can produce attenuations of 2 to 3 times, and an 8×8cm grid attenuation of up to 8 times. As a consequence, when there is no subdural grid, generators of 4 to 8cm 2 produce scalp potentials of the same maximum amplitude as generators of 10 to 20cm 2 under the center of a subdural grid. This means that the minimum cortical extents necessary to produce visible scalp activity determined from simultaneous scalp and subdural recordings can be overestimations.
Fil: Von Ellenrieder, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Electrotecnia. Laboratorio de Electrónica Industrial, Control e Instrumentación; Argentina. McGill University. Montreal Neurological Institute and Hospital; Canadá
Fil: Beltrachini, Leandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. University of Sheffield; Reino Unido
Fil: Muravchik, Carlos Horacio. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Electrotecnia. Laboratorio de Electrónica Industrial, Control e Instrumentación; Argentina
Fil: Gotman, Jean. McGill University. Montreal Neurological Institute and Hospital; Canadá
Materia
Electrocorticography
Finite Element Method
Scalp Eeg
Subdural Grid
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/78337
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/78337
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Extent of cortical generators visible on the scalp: Effect of a subdural gridVon Ellenrieder, NicolásBeltrachini, LeandroMuravchik, Carlos HoracioGotman, JeanElectrocorticographyFinite Element MethodScalp EegSubdural Gridhttps://purl.org/becyt/ford/2.2https://purl.org/becyt/ford/2The effect of the non-conducting substrate of a subdural grid on the scalp electric potential distribution is studied through simulations. Using a detailed head model and the finite element method we show that the governing physics equations predict an important attenuation in the scalp potential for generators located under the grid, and an amplification for generators located under holes in the skull filled with conductive media. These effects are spatially localized and do not cancel each other. A 4×8cm grid can produce attenuations of 2 to 3 times, and an 8×8cm grid attenuation of up to 8 times. As a consequence, when there is no subdural grid, generators of 4 to 8cm 2 produce scalp potentials of the same maximum amplitude as generators of 10 to 20cm 2 under the center of a subdural grid. This means that the minimum cortical extents necessary to produce visible scalp activity determined from simultaneous scalp and subdural recordings can be overestimations.Fil: Von Ellenrieder, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Electrotecnia. Laboratorio de Electrónica Industrial, Control e Instrumentación; Argentina. McGill University. Montreal Neurological Institute and Hospital; CanadáFil: Beltrachini, Leandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. University of Sheffield; Reino UnidoFil: Muravchik, Carlos Horacio. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Electrotecnia. Laboratorio de Electrónica Industrial, Control e Instrumentación; ArgentinaFil: Gotman, Jean. McGill University. Montreal Neurological Institute and Hospital; CanadáAcademic Press Inc Elsevier Science2014-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/78337Von Ellenrieder, Nicolás; Beltrachini, Leandro; Muravchik, Carlos Horacio; Gotman, Jean; Extent of cortical generators visible on the scalp: Effect of a subdural grid; Academic Press Inc Elsevier Science; Neuroimage; 101; 11-2014; 787-7951053-8119CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.neuroimage.2014.08.009info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1053811914006594info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:25:11Zoai:ri.conicet.gov.ar:11336/78337instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:25:12.18CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Extent of cortical generators visible on the scalp: Effect of a subdural grid
title Extent of cortical generators visible on the scalp: Effect of a subdural grid
spellingShingle Extent of cortical generators visible on the scalp: Effect of a subdural grid
Von Ellenrieder, Nicolás
Electrocorticography
Finite Element Method
Scalp Eeg
Subdural Grid
title_short Extent of cortical generators visible on the scalp: Effect of a subdural grid
title_full Extent of cortical generators visible on the scalp: Effect of a subdural grid
title_fullStr Extent of cortical generators visible on the scalp: Effect of a subdural grid
title_full_unstemmed Extent of cortical generators visible on the scalp: Effect of a subdural grid
title_sort Extent of cortical generators visible on the scalp: Effect of a subdural grid
dc.creator.none.fl_str_mv Von Ellenrieder, Nicolás
Beltrachini, Leandro
Muravchik, Carlos Horacio
Gotman, Jean
author Von Ellenrieder, Nicolás
author_facet Von Ellenrieder, Nicolás
Beltrachini, Leandro
Muravchik, Carlos Horacio
Gotman, Jean
author_role author
author2 Beltrachini, Leandro
Muravchik, Carlos Horacio
Gotman, Jean
author2_role author
author
author
dc.subject.none.fl_str_mv Electrocorticography
Finite Element Method
Scalp Eeg
Subdural Grid
topic Electrocorticography
Finite Element Method
Scalp Eeg
Subdural Grid
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.2
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The effect of the non-conducting substrate of a subdural grid on the scalp electric potential distribution is studied through simulations. Using a detailed head model and the finite element method we show that the governing physics equations predict an important attenuation in the scalp potential for generators located under the grid, and an amplification for generators located under holes in the skull filled with conductive media. These effects are spatially localized and do not cancel each other. A 4×8cm grid can produce attenuations of 2 to 3 times, and an 8×8cm grid attenuation of up to 8 times. As a consequence, when there is no subdural grid, generators of 4 to 8cm 2 produce scalp potentials of the same maximum amplitude as generators of 10 to 20cm 2 under the center of a subdural grid. This means that the minimum cortical extents necessary to produce visible scalp activity determined from simultaneous scalp and subdural recordings can be overestimations.
Fil: Von Ellenrieder, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Electrotecnia. Laboratorio de Electrónica Industrial, Control e Instrumentación; Argentina. McGill University. Montreal Neurological Institute and Hospital; Canadá
Fil: Beltrachini, Leandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. University of Sheffield; Reino Unido
Fil: Muravchik, Carlos Horacio. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Electrotecnia. Laboratorio de Electrónica Industrial, Control e Instrumentación; Argentina
Fil: Gotman, Jean. McGill University. Montreal Neurological Institute and Hospital; Canadá
description The effect of the non-conducting substrate of a subdural grid on the scalp electric potential distribution is studied through simulations. Using a detailed head model and the finite element method we show that the governing physics equations predict an important attenuation in the scalp potential for generators located under the grid, and an amplification for generators located under holes in the skull filled with conductive media. These effects are spatially localized and do not cancel each other. A 4×8cm grid can produce attenuations of 2 to 3 times, and an 8×8cm grid attenuation of up to 8 times. As a consequence, when there is no subdural grid, generators of 4 to 8cm 2 produce scalp potentials of the same maximum amplitude as generators of 10 to 20cm 2 under the center of a subdural grid. This means that the minimum cortical extents necessary to produce visible scalp activity determined from simultaneous scalp and subdural recordings can be overestimations.
publishDate 2014
dc.date.none.fl_str_mv 2014-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/78337
Von Ellenrieder, Nicolás; Beltrachini, Leandro; Muravchik, Carlos Horacio; Gotman, Jean; Extent of cortical generators visible on the scalp: Effect of a subdural grid; Academic Press Inc Elsevier Science; Neuroimage; 101; 11-2014; 787-795
1053-8119
CONICET Digital
CONICET
url http://hdl.handle.net/11336/78337
identifier_str_mv Von Ellenrieder, Nicolás; Beltrachini, Leandro; Muravchik, Carlos Horacio; Gotman, Jean; Extent of cortical generators visible on the scalp: Effect of a subdural grid; Academic Press Inc Elsevier Science; Neuroimage; 101; 11-2014; 787-795
1053-8119
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.neuroimage.2014.08.009
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1053811914006594
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Academic Press Inc Elsevier Science
publisher.none.fl_str_mv Academic Press Inc Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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