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dc.contributor.author
Von Ellenrieder, Nicolás
dc.contributor.author
Beltrachini, Leandro
dc.contributor.author
Muravchik, Carlos Horacio
dc.contributor.author
Gotman, Jean
dc.date.available
2019-06-14T16:28:36Z
dc.date.issued
2014-11
dc.identifier.citation
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
dc.identifier.issn
1053-8119
dc.identifier.uri
http://hdl.handle.net/11336/78337
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Academic Press Inc Elsevier Science
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Electrocorticography
dc.subject
Finite Element Method
dc.subject
Scalp Eeg
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Subdural Grid
dc.subject.classification
Ingeniería de Sistemas y Comunicaciones
dc.subject.classification
Ingeniería Eléctrica, Ingeniería Electrónica e Ingeniería de la Información
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INGENIERÍAS Y TECNOLOGÍAS
dc.title
Extent of cortical generators visible on the scalp: Effect of a subdural grid
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-06-11T15:17:01Z
dc.journal.volume
101
dc.journal.pagination
787-795
dc.journal.pais
Estados Unidos
dc.description.fil
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
dc.description.fil
Fil: Beltrachini, Leandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. University of Sheffield; Reino Unido
dc.description.fil
Fil: Muravchik, Carlos Horacio. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Electrotecnia. Laboratorio de Electrónica Industrial, Control e Instrumentación; Argentina
dc.description.fil
Fil: Gotman, Jean. McGill University. Montreal Neurological Institute and Hospital; Canadá
dc.journal.title
Neuroimage
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.neuroimage.2014.08.009
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1053811914006594
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