Mirror movements: a simple algorithm for mirror activity signal processing and normative values
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10451/56743 |
Resumo: | © 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
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Mirror movements: a simple algorithm for mirror activity signal processing and normative valuesEMGMirror activityMirror movementsNormative valuesSignal processing© 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).Mirror activity is an involuntary activation of a muscle when the respective contralateral muscle is contracting. This phenomenon has been described primarily in children and in disease states, and, more recently, also in healthy adults. Different ways of assessing mirror activity have been described. In this work we propose a simple protocol for quantifying the amount of mirror activity during a brief isolated full force isometric contraction of a given muscle. The signal was analyzed by a custom-built algorithm that detects the beginning and the end of muscle contraction. The amount of EMG signal on the mirror muscle in relation to the amount of EMG signal of the active muscle is then calculated. We studied 57 right-handed healthy subjects. Mirror activity was evaluated in the Abductor digiti minimi (ADM) and Tibialis anterior (TA) muscles during a 2-3 seconds full force isometric contraction. The intensity of mirror movement was represented as a percentage of the signal from maximal voluntary contraction. The performance of the algorithm for the detection of the beginning of muscle contraction was very good, when compared to 2 human operators. Intraclass correlation coefficient was excellent (0.998). The Bland-Altman plots showed similar performances of the algorithm and the human operators. We found a significant correlation of mirror activity with intensity and age. There was significantly more intense mirror activity in the left limbs (non-dominant) when compared to the right limbs. The upper limits of normality for mirror EMG signal was 27.4% for right ADM, 15.4% for left ADM, 10.4% for right TA and 2.1% for left TA. This simple protocol allows for an objective measurement of the amount of mirror activity. We propose this technique for investigation of neurological disorders.This work was funded by the project “Spinal circuitry in Motor Neuron Disease: Changes in Spinal and Corticospinal Mechanisms in Amyotrophic Lateral Sclerosis and its variants” (sponsored by Biogen Inc).ElsevierRepositório da Universidade de LisboaCastro, JoséPedrosa, TomásCastro, IsabelSwash, MichaelCarvalho, Mamede2023-03-21T12:19:08Z20232023-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10451/56743engNeurosci Lett. 2023 Mar 13;1371860304-394010.1016/j.neulet.2023.1371861872-7972info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-08T17:04:37Zoai:repositorio.ul.pt:10451/56743Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:07:16.283180Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Mirror movements: a simple algorithm for mirror activity signal processing and normative values |
title |
Mirror movements: a simple algorithm for mirror activity signal processing and normative values |
spellingShingle |
Mirror movements: a simple algorithm for mirror activity signal processing and normative values Castro, José EMG Mirror activity Mirror movements Normative values Signal processing |
title_short |
Mirror movements: a simple algorithm for mirror activity signal processing and normative values |
title_full |
Mirror movements: a simple algorithm for mirror activity signal processing and normative values |
title_fullStr |
Mirror movements: a simple algorithm for mirror activity signal processing and normative values |
title_full_unstemmed |
Mirror movements: a simple algorithm for mirror activity signal processing and normative values |
title_sort |
Mirror movements: a simple algorithm for mirror activity signal processing and normative values |
author |
Castro, José |
author_facet |
Castro, José Pedrosa, Tomás Castro, Isabel Swash, Michael Carvalho, Mamede |
author_role |
author |
author2 |
Pedrosa, Tomás Castro, Isabel Swash, Michael Carvalho, Mamede |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Repositório da Universidade de Lisboa |
dc.contributor.author.fl_str_mv |
Castro, José Pedrosa, Tomás Castro, Isabel Swash, Michael Carvalho, Mamede |
dc.subject.por.fl_str_mv |
EMG Mirror activity Mirror movements Normative values Signal processing |
topic |
EMG Mirror activity Mirror movements Normative values Signal processing |
description |
© 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-03-21T12:19:08Z 2023 2023-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10451/56743 |
url |
http://hdl.handle.net/10451/56743 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Neurosci Lett. 2023 Mar 13;137186 0304-3940 10.1016/j.neulet.2023.137186 1872-7972 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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|
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1799134626403319808 |