Mirror movements: a simple algorithm for mirror activity signal processing and normative values

Detalhes bibliográficos
Autor(a) principal: Castro, José
Data de Publicação: 2023
Outros Autores: Pedrosa, Tomás, Castro, Isabel, Swash, Michael, Carvalho, Mamede
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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spelling 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
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
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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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