Behaviour of postural adjustments during stand-to-sit in subjects with stroke

Detalhes bibliográficos
Autor(a) principal: Peixoto, Marta Regina Moreira
Data de Publicação: 2021
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.22/19741
Resumo: When performing the transition from standing to sitting, prior to beginning the task, there should be a variation in the level of activity of the postural muscles. This modification presupposes the maintenance of safety and efficiency during the executation of this postural transition, through early postural adjustments (EPAs) and anticipatory postural adjustments (APAs). In individuals after a stroke, there is na impairment of postural control and the characterization of these adjustments still needs to be investigated. To analyze the behaviour of postural adjustments in the transition from standing to sitting in individuals after a stroke. A cross-sectional observational study was carried out with 18 individuals after a single stroke in the middle cerebral artery territory. They were asked to perform the sequence from standing to sitting, and the timing of variation in activity of the soleus, medial gastrocnemius, anterior tibial, rectus femoris, bíceps femoris and gluteus maximus of the ipsilesional (IPSI) and contralesional (CONTRA) limbs was recorded using surface electromyography. For statistical analysis, descriptive statistics was used, using the median, 25th percentile and 75th percentile, to analyze the activity of each muscle, and the Wilcoxon test was used to compare limbs, with a significance level of 0.05. There were no variations in muscle activity in the temporal window corresponding to early postural adjustments. Regarding the variation in the temporal window of APAs, it was found most individuals exhibited, for most muscles undr analysis, a variation in the direction of activation, with statistically significant diferences being found between the IPSI and CONTRA limbs in the anterior tibialis [6 (-61; 35)] and [27 (-19; 44)], respectively (p=0.025); soleus [26 (39; 41)] respectively (p<0.001) and rectus femoris [17.5 (-43; 40)], respectively (p=0.001). In this study, it was not possible to observe variation in the muscular activity of the postural muscles, in the temporal line of early postural adjustments. In the temporal line of anticipatory postural adjustments, although there was variation in muscle activity, it occured after begining of movement and with muscle activation behavior in all mucles. The IPSI limb muscles varied their activity earlier than the CONTRA limb muscles, except for gluteus maximus.
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spelling Behaviour of postural adjustments during stand-to-sit in subjects with strokeAnticipatory postural adjustmentsEarly postural adjustmentsStrokeStand-to-sitWhen performing the transition from standing to sitting, prior to beginning the task, there should be a variation in the level of activity of the postural muscles. This modification presupposes the maintenance of safety and efficiency during the executation of this postural transition, through early postural adjustments (EPAs) and anticipatory postural adjustments (APAs). In individuals after a stroke, there is na impairment of postural control and the characterization of these adjustments still needs to be investigated. To analyze the behaviour of postural adjustments in the transition from standing to sitting in individuals after a stroke. A cross-sectional observational study was carried out with 18 individuals after a single stroke in the middle cerebral artery territory. They were asked to perform the sequence from standing to sitting, and the timing of variation in activity of the soleus, medial gastrocnemius, anterior tibial, rectus femoris, bíceps femoris and gluteus maximus of the ipsilesional (IPSI) and contralesional (CONTRA) limbs was recorded using surface electromyography. For statistical analysis, descriptive statistics was used, using the median, 25th percentile and 75th percentile, to analyze the activity of each muscle, and the Wilcoxon test was used to compare limbs, with a significance level of 0.05. There were no variations in muscle activity in the temporal window corresponding to early postural adjustments. Regarding the variation in the temporal window of APAs, it was found most individuals exhibited, for most muscles undr analysis, a variation in the direction of activation, with statistically significant diferences being found between the IPSI and CONTRA limbs in the anterior tibialis [6 (-61; 35)] and [27 (-19; 44)], respectively (p=0.025); soleus [26 (39; 41)] respectively (p<0.001) and rectus femoris [17.5 (-43; 40)], respectively (p=0.001). In this study, it was not possible to observe variation in the muscular activity of the postural muscles, in the temporal line of early postural adjustments. In the temporal line of anticipatory postural adjustments, although there was variation in muscle activity, it occured after begining of movement and with muscle activation behavior in all mucles. The IPSI limb muscles varied their activity earlier than the CONTRA limb muscles, except for gluteus maximus.Silva, Maria Augusta Ferreira daSilva, Cláudia CostaRepositório Científico do Instituto Politécnico do PortoPeixoto, Marta Regina Moreira2021-12-102024-12-10T00:00:00Z2021-12-10T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.22/19741TID:202900169engmetadata only accessinfo: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:RCAAP2023-03-13T13:14:37Zoai:recipp.ipp.pt:10400.22/19741Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:39:48.981765Repositório 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 Behaviour of postural adjustments during stand-to-sit in subjects with stroke
title Behaviour of postural adjustments during stand-to-sit in subjects with stroke
spellingShingle Behaviour of postural adjustments during stand-to-sit in subjects with stroke
Peixoto, Marta Regina Moreira
Anticipatory postural adjustments
Early postural adjustments
Stroke
Stand-to-sit
title_short Behaviour of postural adjustments during stand-to-sit in subjects with stroke
title_full Behaviour of postural adjustments during stand-to-sit in subjects with stroke
title_fullStr Behaviour of postural adjustments during stand-to-sit in subjects with stroke
title_full_unstemmed Behaviour of postural adjustments during stand-to-sit in subjects with stroke
title_sort Behaviour of postural adjustments during stand-to-sit in subjects with stroke
author Peixoto, Marta Regina Moreira
author_facet Peixoto, Marta Regina Moreira
author_role author
dc.contributor.none.fl_str_mv Silva, Maria Augusta Ferreira da
Silva, Cláudia Costa
Repositório Científico do Instituto Politécnico do Porto
dc.contributor.author.fl_str_mv Peixoto, Marta Regina Moreira
dc.subject.por.fl_str_mv Anticipatory postural adjustments
Early postural adjustments
Stroke
Stand-to-sit
topic Anticipatory postural adjustments
Early postural adjustments
Stroke
Stand-to-sit
description When performing the transition from standing to sitting, prior to beginning the task, there should be a variation in the level of activity of the postural muscles. This modification presupposes the maintenance of safety and efficiency during the executation of this postural transition, through early postural adjustments (EPAs) and anticipatory postural adjustments (APAs). In individuals after a stroke, there is na impairment of postural control and the characterization of these adjustments still needs to be investigated. To analyze the behaviour of postural adjustments in the transition from standing to sitting in individuals after a stroke. A cross-sectional observational study was carried out with 18 individuals after a single stroke in the middle cerebral artery territory. They were asked to perform the sequence from standing to sitting, and the timing of variation in activity of the soleus, medial gastrocnemius, anterior tibial, rectus femoris, bíceps femoris and gluteus maximus of the ipsilesional (IPSI) and contralesional (CONTRA) limbs was recorded using surface electromyography. For statistical analysis, descriptive statistics was used, using the median, 25th percentile and 75th percentile, to analyze the activity of each muscle, and the Wilcoxon test was used to compare limbs, with a significance level of 0.05. There were no variations in muscle activity in the temporal window corresponding to early postural adjustments. Regarding the variation in the temporal window of APAs, it was found most individuals exhibited, for most muscles undr analysis, a variation in the direction of activation, with statistically significant diferences being found between the IPSI and CONTRA limbs in the anterior tibialis [6 (-61; 35)] and [27 (-19; 44)], respectively (p=0.025); soleus [26 (39; 41)] respectively (p<0.001) and rectus femoris [17.5 (-43; 40)], respectively (p=0.001). In this study, it was not possible to observe variation in the muscular activity of the postural muscles, in the temporal line of early postural adjustments. In the temporal line of anticipatory postural adjustments, although there was variation in muscle activity, it occured after begining of movement and with muscle activation behavior in all mucles. The IPSI limb muscles varied their activity earlier than the CONTRA limb muscles, except for gluteus maximus.
publishDate 2021
dc.date.none.fl_str_mv 2021-12-10
2021-12-10T00:00:00Z
2024-12-10T00:00:00Z
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