Short and Medium Latency Responses in Participants With Chronic Ankle Instability
Autor(a) principal: | |
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Data de Publicação: | 2018 |
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/10400.22/14918 |
Resumo: | Context: The determinant role of medium latency responses (MLRs) during compensatory postural adjustments in postural stability and the lack of clarity about the mechanisms behind chronic ankle instability (CAI) sustain the hypothesis that these postural responses are impaired in this condition. However, to the best of our knowledge, no authors have assessed MLRs in patients with CAI; most of the research regarding compensatory postural adjustments has been directed at the timing of short latency responses (SLRs). Objective: To evaluate bilateral compensatory postural responses, including SLRs and MLRs, in response to a unilateral simulated ankle-sprain mechanism in participants with CAI. Design: Case-control study. Setting: Laboratory. Patients or Other Participants: Twenty-four participants with CAI and 20 controls. Intervention(s): Bilateral electromyography of the peroneus longus (PL), peroneus brevis, tibialis anterior (TA), and soleus (SOL) muscles was collected during a unilateral sudden-inversion perturbation (30°). Main Outcome Measure(s): Muscle-onset activations and magnitudes of SLRs and MLRs in the support and perturbed positions. Results: Participants with CAI showed (1) later-onset activation of the TA and SOL in the uninjured limb and bilateral decreases in the magnitude of the TA MLR in the support position, (2) increased magnitude of the PL MLR in the uninjured limb in the support and perturbed positions, and (3) increased magnitude of the PL SLR and MLR in the injured limb in the perturbed position. Conclusions: Chronic ankle instability was associated with later TA and SOL activation in the uninjured limb and bilaterally decreased magnitude of the TA MLR in the support position. |
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Short and Medium Latency Responses in Participants With Chronic Ankle InstabilityAnkleElectromyographyJoint InstabilityMuscle, SkeletalPostural BalanceContext: The determinant role of medium latency responses (MLRs) during compensatory postural adjustments in postural stability and the lack of clarity about the mechanisms behind chronic ankle instability (CAI) sustain the hypothesis that these postural responses are impaired in this condition. However, to the best of our knowledge, no authors have assessed MLRs in patients with CAI; most of the research regarding compensatory postural adjustments has been directed at the timing of short latency responses (SLRs). Objective: To evaluate bilateral compensatory postural responses, including SLRs and MLRs, in response to a unilateral simulated ankle-sprain mechanism in participants with CAI. Design: Case-control study. Setting: Laboratory. Patients or Other Participants: Twenty-four participants with CAI and 20 controls. Intervention(s): Bilateral electromyography of the peroneus longus (PL), peroneus brevis, tibialis anterior (TA), and soleus (SOL) muscles was collected during a unilateral sudden-inversion perturbation (30°). Main Outcome Measure(s): Muscle-onset activations and magnitudes of SLRs and MLRs in the support and perturbed positions. Results: Participants with CAI showed (1) later-onset activation of the TA and SOL in the uninjured limb and bilateral decreases in the magnitude of the TA MLR in the support position, (2) increased magnitude of the PL MLR in the uninjured limb in the support and perturbed positions, and (3) increased magnitude of the PL SLR and MLR in the injured limb in the perturbed position. Conclusions: Chronic ankle instability was associated with later TA and SOL activation in the uninjured limb and bilaterally decreased magnitude of the TA MLR in the support position.Repositório Científico do Instituto Politécnico do PortoSousa, Andreia S. P.Valente, IsabelPinto, AnaSoutelo, TiagoSilva, Márcia2019-11-22T11:40:11Z20182018-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.22/14918eng10.4085/1062-6050-120-17metadata 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:RCAAP2024-01-24T01:48:51Zoai:recipp.ipp.pt:10400.22/14918Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:34:43.382664Repositório 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 |
Short and Medium Latency Responses in Participants With Chronic Ankle Instability |
title |
Short and Medium Latency Responses in Participants With Chronic Ankle Instability |
spellingShingle |
Short and Medium Latency Responses in Participants With Chronic Ankle Instability Sousa, Andreia S. P. Ankle Electromyography Joint Instability Muscle, Skeletal Postural Balance |
title_short |
Short and Medium Latency Responses in Participants With Chronic Ankle Instability |
title_full |
Short and Medium Latency Responses in Participants With Chronic Ankle Instability |
title_fullStr |
Short and Medium Latency Responses in Participants With Chronic Ankle Instability |
title_full_unstemmed |
Short and Medium Latency Responses in Participants With Chronic Ankle Instability |
title_sort |
Short and Medium Latency Responses in Participants With Chronic Ankle Instability |
author |
Sousa, Andreia S. P. |
author_facet |
Sousa, Andreia S. P. Valente, Isabel Pinto, Ana Soutelo, Tiago Silva, Márcia |
author_role |
author |
author2 |
Valente, Isabel Pinto, Ana Soutelo, Tiago Silva, Márcia |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Repositório Científico do Instituto Politécnico do Porto |
dc.contributor.author.fl_str_mv |
Sousa, Andreia S. P. Valente, Isabel Pinto, Ana Soutelo, Tiago Silva, Márcia |
dc.subject.por.fl_str_mv |
Ankle Electromyography Joint Instability Muscle, Skeletal Postural Balance |
topic |
Ankle Electromyography Joint Instability Muscle, Skeletal Postural Balance |
description |
Context: The determinant role of medium latency responses (MLRs) during compensatory postural adjustments in postural stability and the lack of clarity about the mechanisms behind chronic ankle instability (CAI) sustain the hypothesis that these postural responses are impaired in this condition. However, to the best of our knowledge, no authors have assessed MLRs in patients with CAI; most of the research regarding compensatory postural adjustments has been directed at the timing of short latency responses (SLRs). Objective: To evaluate bilateral compensatory postural responses, including SLRs and MLRs, in response to a unilateral simulated ankle-sprain mechanism in participants with CAI. Design: Case-control study. Setting: Laboratory. Patients or Other Participants: Twenty-four participants with CAI and 20 controls. Intervention(s): Bilateral electromyography of the peroneus longus (PL), peroneus brevis, tibialis anterior (TA), and soleus (SOL) muscles was collected during a unilateral sudden-inversion perturbation (30°). Main Outcome Measure(s): Muscle-onset activations and magnitudes of SLRs and MLRs in the support and perturbed positions. Results: Participants with CAI showed (1) later-onset activation of the TA and SOL in the uninjured limb and bilateral decreases in the magnitude of the TA MLR in the support position, (2) increased magnitude of the PL MLR in the uninjured limb in the support and perturbed positions, and (3) increased magnitude of the PL SLR and MLR in the injured limb in the perturbed position. Conclusions: Chronic ankle instability was associated with later TA and SOL activation in the uninjured limb and bilaterally decreased magnitude of the TA MLR in the support position. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018 2018-01-01T00:00:00Z 2019-11-22T11:40:11Z |
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/10400.22/14918 |
url |
http://hdl.handle.net/10400.22/14918 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.4085/1062-6050-120-17 |
dc.rights.driver.fl_str_mv |
metadata only access info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
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application/pdf |
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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) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799131438857060352 |