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Assessment of an Assistive Control Approach Applied in an Active Knee Orthosis Plus Walker for Post-Stroke Gait Rehabilitation

The goal of this study is the assessment of an assistive control approach applied to an active knee orthosis plus a walker for gait rehabilitation. The study evaluates post-stroke patients and healthy subjects (control group) in terms of kinematics, kinetics, and muscle activity. Muscle and gait inf...

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Autores principales: Villa-Parra, Ana Cecilia, Lima, Jessica, Delisle-Rodriguez, Denis, Vargas-Valencia, Laura, Frizera-Neto, Anselmo, Bastos, Teodiano
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7249659/
https://www.ncbi.nlm.nih.gov/pubmed/32357405
http://dx.doi.org/10.3390/s20092452
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author Villa-Parra, Ana Cecilia
Lima, Jessica
Delisle-Rodriguez, Denis
Vargas-Valencia, Laura
Frizera-Neto, Anselmo
Bastos, Teodiano
author_facet Villa-Parra, Ana Cecilia
Lima, Jessica
Delisle-Rodriguez, Denis
Vargas-Valencia, Laura
Frizera-Neto, Anselmo
Bastos, Teodiano
author_sort Villa-Parra, Ana Cecilia
collection PubMed
description The goal of this study is the assessment of an assistive control approach applied to an active knee orthosis plus a walker for gait rehabilitation. The study evaluates post-stroke patients and healthy subjects (control group) in terms of kinematics, kinetics, and muscle activity. Muscle and gait information of interest were acquired from their lower limbs and trunk, and a comparison was conducted between patients and control group. Signals from plantar pressure, gait phase, and knee angle and torque were acquired during gait, which allowed us to verify that the stance control strategy proposed here was efficient at improving the patients’ gaits (comparing their results to the control group), without the necessity of imposing a fixed knee trajectory. An innovative evaluation of trunk muscles related to the maintenance of dynamic postural equilibrium during gait assisted by our active knee orthosis plus walker was also conducted through inertial sensors. An increase in gait cycle (stance phase) was also observed when comparing the results of this study to our previous work. Regarding the kinematics, the maximum knee torque was lower for patients when compared to the control group, which implies that our orthosis did not demand from the patients a knee torque greater than that for healthy subjects. Through surface electromyography (sEMG) analysis, a significant reduction in trunk muscle activation and fatigability, before and during the use of our orthosis by patients, was also observed. This suggest that our orthosis, together with the assistive control approach proposed here, is promising and could be considered to complement post-stroke patient gait rehabilitation.
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spelling pubmed-72496592020-06-10 Assessment of an Assistive Control Approach Applied in an Active Knee Orthosis Plus Walker for Post-Stroke Gait Rehabilitation Villa-Parra, Ana Cecilia Lima, Jessica Delisle-Rodriguez, Denis Vargas-Valencia, Laura Frizera-Neto, Anselmo Bastos, Teodiano Sensors (Basel) Article The goal of this study is the assessment of an assistive control approach applied to an active knee orthosis plus a walker for gait rehabilitation. The study evaluates post-stroke patients and healthy subjects (control group) in terms of kinematics, kinetics, and muscle activity. Muscle and gait information of interest were acquired from their lower limbs and trunk, and a comparison was conducted between patients and control group. Signals from plantar pressure, gait phase, and knee angle and torque were acquired during gait, which allowed us to verify that the stance control strategy proposed here was efficient at improving the patients’ gaits (comparing their results to the control group), without the necessity of imposing a fixed knee trajectory. An innovative evaluation of trunk muscles related to the maintenance of dynamic postural equilibrium during gait assisted by our active knee orthosis plus walker was also conducted through inertial sensors. An increase in gait cycle (stance phase) was also observed when comparing the results of this study to our previous work. Regarding the kinematics, the maximum knee torque was lower for patients when compared to the control group, which implies that our orthosis did not demand from the patients a knee torque greater than that for healthy subjects. Through surface electromyography (sEMG) analysis, a significant reduction in trunk muscle activation and fatigability, before and during the use of our orthosis by patients, was also observed. This suggest that our orthosis, together with the assistive control approach proposed here, is promising and could be considered to complement post-stroke patient gait rehabilitation. MDPI 2020-04-26 /pmc/articles/PMC7249659/ /pubmed/32357405 http://dx.doi.org/10.3390/s20092452 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Villa-Parra, Ana Cecilia
Lima, Jessica
Delisle-Rodriguez, Denis
Vargas-Valencia, Laura
Frizera-Neto, Anselmo
Bastos, Teodiano
Assessment of an Assistive Control Approach Applied in an Active Knee Orthosis Plus Walker for Post-Stroke Gait Rehabilitation
title Assessment of an Assistive Control Approach Applied in an Active Knee Orthosis Plus Walker for Post-Stroke Gait Rehabilitation
title_full Assessment of an Assistive Control Approach Applied in an Active Knee Orthosis Plus Walker for Post-Stroke Gait Rehabilitation
title_fullStr Assessment of an Assistive Control Approach Applied in an Active Knee Orthosis Plus Walker for Post-Stroke Gait Rehabilitation
title_full_unstemmed Assessment of an Assistive Control Approach Applied in an Active Knee Orthosis Plus Walker for Post-Stroke Gait Rehabilitation
title_short Assessment of an Assistive Control Approach Applied in an Active Knee Orthosis Plus Walker for Post-Stroke Gait Rehabilitation
title_sort assessment of an assistive control approach applied in an active knee orthosis plus walker for post-stroke gait rehabilitation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7249659/
https://www.ncbi.nlm.nih.gov/pubmed/32357405
http://dx.doi.org/10.3390/s20092452
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