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4 résultat(s) recherche sur le mot-clé 'exoskeleton'
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Adjustments after an ankle dorsiflexion perturbation during human running / Mikael Scohier in Gait & posture, Vol. 35, n°1 (Janvier 2012)
[article]
Titre : Adjustments after an ankle dorsiflexion perturbation during human running Type de document : document électronique Auteurs : Mikael Scohier ; D. De Jaeger ; B. Schepens Année de publication : 2012 Langues : Anglais (eng) Mots-clés : Human running Perturbation Exoskeleton Ground reaction forces Résumé : In this study we investigated the effect of a mechanical perturbation of unexpected timing during human
running. With the use of a powered exoskeleton, we evoked a dorsiflexion of the right ankle during its
swing phase while subjects ran on a treadmill. The perturbation resulted in an increase of the right ankle
dorsiflexion of at least 58. The first two as well as the next five steps after the perturbation were analyzed
to observe the possible immediate and late biomechanical adjustments. In all cases subjects continued to
run after the perturbation. The immediate adjustments were the greatest and the most frequent when
the delay between the right ankle perturbation and the subsequent right foot touch-down was the
shortest. For example, the vertical impact peak force was strongly modified on the first step after the
perturbations and this adjustment was correlated to a right ankle angle still clearly modified at touchdown.
Some late adjustments were observed in the subsequent steps predominantly occurring during
left steps. Subjects maintained the step length and the step period as constant as possible by adjusting
other step parameters in order to avoid stumbling and continue running at the speed imposed by the
treadmill. To our knowledge, our experiments are the first to investigate perturbations of unexpected
timing during human running. The results show that humans have a time-dependent, adapted strategy
to maintain their running pattern.En ligne : https://www.researchgate.net/publication/51600521_Adjustments_after_an_ankle_dor [...] Permalink : ./index.php?lvl=notice_display&id=84532
in Gait & posture > Vol. 35, n°1 (Janvier 2012)[article] Adjustments after an ankle dorsiflexion perturbation during human running [document électronique] / Mikael Scohier ; D. De Jaeger ; B. Schepens . - 2012.
Langues : Anglais (eng)
in Gait & posture > Vol. 35, n°1 (Janvier 2012)
Mots-clés : Human running Perturbation Exoskeleton Ground reaction forces Résumé : In this study we investigated the effect of a mechanical perturbation of unexpected timing during human
running. With the use of a powered exoskeleton, we evoked a dorsiflexion of the right ankle during its
swing phase while subjects ran on a treadmill. The perturbation resulted in an increase of the right ankle
dorsiflexion of at least 58. The first two as well as the next five steps after the perturbation were analyzed
to observe the possible immediate and late biomechanical adjustments. In all cases subjects continued to
run after the perturbation. The immediate adjustments were the greatest and the most frequent when
the delay between the right ankle perturbation and the subsequent right foot touch-down was the
shortest. For example, the vertical impact peak force was strongly modified on the first step after the
perturbations and this adjustment was correlated to a right ankle angle still clearly modified at touchdown.
Some late adjustments were observed in the subsequent steps predominantly occurring during
left steps. Subjects maintained the step length and the step period as constant as possible by adjusting
other step parameters in order to avoid stumbling and continue running at the speed imposed by the
treadmill. To our knowledge, our experiments are the first to investigate perturbations of unexpected
timing during human running. The results show that humans have a time-dependent, adapted strategy
to maintain their running pattern.En ligne : https://www.researchgate.net/publication/51600521_Adjustments_after_an_ankle_dor [...] Permalink : ./index.php?lvl=notice_display&id=84532 Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Triceps Surae Stretch Reflex Modulation After a Mechanically Evoked Ankle Dorsiflexion During the Swing Phase of Human Running / Mikael Scohier in Motor control [périodique éléctronique], Vol.18, n°4 (2014)
[article]
Titre : Triceps Surae Stretch Reflex Modulation After a Mechanically Evoked Ankle Dorsiflexion During the Swing Phase of Human Running Type de document : document électronique Auteurs : Mikael Scohier ; D. De Jaeger ; B. Schepens Année de publication : 2014 Article en page(s) : p. 383-394 Langues : Français (fre) Mots-clés : locomotion perturbation exoskeleton Résumé : The purpose of this study was to mechanically evoke a triceps surae stretch reflex during the swing phase of running, to study its within-the-step phase dependency. Seven participants ran on a treadmill at 2.8 m·s–1 wearing an exoskeleton capable of evoking a sudden ankle dorsiflexion. We measured the electromyographic activity of the soleus, medial and lateral gastrocnemii just after the perturbation to evaluate the triceps surae stretch reflex. Similar perturbations were also delivered at rest. Our results showed that the stretch reflex was suppressed during the swing phase of running, except in late swing where a late reflex response was observed. At rest, all triceps surae muscles showed an early reflex response to stretch. Our findings suggest that the triceps surae short/medium-latency stretch reflex cannot be evoked during swing phase and thus cannot contribute to the control of the locomotor pattern after aperturbation during this phase En ligne : https://www.researchgate.net/profile/Benedicte_Schepens/publication/261520793_Tr [...] Permalink : ./index.php?lvl=notice_display&id=84534
in Motor control [périodique éléctronique] > Vol.18, n°4 (2014) . - p. 383-394[article] Triceps Surae Stretch Reflex Modulation After a Mechanically Evoked Ankle Dorsiflexion During the Swing Phase of Human Running [document électronique] / Mikael Scohier ; D. De Jaeger ; B. Schepens . - 2014 . - p. 383-394.
Langues : Français (fre)
in Motor control [périodique éléctronique] > Vol.18, n°4 (2014) . - p. 383-394
Mots-clés : locomotion perturbation exoskeleton Résumé : The purpose of this study was to mechanically evoke a triceps surae stretch reflex during the swing phase of running, to study its within-the-step phase dependency. Seven participants ran on a treadmill at 2.8 m·s–1 wearing an exoskeleton capable of evoking a sudden ankle dorsiflexion. We measured the electromyographic activity of the soleus, medial and lateral gastrocnemii just after the perturbation to evaluate the triceps surae stretch reflex. Similar perturbations were also delivered at rest. Our results showed that the stretch reflex was suppressed during the swing phase of running, except in late swing where a late reflex response was observed. At rest, all triceps surae muscles showed an early reflex response to stretch. Our findings suggest that the triceps surae short/medium-latency stretch reflex cannot be evoked during swing phase and thus cannot contribute to the control of the locomotor pattern after aperturbation during this phase En ligne : https://www.researchgate.net/profile/Benedicte_Schepens/publication/261520793_Tr [...] Permalink : ./index.php?lvl=notice_display&id=84534 Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Effects of robotic gait training after stroke : A meta-analysis / Geoffroy Moucheboeuf in Annals of physical and rehabilitation medicine, Vol. 63, n°6 (November 20)
[article]
Titre : Effects of robotic gait training after stroke : A meta-analysis Type de document : texte imprimé Auteurs : Geoffroy Moucheboeuf ; Romain Griffier ; David Gasq ; Bertrand Glize ; Laurent Bouyer ; Patrick Dehail ; Hélène Cassoudesalle Année de publication : 2020 Article en page(s) : p. 518-534 Note générale : doi.org/10.1016/j.rehab.2020.02.008 Langues : Anglais (eng) Mots-clés : Stroke Robot-assisted gait training Exoskeleton End-effector Gait Walking Rehabilitation Résumé : Background
Robotic devices are often used in rehabilitation and might be efficient to improve walking capacity after stroke.
Objective
First to investigate the effects of robot-assisted gait training after stroke and second to explain the observed heterogeneity of results in previous meta-analyses.
Methods
All randomized controlled trials investigating exoskeletons or end-effector devices in adult patients with stroke were searched in databases (MEDLINE, EMBASE, CENTRAL, CINAHL, OPENGREY, OPENSIGLE, PEDRO, WEB OF SCIENCE, CLINICAL TRIALS, conference proceedings) from inception to November 2019, as were bibliographies of previous meta-analyses, independently by 2 reviewers. The following variables collected before and after the rehabilitation program were gait speed, gait endurance, Berg Balance Scale (BBS), Functional Ambulation Classification (FAC) and Timed Up and Go scores. We also extracted data on randomization method, blinding of outcome assessors, drop-outs, intention (or not) to treat, country, number of participants, disease duration, mean age, features of interventions, and date of outcomes assessment.
Results
We included 33 studies involving 1466 participants. On analysis by subgroups of intervention, as compared with physiotherapy alone, physiotherapy combined with body-weight support training and robot-assisted gait training conferred greater improvement in gait speed (+0.09 m/s, 95% confidence interval [CI] 0.03 to 0.15; p = 0.002), FAC scores (+0.51, 95% CI 0.07 to 0.95; p = 0.022) and BBS scores (+4.16, 95% CI 2.60 to 5.71; p = 0.000). A meta-regression analysis suggested that these results were underestimated by the attrition bias of studies.
Conclusions
Robot-assisted gait training combined with physiotherapy and body-weight support training seems an efficient intervention for gait recovery after stroke.Permalink : ./index.php?lvl=notice_display&id=91465
in Annals of physical and rehabilitation medicine > Vol. 63, n°6 (November 20) . - p. 518-534[article] Effects of robotic gait training after stroke : A meta-analysis [texte imprimé] / Geoffroy Moucheboeuf ; Romain Griffier ; David Gasq ; Bertrand Glize ; Laurent Bouyer ; Patrick Dehail ; Hélène Cassoudesalle . - 2020 . - p. 518-534.
doi.org/10.1016/j.rehab.2020.02.008
Langues : Anglais (eng)
in Annals of physical and rehabilitation medicine > Vol. 63, n°6 (November 20) . - p. 518-534
Mots-clés : Stroke Robot-assisted gait training Exoskeleton End-effector Gait Walking Rehabilitation Résumé : Background
Robotic devices are often used in rehabilitation and might be efficient to improve walking capacity after stroke.
Objective
First to investigate the effects of robot-assisted gait training after stroke and second to explain the observed heterogeneity of results in previous meta-analyses.
Methods
All randomized controlled trials investigating exoskeletons or end-effector devices in adult patients with stroke were searched in databases (MEDLINE, EMBASE, CENTRAL, CINAHL, OPENGREY, OPENSIGLE, PEDRO, WEB OF SCIENCE, CLINICAL TRIALS, conference proceedings) from inception to November 2019, as were bibliographies of previous meta-analyses, independently by 2 reviewers. The following variables collected before and after the rehabilitation program were gait speed, gait endurance, Berg Balance Scale (BBS), Functional Ambulation Classification (FAC) and Timed Up and Go scores. We also extracted data on randomization method, blinding of outcome assessors, drop-outs, intention (or not) to treat, country, number of participants, disease duration, mean age, features of interventions, and date of outcomes assessment.
Results
We included 33 studies involving 1466 participants. On analysis by subgroups of intervention, as compared with physiotherapy alone, physiotherapy combined with body-weight support training and robot-assisted gait training conferred greater improvement in gait speed (+0.09 m/s, 95% confidence interval [CI] 0.03 to 0.15; p = 0.002), FAC scores (+0.51, 95% CI 0.07 to 0.95; p = 0.022) and BBS scores (+4.16, 95% CI 2.60 to 5.71; p = 0.000). A meta-regression analysis suggested that these results were underestimated by the attrition bias of studies.
Conclusions
Robot-assisted gait training combined with physiotherapy and body-weight support training seems an efficient intervention for gait recovery after stroke.Permalink : ./index.php?lvl=notice_display&id=91465 Exemplaires (1)
Cote Support Localisation Section Disponibilité Revue Revue Centre de Documentation HELHa Campus Montignies Armoires à volets Document exclu du prêt - à consulter sur place
Exclu du prêtThe use of exoskeletons to help with prone positioning in the intensive care unit during COVID-19 / Nicla Settembre in Annals of physical and rehabilitation medicine, Vol. 63, n°4 (Juillet 2020)
[article]
Titre : The use of exoskeletons to help with prone positioning in the intensive care unit during COVID-19 Type de document : texte imprimé Auteurs : Nicla Settembre ; Pauline Maurice ; Jean Paysant ; Jean Theurel ; Laurent Claudon ; Antoine Kimmoun ; Bruno Levy ; Hind Hani ; Bruno Chenuel ; Serena Ivaldi Année de publication : 2020 Article en page(s) : p. 379-382 Note générale : doi.org/10.1016/j.rehab.2020.05.004 Langues : Anglais (eng) Mots-clés : COVID-19 Exoskeleton Prone position Ergonomy Simulation Intensive care unit Permalink : ./index.php?lvl=notice_display&id=90888
in Annals of physical and rehabilitation medicine > Vol. 63, n°4 (Juillet 2020) . - p. 379-382[article] The use of exoskeletons to help with prone positioning in the intensive care unit during COVID-19 [texte imprimé] / Nicla Settembre ; Pauline Maurice ; Jean Paysant ; Jean Theurel ; Laurent Claudon ; Antoine Kimmoun ; Bruno Levy ; Hind Hani ; Bruno Chenuel ; Serena Ivaldi . - 2020 . - p. 379-382.
doi.org/10.1016/j.rehab.2020.05.004
Langues : Anglais (eng)
in Annals of physical and rehabilitation medicine > Vol. 63, n°4 (Juillet 2020) . - p. 379-382
Mots-clés : COVID-19 Exoskeleton Prone position Ergonomy Simulation Intensive care unit Permalink : ./index.php?lvl=notice_display&id=90888 Exemplaires (1)
Cote Support Localisation Section Disponibilité Revue Revue Centre de Documentation HELHa Campus Montignies Armoires à volets Document exclu du prêt - à consulter sur place
Exclu du prêt