Responses in knee joint muscle activation patterns to different perturbations during gait in healthy subjects
Copyright © 2021 The Authors. Published by Elsevier Ltd.. All rights reserved..
PURPOSE: To compare the responses in knee joint muscle activation patterns to different perturbations during gait in healthy subjects.
SCOPE: Nine healthy participants were subjected to perturbed walking on a split-belt treadmill. Four perturbation types were applied, each at five intensities. The activations of seven muscles surrounding the knee were measured using surface EMG. The responses in muscle activation were expressed by calculating mean, peak, co-contraction (CCI) and perturbation responses (PR) values. PR captures the responses relative to unperturbed gait. Statistical parametric mapping analysis was used to compare the muscle activation patterns between conditions.
RESULTS: Perturbations evoked only small responses in muscle activation, though higher perturbation intensities yielded a higher mean activation in five muscles, as well as higher PR. Different types of perturbation led to different responses in the rectus femoris, medial gastrocnemius and lateral gastrocnemius. The participants had lower CCI just before perturbation compared to the same phase of unperturbed gait.
CONCLUSIONS: Healthy participants respond to different perturbations during gait with small adaptations in their knee joint muscle activation patterns. This study provides insights in how the muscles are activated to stabilize the knee when challenged. Furthermore it could guide future studies in determining aberrant muscle activation in patients with knee disorders.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:60 |
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| Enthalten in: |
Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology - 60(2021) vom: 01. Okt., Seite 102572 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Schrijvers, Jim C [VerfasserIn] |
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| Links: |
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| Themen: |
Gait |
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| Anmerkungen: |
Date Completed 22.09.2021 Date Revised 22.09.2021 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.jelekin.2021.102572 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM328191000 |
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| 245 | 1 | 0 | |a Responses in knee joint muscle activation patterns to different perturbations during gait in healthy subjects |
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| 500 | |a Date Completed 22.09.2021 | ||
| 500 | |a Date Revised 22.09.2021 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2021 The Authors. Published by Elsevier Ltd.. All rights reserved. | ||
| 520 | |a PURPOSE: To compare the responses in knee joint muscle activation patterns to different perturbations during gait in healthy subjects | ||
| 520 | |a SCOPE: Nine healthy participants were subjected to perturbed walking on a split-belt treadmill. Four perturbation types were applied, each at five intensities. The activations of seven muscles surrounding the knee were measured using surface EMG. The responses in muscle activation were expressed by calculating mean, peak, co-contraction (CCI) and perturbation responses (PR) values. PR captures the responses relative to unperturbed gait. Statistical parametric mapping analysis was used to compare the muscle activation patterns between conditions | ||
| 520 | |a RESULTS: Perturbations evoked only small responses in muscle activation, though higher perturbation intensities yielded a higher mean activation in five muscles, as well as higher PR. Different types of perturbation led to different responses in the rectus femoris, medial gastrocnemius and lateral gastrocnemius. The participants had lower CCI just before perturbation compared to the same phase of unperturbed gait | ||
| 520 | |a CONCLUSIONS: Healthy participants respond to different perturbations during gait with small adaptations in their knee joint muscle activation patterns. This study provides insights in how the muscles are activated to stabilize the knee when challenged. Furthermore it could guide future studies in determining aberrant muscle activation in patients with knee disorders | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Gait | |
| 650 | 4 | |a Joint stability | |
| 650 | 4 | |a Knee | |
| 650 | 4 | |a Muscle activation | |
| 650 | 4 | |a Perturbations | |
| 700 | 1 | |a van den Noort, Josien C |e verfasserin |4 aut | |
| 700 | 1 | |a van der Esch, Martin |e verfasserin |4 aut | |
| 700 | 1 | |a Harlaar, Jaap |e verfasserin |4 aut | |
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