Schumacher, Christian ; Berry, Andrew ; Lemus, Daniel ; Rode, Christian ; Seyfarth, André ; Vallery, Heike (2019)
Biarticular muscles are most responsive to upper-body pitch perturbations in human standing.
In: Scientific Reports, 2019, 9
doi: 10.1038/s41598-019-50995-3
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
Balancing the upper body is pivotal for upright and efficient gait. While models have identified potentially useful characteristics of biarticular thigh muscles for postural control of the upper body, experimental evidence for their specific role is lacking. Based on theoretical findings, we hypothesised that biarticular muscle activity would increase strongly in response to upper-body perturbations. To test this hypothesis, we used a novel Angular Momentum Perturbator (AMP) that, in contrast to existing methods, perturbs the upper-body posture with only minimal effect on Centre of Mass (CoM) excursions. The impulse-like AMP torques applied to the trunk of subjects resulted in upper-body pitch deflections of up to 17° with only small CoM excursions below 2 cm. Biarticular thigh muscles (biceps femoris long head and rectus femoris) showed the strongest increase in muscular activity (mid- and long-latency reflexes, starting 100 ms after perturbation onset) of all eight measured leg muscles which highlights the importance of biarticular muscles for restoring upper-body balance. These insights could be used for improving technological aids like rehabilitation or assistive devices, and the effectiveness of physical training for fall prevention e.g. for elderly people.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Schumacher, Christian ; Berry, Andrew ; Lemus, Daniel ; Rode, Christian ; Seyfarth, André ; Vallery, Heike |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Biarticular muscles are most responsive to upper-body pitch perturbations in human standing |
| Sprache: | Deutsch |
| Publikationsjahr: | 2019 |
| Publikationsdatum der Erstveröffentlichung: | 2019 |
| Verlag: | Springer Nature |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Scientific Reports |
| Jahrgang/Volume einer Zeitschrift: | 9 |
| DOI: | 10.1038/s41598-019-50995-3 |
| URL / URN: | https://doi.org/10.1038/s41598-019-50995-3 |
| Herkunft: | Zweitveröffentlichung aus gefördertem Golden Open Access |
| Kurzbeschreibung (Abstract): | Balancing the upper body is pivotal for upright and efficient gait. While models have identified potentially useful characteristics of biarticular thigh muscles for postural control of the upper body, experimental evidence for their specific role is lacking. Based on theoretical findings, we hypothesised that biarticular muscle activity would increase strongly in response to upper-body perturbations. To test this hypothesis, we used a novel Angular Momentum Perturbator (AMP) that, in contrast to existing methods, perturbs the upper-body posture with only minimal effect on Centre of Mass (CoM) excursions. The impulse-like AMP torques applied to the trunk of subjects resulted in upper-body pitch deflections of up to 17° with only small CoM excursions below 2 cm. Biarticular thigh muscles (biceps femoris long head and rectus femoris) showed the strongest increase in muscular activity (mid- and long-latency reflexes, starting 100 ms after perturbation onset) of all eight measured leg muscles which highlights the importance of biarticular muscles for restoring upper-body balance. These insights could be used for improving technological aids like rehabilitation or assistive devices, and the effectiveness of physical training for fall prevention e.g. for elderly people. |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-92292 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 700 Künste und Unterhaltung > 796 Sport |
| Fachbereich(e)/-gebiet(e): | 03 Fachbereich Humanwissenschaften 03 Fachbereich Humanwissenschaften > Institut für Sportwissenschaft |
| Hinterlegungsdatum: | 03 Nov 2019 20:57 |
| Letzte Änderung: | 03 Nov 2019 20:57 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Biarticular muscles are most responsive to upper-body pitch perturbations in human standing. (deposited 03 Nov 2019 20:57) [Gegenwärtig angezeigt]
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