Neuromotor Dynamics of Human Locomotion in Challenging Settings.
Behavioral Neuroscience
Biological Sciences
Neuroscience
Journal
iScience
ISSN: 2589-0042
Titre abrégé: iScience
Pays: United States
ID NLM: 101724038
Informations de publication
Date de publication:
24 Jan 2020
24 Jan 2020
Historique:
received:
02
06
2019
revised:
15
09
2019
accepted:
19
12
2019
pubmed:
22
1
2020
medline:
22
1
2020
entrez:
22
1
2020
Statut:
ppublish
Résumé
Is the control of movement less stable when we walk or run in challenging settings? Intuitively, one might answer that it is, given that challenging locomotion externally (e.g., rough terrain) or internally (e.g., age-related impairments) makes our movements more unstable. Here, we investigated how young and old humans synergistically activate muscles during locomotion when different perturbation levels are introduced. Of these control signals, called muscle synergies, we analyzed the local stability and the complexity (or irregularity) over time. Surprisingly, we found that perturbations force the central nervous system to produce muscle activation patterns that are less unstable and less complex. These outcomes show that robust locomotion control in challenging settings is achieved by producing less complex control signals that are more stable over time, whereas easier tasks allow for more unstable and irregular control.
Identifiants
pubmed: 31962235
pii: S2589-0042(19)30542-5
doi: 10.1016/j.isci.2019.100796
pmc: PMC6971393
pii:
doi:
Types de publication
Journal Article
Langues
eng
Pagination
100796Informations de copyright
Copyright © 2019 The Author(s). Published by Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of Interests The authors declare no competing interests.
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