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2020-10-23Zeitschriftenartikel DOI: 10.18452/22321
Muscle Activation Patterns Are More Constrained and Regular in Treadmill Than in Overground Human Locomotion
dc.contributor.authorMileti, Ilaria
dc.contributor.authorSerra, Aurora
dc.contributor.authorWolf, Nerses
dc.contributor.authorMunoz-Martel, Victor
dc.contributor.authorEkizos, Antonis
dc.contributor.authorPalermo, Eduardo
dc.contributor.authorArampatzis, Adamantios
dc.contributor.authorSantuz, Alessandro
dc.date.accessioned2021-01-08T10:31:20Z
dc.date.available2021-01-08T10:31:20Z
dc.date.issued2020-10-23none
dc.identifier.other10.3389/fbioe.2020.581619
dc.identifier.urihttp://edoc.hu-berlin.de/18452/22952
dc.description.abstractThe use of motorized treadmills as convenient tools for the study of locomotion has been in vogue for many decades. However, despite the widespread presence of these devices in many scientific and clinical environments, a full consensus on their validity to faithfully substitute free overground locomotion is still missing. Specifically, little information is available on whether and how the neural control of movement is affected when humans walk and run on a treadmill as compared to overground. Here, we made use of linear and non-linear analysis tools to extract information from electromyographic recordings during walking and running overground, and on an instrumented treadmill. We extracted synergistic activation patterns from the muscles of the lower limb via non-negative matrix factorization. We then investigated how the motor modules (or time-invariant muscle weightings) were used in the two locomotion environments. Subsequently, we examined the timing of motor primitives (or time-dependent coefficients of muscle synergies) by calculating their duration, the time of main activation, and their Hurst exponent, a non-linear metric derived from fractal analysis. We found that motor modules were not influenced by the locomotion environment, while motor primitives were overall more regular in treadmill than in overground locomotion, with the main activity of the primitive for propulsion shifted earlier in time. Our results suggest that the spatial and sensory constraints imposed by the treadmill environment might have forced the central nervous system to adopt a different neural control strategy than that used for free overground locomotion, a data-driven indication that treadmills could induce perturbations to the neural control of locomotion.eng
dc.language.isoengnone
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY 4.0) Attribution 4.0 Internationalger
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectlocomotioneng
dc.subjectmuscle synergieseng
dc.subjectmotor controleng
dc.subjecttreadmill locomotioneng
dc.subjectoverground locomotioneng
dc.subjectfractal analysiseng
dc.subject.ddc570 Biowissenschaften; Biologienone
dc.titleMuscle Activation Patterns Are More Constrained and Regular in Treadmill Than in Overground Human Locomotionnone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/22952-6
dc.identifier.doihttp://dx.doi.org/10.18452/22321
dc.type.versionpublishedVersionnone
local.edoc.container-titleFrontiers in Bioengineering and Biotechnologynone
local.edoc.pages16none
local.edoc.anmerkungThis article was supported by the German Research Foundation (DFG) and the Open Access Publication Fund of Humboldt-Universität zu Berlin.none
local.edoc.type-nameZeitschriftenartikel
local.edoc.institutionKultur-, Sozial- und Bildungswissenschaftliche Fakultätnone
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
local.edoc.container-publisher-nameFrontiers Medianone
local.edoc.container-publisher-placeLausannenone
local.edoc.container-volume8none
dc.description.versionPeer Reviewednone
local.edoc.container-articlenumber581619none
dc.identifier.eissn2296-4185

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