dc.contributor.author
Alves, Sónia A.
dc.contributor.author
Ehrig, Rainald M.
dc.contributor.author
Raffalt, Peter C.
dc.contributor.author
Bender, Alwina
dc.contributor.author
Duda, Georg N.
dc.contributor.author
Agres, Alison N.
dc.date.accessioned
2021-01-27T14:32:35Z
dc.date.available
2021-01-27T14:32:35Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/29369
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-29115
dc.description.abstract
Though gait asymmetry is used as a metric of functional recovery in clinical rehabilitation, there is no consensus on an ideal method for its evaluation. Various methods have been proposed to analyze single bilateral signals but are limited in scope, as they can often use only positive signals or discrete values extracted from time-scale data as input. By defining five symmetry axioms, a framework for benchmarking existing methods was established and a new method was described here for the first time: the weighted universal symmetry index (wUSI), which overcomes limitations of other methods. Both existing methods and the wUSI were mathematically compared to each other and in respect to their ability to fulfill the proposed symmetry axioms. Eligible methods that fulfilled these axioms were then applied using both discrete and continuous approaches to ground reaction force (GRF) data collected from healthy gait, both with and without artificially induced asymmetry using a single instrumented elbow crutch. The wUSI with a continuous approach was the only symmetry method capable of identifying GRF asymmetry differences in different walking conditions in all three planes of motion. When used with a continuous approach, the wUSI method was able to detect asymmetries while avoiding artificial inflation, a common problem reported in other methods. In conclusion, the wUSI is proposed as a universal method to quantify three-dimensional GRF asymmetries, which may also be expanded to other biomechanical signals.
en
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
gait asymmetry
en
dc.subject
ground reaction forces
en
dc.subject
bilateral signals
en
dc.subject.ddc
600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit
dc.title
Quantifying Asymmetry in Gait: The Weighted Universal Symmetry Index to Evaluate 3D Ground Reaction Forces
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
579511
dcterms.bibliographicCitation.doi
10.3389/fbioe.2020.579511
dcterms.bibliographicCitation.journaltitle
Frontiers in Bioengineering and Biotechnology
dcterms.bibliographicCitation.originalpublishername
Frontiers Media SA
dcterms.bibliographicCitation.volume
8
refubium.affiliation
Charité - Universitätsmedizin Berlin
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.bibliographicCitation.pmid
33195140
dcterms.isPartOf.eissn
2296-4185