Harmonic ratios: A quantification of step to step symmetry.
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| Title: | Harmonic ratios: A quantification of step to step symmetry. |
|---|---|
| Authors: | Bellanca, J. L.1, Lowry, K. A.2 kal121@pitt.edu, VanSwearingen, J. M.3, Brach, J. S.3, Redfern, M. S.1 |
| Source: | Journal of Biomechanics. 2013, Vol. 46 Issue 4, p828-831. 4p. |
| Subjects: | Fourier analysis, Dynamic stability, Gait in humans, Mathematical analysis, Locomotion |
| Abstract: | The harmonic ratio (HR), derived from the Fourier analysis of trunk accelerations, has been described in various ways as a measure of walking smoothness, walking rhythmicity, or dynamic stability. There is an increasing interest in applying the HR technique to investigate the impact of various pathologies on locomotion; however, explanation of the method has been limited. The aim here is to present a clear description of the mathematical basis of HRs and an understanding of their interpretation. We present harmonic theory, the interpretation of the HR using sinusoidal signals, and an example using actual trunk accelerations and harmonic analyses during limb-loading conditions. We suggest that the HR method may be better defined, not as a measure of rhythmicity or stability, but as a measure of step-to-step symmetry within a stride. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Biomechanics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 86459358 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.jbiomech.2012.12.008 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 4 StartPage: 828 Subjects: – SubjectFull: Fourier analysis Type: general – SubjectFull: Dynamic stability Type: general – SubjectFull: Gait in humans Type: general – SubjectFull: Mathematical analysis Type: general – SubjectFull: Locomotion Type: general Titles: – TitleFull: Harmonic ratios: A quantification of step to step symmetry. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Bellanca, J. L. – PersonEntity: Name: NameFull: Lowry, K. A. – PersonEntity: Name: NameFull: VanSwearingen, J. M. – PersonEntity: Name: NameFull: Brach, J. S. – PersonEntity: Name: NameFull: Redfern, M. S. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 02 Text: 2013 Type: published Y: 2013 Identifiers: – Type: issn-print Value: 00219290 Numbering: – Type: volume Value: 46 – Type: issue Value: 4 Titles: – TitleFull: Journal of Biomechanics Type: main |
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