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Title: | Lower limb inter-joint coordination of unilateral transfemoral amputees : implications for adaptation control | Authors: | Xu, Z Wong, DWC Yan, F Chen, TLW Zhang, M Jiang, WT Fan, YB |
Issue Date: | 2-Jun-2020 | Source: | Applied sciences, 2 June 2020, v. 10, no. 12, 4072, p. 1-12 | Abstract: | The gait of transfemoral amputees can be made smoother by adjusting the inter-joint coordination of both lower limbs. In this study, we compared the inter-joint coordination of the amputated and non-amputated limbs of unilateral amputees to able-bodied controls. Eight amputees and eight able-bodied control participants were recruited. Walking speed, stance-swing time ratio, joint angle, joint angular velocity, and inter-joint coordination parameters-including continuous relative phase (CRP) and decomposition index (DI)-of the lower-limb joint pairs in stance and swing phases were investigated. Similarity of the CRP between groups was evaluated using cross-correlation measures and root-mean-square, and the variability of the CRP was examined by deviation phase (DP). There were significant differences between the amputated limbs and controls in CRP of hip-knee and knee-ankle in stance and swing, DP of knee-ankle and hip-ankle in stance, and DI of hip-knee in swing. For the non-amputated limbs, there were significant differences in CRP and DP of knee-ankle, and DI of hip-knee in swing compared to controls. The amputees utilized unique inter-joint coordination patterns for both limbs-particularly the hip joint-to compensate for the support-capability impairment due to limb salvage and ensure foot placement accuracy. | Keywords: | Amputee gait Continuous relative phase Decomposition index Compensation strategy Phase portrait Inter-joint coordination |
Publisher: | Molecular Diversity Preservation International (MDPI) | Journal: | Applied sciences | ISSN: | 2076-3417 | DOI: | 10.3390/app10124072 | Rights: | © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). The following publication Xu, Z.; Wong, D. .-C.; Yan, F.; Chen, T. .-W.; Zhang, M.; Jiang, W.-T.; Fan, Y.-B. Lower Limb Inter-Joint Coordination of Unilateral Transfemoral Amputees: Implications for Adaptation Control. Appl. Sci. 2020, 10, 4072 is available at https://dx.doi.org/10.3390/app10124072 |
Appears in Collections: | Journal/Magazine Article |
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