Analysis of the Ankle Moment-Angle Curve in Different Gait Speeds and Phases for Designing Ankle-Foot Prosthesis
Objective: Aim of this study was to analysis the ankle moment-angle relation and its characteristics at different gait speeds and phases for using in prosthetic ankle-foot design. Materials & Methods: This was a cross-sectional analytic study in which 20 participants were chosen with assessable...
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| Format: | Article |
| Language: | fas |
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University of Social Welfare and Rehabilitation Sciences
2014-01-01
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| Series: | Journal of Rehabilitation |
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| Online Access: | http://rehabilitationj.uswr.ac.ir/browse.php?a_code=A-10-461-1&slc_lang=en&sid=1 |
| _version_ | 1819077054091493376 |
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| author | Zahra Safaei-Pour Ali Esteki Farhad Tabatabaei-Ghomsheh Seyyed Mohammad Ebrahim Mousavi |
| author_facet | Zahra Safaei-Pour Ali Esteki Farhad Tabatabaei-Ghomsheh Seyyed Mohammad Ebrahim Mousavi |
| author_sort | Zahra Safaei-Pour |
| collection | DOAJ |
| description | Objective: Aim of this study was to analysis the ankle moment-angle relation and its characteristics at different gait speeds and phases for using in prosthetic ankle-foot design.
Materials & Methods: This was a cross-sectional analytic study in which 20 participants were chosen with assessable sampling method. Gait analysis at different speeds was performed with two force-plates and five high speed cameras. Ankle characteristics including quasi-stiffness and work were estimated at three periods of stance phase based on moment-angle loop. Mean differences were analyzed with repeated measure ANOVA and regression analysis was performed to fit the linear model to the data.
Results: Moment-angle curve was clockwise at slower speeds and turned counter-clockwise while speed increased. The best fitted line to the work-walking speed curve had R2=0.81. There were significant differences in quasi-stiffness between fast and normal speed and slower speeds (P<0.001).
Conclusion: Moment-angle curve displayed ankle passive function in slower speeds and active function in faster speeds. Results showed ankle characteristics varied at different gait phases and speeds. Thus, at slower speeds a spring-damper model with regulable damping would simulate the ankle function. However, at higher speeds the active elements also should be considered. |
| first_indexed | 2024-12-21T18:51:06Z |
| format | Article |
| id | doaj.art-30d87bc8410647af947ef44b15c37bbc |
| institution | Directory Open Access Journal |
| issn | 1607-2960 1607-2960 |
| language | fas |
| last_indexed | 2024-12-21T18:51:06Z |
| publishDate | 2014-01-01 |
| publisher | University of Social Welfare and Rehabilitation Sciences |
| record_format | Article |
| series | Journal of Rehabilitation |
| spelling | doaj.art-30d87bc8410647af947ef44b15c37bbc2022-12-21T18:53:44ZfasUniversity of Social Welfare and Rehabilitation SciencesJournal of Rehabilitation1607-29601607-29602014-01-011449098Analysis of the Ankle Moment-Angle Curve in Different Gait Speeds and Phases for Designing Ankle-Foot ProsthesisZahra Safaei-Pour0Ali Esteki1Farhad Tabatabaei-Ghomsheh2Seyyed Mohammad Ebrahim Mousavi3 Department of Biomedical Engineering, Science & Research Branch, Islamic Azad University (IAU), Tehran, Iran. Department of Biomedical Engineering and Physics, Shahid Beheshti University of Medical Sciences, Tehran, Iran Department of Ergonomics, University of Social Welfare and Rehabilitation Science, Tehran, Iran Department of Prosthetics and Orthotics, University of Social Welfare and Rehabilitation Science, Tehran, Iran Objective: Aim of this study was to analysis the ankle moment-angle relation and its characteristics at different gait speeds and phases for using in prosthetic ankle-foot design. Materials & Methods: This was a cross-sectional analytic study in which 20 participants were chosen with assessable sampling method. Gait analysis at different speeds was performed with two force-plates and five high speed cameras. Ankle characteristics including quasi-stiffness and work were estimated at three periods of stance phase based on moment-angle loop. Mean differences were analyzed with repeated measure ANOVA and regression analysis was performed to fit the linear model to the data. Results: Moment-angle curve was clockwise at slower speeds and turned counter-clockwise while speed increased. The best fitted line to the work-walking speed curve had R2=0.81. There were significant differences in quasi-stiffness between fast and normal speed and slower speeds (P<0.001). Conclusion: Moment-angle curve displayed ankle passive function in slower speeds and active function in faster speeds. Results showed ankle characteristics varied at different gait phases and speeds. Thus, at slower speeds a spring-damper model with regulable damping would simulate the ankle function. However, at higher speeds the active elements also should be considered.http://rehabilitationj.uswr.ac.ir/browse.php?a_code=A-10-461-1&slc_lang=en&sid=1Walking Ankle moment Ankle angle Ankle-foot prosthesis Quasi-stiffness |
| spellingShingle | Zahra Safaei-Pour Ali Esteki Farhad Tabatabaei-Ghomsheh Seyyed Mohammad Ebrahim Mousavi Analysis of the Ankle Moment-Angle Curve in Different Gait Speeds and Phases for Designing Ankle-Foot Prosthesis Journal of Rehabilitation Walking Ankle moment Ankle angle Ankle-foot prosthesis Quasi-stiffness |
| title | Analysis of the Ankle Moment-Angle Curve in Different Gait Speeds and Phases for Designing Ankle-Foot Prosthesis |
| title_full | Analysis of the Ankle Moment-Angle Curve in Different Gait Speeds and Phases for Designing Ankle-Foot Prosthesis |
| title_fullStr | Analysis of the Ankle Moment-Angle Curve in Different Gait Speeds and Phases for Designing Ankle-Foot Prosthesis |
| title_full_unstemmed | Analysis of the Ankle Moment-Angle Curve in Different Gait Speeds and Phases for Designing Ankle-Foot Prosthesis |
| title_short | Analysis of the Ankle Moment-Angle Curve in Different Gait Speeds and Phases for Designing Ankle-Foot Prosthesis |
| title_sort | analysis of the ankle moment angle curve in different gait speeds and phases for designing ankle foot prosthesis |
| topic | Walking Ankle moment Ankle angle Ankle-foot prosthesis Quasi-stiffness |
| url | http://rehabilitationj.uswr.ac.ir/browse.php?a_code=A-10-461-1&slc_lang=en&sid=1 |
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