Determinants of co-contraction during walking before and after arthroplasty for knee osteoarthritis
| Autor: | Hamid Abbasi-Bafghi, Onno G. Meijer, Maria Grazia Benedetti, Hamid R. Fallah-Yakhdani, Sjoerd M. Bruijn, Jaap H. van Dieën, Nicolette van den Dikkenberg |
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| Přispěvatelé: | Movement Behavior, Kinesiology, Research Institute MOVE, Fallah-Yakhdani HR, Abbasi-Bafghi H, Meijer OG, Bruijn SM, van den Dikkenberg N, Benedetti MG, van Dieën JH. |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Male
medicine.medical_specialty Knee Joint MALALIGNMENT medicine.medical_treatment Biophysics STRIDE KNEE ARTHROPLASTY Osteoarthritis KNEE OSTEOARTHRITIS SDG 3 - Good Health and Well-being Postural Balance Humans Medicine Orthopedics and Sports Medicine Treadmill Arthroplasty Replacement Knee Muscle Skeletal Gait Aged Aged 80 and over business.industry Middle Aged Osteoarthritis Knee medicine.disease Arthroplasty Sagittal plane medicine.anatomical_structure CO-CONTRACTION Physical therapy business WALKING Muscle Contraction |
| Zdroj: | FallahYakhdani, H R, Abbasi Bafghi, H, Meijer, O G, Bruijn, S M, van den Dikkenberg, N, Benedetti, M-G & van Dieen, J H 2012, ' Determinants of co-contraction during walking before and after arthroplasty for knee osteoarthritis ', Clinical Biomechanics, vol. 27, pp. 485-494 . https://doi.org/10.1016/j.clinbiomech.2011.11.006 Clinical Biomechanics, 27, 485-494. Elsevier Limited |
| ISSN: | 0268-0033 |
| Popis: | Background: Knee osteoarthritis patients co-contract in knee-related muscle pairs during walking. The determinants of this co-contraction remain insufficiently clear. Methods: A heterogeneous group of 14 patients was measured before and one year after knee arthroplasty, and compared to 12 healthy peers and 15 young subjects, measured once. Participants walked on a treadmill at several imposed speeds. Bilateral activity of six muscles was registered electromyographically, and co-contraction time was calculated as percentage of stride cycle time. Local dynamic stability and variability of sagittal plane knee movements were determined. The surgeon's assessment of alignment was used. Pre-operatively, multivariate regressions on co-contraction time were used to identify determinants of co-contraction. Post-operatively it was assessed if predictor variables had changed in the same direction as co-contraction time. Findings: Patients co-contracted longer than controls, but post-operatively, differences with the healthy peers were no longer significant. Varus alignment predicted co-contraction time. No patient had post-operative varus alignment. The patients' unaffected legs were more unstable, and instability predicted co-contraction time in both legs. Post-operatively, stability normalised. Longer unaffected side co-contraction time was associated with reduced affected side kinematic variability. Post-operatively, kinematic variability had further decreased. Interpretations: Varus alignment and instability are determinants of co-contraction. The benefits of co-contraction in varus alignment require further study. Co-contraction probably increases local dynamic stability, which does not necessarily decrease the risk of falling. Unaffected side co-contraction contributed to decreasing affected side variability, but other mechanisms than co-contraction may also have played a role in decreasing variability. © 2011 Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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