Neuromuscular activation of quadriceps bellies during tasks performed in the same biomechanical condition in patients undergoing total knee arthroplasty |
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| Affiliation: | 1. Physiotherapy Unit, Humanitas Clinical and Research Center – IRCCS-, via Manzoni 56, 20089 Rozzano Milan, Italy;2. Humanitas University, Department of Biomedical Sciences, via Rita Levi Montalcini 4, 20090 Pieve Emanuele, Milan, Italy;3. Hip and Knee Orthopaedic Surgery Department, Humanitas Clinical and Research Center – IRCCS-, via Manzoni 56, 20089 Rozzano Milan, Italy;1. Institute of Movement and Neuroscience, German Sports University, Cologne, Germany;2. Faculty of Medical Engineering and Technomathematics, FH Aachen University of Applied Sciences, Aachen, Germany;1. INRIA, Montpellier University, Montpellier, France;2. Neurinnov, Montpellier, France;1. School of Electrical & Electronic Engineering, University College Dublin, Dublin, Ireland;2. School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Ireland;3. Biomedical Sciences Department, Neuromuscular Physiology Laboratory, University of Padova, Italy;1. Laboratory for Paediatric Motion Analysis and Biofeedback Rehabilitation, ALYN Paediatric and Adolescent Rehabilitation Research Centre (ALYN PARC), Jerusalem, Israel;2. Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands;3. Department of Rehabilitation Medicine, Amsterdam UMC, Amsterdam, Netherlands;4. Clinical Motion Analysis Laboratory, ALYN Paediatric and Adolescent Rehabilitation Centre, Jerusalem, Israel |
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| Abstract: | ObjectiveTo investigate neuromuscular activation of quadriceps bellies during different tasks in patients before and after total knee arthroplasty (TKA).MethodsTwenty-six patients scheduled for TKA and 16 control subjects performed three isometric tasks: knee extension (KE), hip flexion (HF), hip flexion with contralateral hip extension (HFE). Surface electromyography signals of rectus femoris, vastus medialis and vastus lateralis were collected the day before (T0), at one (T1) and three (T2) days after surgery, whereas control subjects underwent a single evaluation. The Root Mean Square peak normalized for its highest value during the three tasks (nRMS-peak) was used as index of maximum neuromuscular activation for each belly. Sixteen patients performed the postoperative assessment, due to the placement of an elastomeric pump aimed at reducing pain in 10 patients.ResultsPatients showed lower rectus femoris nRMS-peak during KE compared to HF and HFE before and after surgery (p < 0.001), as occurred in control subjects. Differently from control subjects, patients showed higher vastus medialis and vastus lateralis nRMS-peak during HF compared to KE at T1 (p = 0.008) and T2 (p = 0.039).ConclusionTKA modified quadriceps neuromuscular activation during different tasks performed the same biomechanical condition. These findings may be considered in planning physiotherapy interventions after TKA. |
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| Keywords: | Total knee arthroplasty Neuromuscular activation deficits Quadriceps femoris |
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