Searched for: subject%3A%22Biomechanics%22
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van der Burgh, B.J. (author), Filius, S.J. (author), Radaelli, G. (author), Harlaar, J. (author)
Orthotic wrist supports will be beneficial for people with muscular weakness to keep their hand in a neutral rest position and prevent potential wrist contractures. Compensating the weight of the hands is complex since the level of support depends on both wrist and forearm orientations. To explore simplified approaches, two different weight...
journal article 2024
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Waterval, N. F.J. (author), Brehm, M. A. (author), Veerkamp, K. (author), Geijtenbeek, T. (author), Harlaar, J. (author), Nollet, F. (author), van der Krogt, M. M. (author)
To maximize effects of dorsal leaf ankle foot orthoses (AFOs) on gait in people with bilateral plantarflexor weakness, the AFO properties should be matched to the individual. However, how AFO properties interact regarding their effect on gait function is unknown. We studied the interaction of AFO bending stiffness with neutral angle and...
journal article 2023
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Harlaar, J. (author), Macri, E.M. (author), Wesseling, M.G.H. (author)
Osteoarthritis (OA) has a complex, heterogeneous and only partly understood etiology. There is a definite role of joint cartilage pathomechanics in originating and progressing of the disease. Although it is still not identified precisely enough to design or select targeted treatments, the progress of this year's research demonstrates that...
review 2022
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Schallig, Wouter (author), van den Noort, Josien C. (author), Piening, Marjolein (author), Streekstra, Geert J. (author), Maas, Mario (author), van der Krogt, Marjolein M. (author), Harlaar, J. (author)
Background: Foot and ankle joint kinematics are measured during clinical gait analyses with marker-based multi-segment foot models. To improve on existing models, measurement errors due to soft tissue artifacts (STAs) and marker misplacements should be reduced. Therefore, the aim of this study is to define a clinically informed, universally...
journal article 2022
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Veerkamp, Kirsten (author), van der Krogt, Marjolein M. (author), Harlaar, J. (author), O’Brien, Thomas D. (author), Kalkman, Barbara (author), Seth, A. (author), Bar-On, Lynn (author)
Neuromusculoskeletal models can be used to evaluate aberrant muscle function in cerebral palsy (CP), for example by estimating muscle and joint contact forces during gait. However, to be accurate, models should include representative musculotendon parameters. We aimed to estimate personalised parameters that capture the mechanical behaviour...
journal article 2022
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Bakker, Nienke F. (author), Schrijvers, Jim C. (author), van den Noort, Josien C. (author), Hall, Michelle (author), van der Krogt, Marjolein M. (author), Harlaar, J. (author), van der Esch, Martin (author)
Background: Patients with knee osteoarthritis can adapt their gait to unload the most painful knee joint in order to try to reduce pain and improve physical function. However, these gait adaptations can cause higher loads on the contralateral joints. The aim of the study was to investigate the interlimb differences in knee and hip frontal...
journal article 2021
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Schrijvers, Jim C. (author), van den Noort, Josien C. (author), van der Esch, Martin (author), Harlaar, J. (author)
Knee joint instability is frequently reported by patients with knee osteoarthritis (KOA). Objective metrics to assess knee joint instability are lacking, making it difficult to target therapies aiming to improve stability. Therefore, the aim of this study was to compare responses in neuromechanics to perturbations during gait in patients with...
journal article 2021
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Booij, M. J. (author), Harlaar, J. (author), Royen, B. J.van (author), Nolte, P. A. (author), Haverkamp, D. (author), van den Noort, Josien C. (author)
Background: After total knee replacement (TKR) some patients report low self-perceived function, which is clinically measured using patient reported outcome measures (PROMs). However, PROMs, e.g. the Oxford Knee Score (OKS), inherently lack objective parameters of knee function. Biomechanical gait analysis is an objective and reliable...
journal article 2021
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Veerkamp, K. (author), Waterval, N. F.J. (author), Geijtenbeek, T. (author), Carty, C. P. (author), Lloyd, D. G. (author), Harlaar, J. (author), van der Krogt, M. M. (author)
Accurate predictive simulations of human gait rely on optimisation criteria to solve the system's redundancy. Defining such criteria is challenging, as the objectives driving the optimization of human gait are unclear. This study evaluated how minimising various physiologically-based criteria (i.e., cost of transport, muscle activity, head...
journal article 2021
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Schrijvers, J. C. (author), Rutherford, D. (author), Richards, R. (author), van den Noort, J. C. (author), van der Esch, M. (author), Harlaar, J. (author)
Background: Gait analysis has been used for decades to quantify knee function in patients with knee osteoarthritis; however, it is unknown whether and to what extent inter-laboratory differences affect the comparison of gait data between studies. Therefore, the aim of this study was to perform an inter-laboratory comparison of knee...
journal article 2021
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Booij, M. J. (author), Meinders, E. (author), Sierevelt, I. N. (author), Nolte, P. A. (author), Harlaar, J. (author), van den Noort, J. C. (author)
Background: The assessment of functional recovery of patients after a total knee replacement includes the quantification of gait deviations. Comparisons to comfortable gait of healthy controls may incorrectly suggest biomechanical gait deviations, since the usually lower walking speed of patients already causes biomechanical differences....
journal article 2021
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Zandbergen, Marit A. (author), Schallig, Wouter (author), Stebbins, Julie A. (author), Harlaar, J. (author), van der Krogt, Marjolein M. (author)
Background: Estimating muscle-tendon complex (MTC) lengths is important for planning of soft tissue surgery and evaluating outcomes, e.g. in children with cerebral palsy (CP). Conventional musculoskeletal models often represent the foot as one rigid segment, called a mono-segment foot model (mono-SFM). However, a multi-segment foot model ...
journal article 2020
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Flux, E. (author), van der Krogt, M. M. (author), Cappa, P. (author), Petrarca, M. (author), Desloovere, K. (author), Harlaar, J. (author)
With the rise of biofeedback in gait training in cerebral palsy there is a need for real-time measurements of gait kinematics. The Human Body Model (HBM) is a recently developed model, optimized for the real-time computing of kinematics. This study evaluated differences between HBM and two commonly used models for clinical gait analysis: the...
journal article 2020
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Meyns, P. (author), Kerkum, Y. L. (author), Brehm, M. A. (author), Becher, J. G. (author), Buizer, A. I. (author), Harlaar, J. (author)
In children with cerebral palsy (CP), rigid ventral shell ankle-foot orthoses (vAFOs) are often prescribed to reduce excessive knee flexion in stance and lower the energy cost of walking (ECW). However, how vAFOs affect ECW is a complex issue, as vAFOs may have an impact on lower limb biomechanics, upper body movements, and balance. Besides,...
journal article 2020
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Schallig, Wouter (author), van den Noort, Josien C. (author), McCahill, Jennifer (author), Stebbins, Julie (author), Leardini, Alberto (author), Maas, Mario (author), Harlaar, J. (author), van der Krogt, Marjolein M. (author)
Background: The Oxford Foot Model (OFM) and Rizzoli Foot Model (RFM) are the two most frequently used multi-segment models to measure foot kinematics. However, a comprehensive comparison of the kinematic output of these models is lacking. Research question: What are the differences in kinematic output between OFM and RFM during normal gait...
journal article 2020
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Waterval, Niels F.J. (author), Brehm, Merel Anne (author), Altmann, Viola C. (author), Koopman, Fieke S. (author), Den Boer, Jasper J. (author), Harlaar, J. (author), Nollet, Frans (author)
In persons with calf muscle weakness, walking energy cost is commonly increased due to persistent knee flexion and a diminished push-off. Provided ankle-foot orthoses (AFOs) usually lower walking energy cost. To maximize the reduction in energy cost, AFO bending stiffness should be individually optimized, but this is not common practice....
journal article 2020
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Schallig, W. (author), van den Noort, J. C. (author), Kleipool, R. P. (author), Dobbe, J. G.G. (author), van der Krogt, M. M. (author), Harlaar, J. (author), Maas, M. (author), Streekstra, G. J. (author)
Computed tomography (CT) imaging can be used to determine bone pose, sometimes combined with skin-mounted markers. For this specific application, a lower radiation dose than the conventional clinical dose might suffice. This study aims to determine how lowering the radiation dose of a CT-scan of the ankle and foot affects the precision of...
journal article 2019
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Oudenhoven, Laura Maria (author), Booth, Adam Thomas Crawford (author), Buizer, Annemieke Irene (author), Harlaar, J. (author), van der Krogt, Marjolein Margaretha (author)
journal article 2019
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Schrijvers, Jim (author), van den Noort, Josien C. (author), van der Esch, Martin (author), Dekker, Joost (author), Harlaar, J. (author)
Background: Instability of the knee joint during gait is frequently reported by patients with knee osteoarthritis or an anterior cruciate ligament rupture. The assessment of instability in clinical practice and clinical research studies mainly relies on self-reporting. Alternatively, parameters measured with gait analysis have been explored...
review 2019
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Veerkamp, Kirsten (author), Schallig, Wouter (author), Harlaar, J. (author), Pizzolato, Claudio (author), Carty, Christopher P. (author), Lloyd, David G. (author), van der Krogt, Marjolein M. (author)
Neuro-musculoskeletal modelling can provide insight into the aberrant muscle function during walking in those suffering cerebral palsy (CP). However, such modelling employs optimization to estimate muscle activation that may not account for disturbed motor control and muscle weakness in CP. This study evaluated different forms of neuro...
journal article 2019
Searched for: subject%3A%22Biomechanics%22
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