Searched for: author%3A%22van+der+Krogt%2C+Marjolein+M.%22
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Veerkamp, Kirsten (author), van der Krogt, Marjolein M. (author), Waterval, Niels F.J. (author), Geijtenbeek, T. (author), Walsh, H. P.John (author), Harlaar, J. (author), Buizer, Annemieke I. (author), Lloyd, David G. (author), Carty, Christopher P. (author)
Background: Most cases of toe walking in children are idiopathic. We used pathology-specific neuromusculoskeletal predictive simulations to identify potential underlying neural and muscular mechanisms contributing to idiopathic toe walking. Methods: A musculotendon contracture was added to the ankle plantarflexors of a generic musculoskeletal...
journal article 2024
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Hulshof, Chantal M. (author), Schallig, Wouter (author), van den Noort, Josien C. (author), Streekstra, Geert J. (author), Kleipool, Roeland P. (author), GG Dobbe, Johannes (author), Maas, Mario (author), Harlaar, J. (author), van der Krogt, Marjolein M. (author)
Segment coordinate systems (CSs) of marker-based multi-segment foot models are used to measure foot kinematics, however their relationship to the underlying bony anatomy is barely studied. The aim of this study was to compare marker-based CSs (MCSs) with bone morphology-based CSs (BCSs) for the hindfoot and forefoot. Markers were placed on...
journal article 2024
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Haberfehlner, Helga (author), van de Ven, Shankara S. (author), van der Burg, Sven A. (author), Huber, Florian (author), Georgievska, Sonja (author), Aleo, Ignazio (author), Harlaar, J. (author), Bonouvrié, Laura A. (author), van der Krogt, Marjolein M. (author), Buizer, Annemieke I. (author)
Introduction: Video-based clinical rating plays an important role in assessing dystonia and monitoring the effect of treatment in dyskinetic cerebral palsy (CP). However, evaluation by clinicians is time-consuming, and the quality of rating is dependent on experience. The aim of the current study is to provide a proof-of-concept for a machine...
journal article 2023
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van’t Veld, Ronald C. (author), Flux, Eline (author), van Oorschot, Wieneke (author), Schouten, A.C. (author), van der Krogt, Marjolein M. (author), van der Kooij, H. (author), Vos-van der Hulst, Marije (author), Keijsers, Noël L.W. (author), van Asseldonk, Edwin H.F. (author)
Background: Spasticity, i.e. stretch hyperreflexia, increases joint resistance similar to symptoms like hypertonia and contractures. Botulinum neurotoxin-A (BoNT-A) injections are a widely used intervention to reduce spasticity. BoNT-A effects on spasticity are poorly understood, because clinical measures, e.g. modified Ashworth scale (MAS),...
journal article 2023
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Veerkamp, Kirsten (author), Carty, Christopher P. (author), Waterval, Niels F.J. (author), Geijtenbeek, T. (author), Buizer, Annemieke I. (author), Lloyd, David G. (author), Harlaar, J. (author), van der Krogt, Marjolein M. (author)
Spasticity is a common impairment within pediatric neuromusculoskeletal disorders. How spasticity contributes to gait deviations is important for treatment selection. Our aim was to evaluate the pathophysiological mechanisms underlying gait deviations seen in children with spasticity, using predictive simulations. A cluster analysis was...
journal article 2023
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Flux, Eline (author), Bar-On, Lynn (author), Buizer, Annemieke I. (author), Harlaar, J. (author), van der Krogt, Marjolein M. (author)
Background: Children with cerebral palsy often show deviating calf muscle activation patterns during gait, with excess activation during early stance and insufficient activation during push-off. Research question: Can children with cerebral palsy improve their calf muscle activation patterns during gait using one session of biofeedback-driven...
journal article 2023
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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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Veerkamp, Kirsten (author), van der Krogt, Marjolein M. (author), Waterval, Niels F.J. (author), Geijtenbeek, T. (author), Walsh, Henry P.J. (author), Harlaar, J. (author), Buizer, Annemieke I. (author), Lloyd, David G. (author), Carty, Christopher P. (author)
journal article 2022
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Den Hartog, Dylan (author), van der Krogt, Marjolein M. (author), van der Burg, Sven (author), Aleo, Ignazio (author), Gijsbers, Johannes (author), Bonouvrié, Laura A. (author), Harlaar, J. (author), Buizer, Annemieke I. (author), Haberfehlner, Helga (author)
Accurate and reliable measurement of the severity of dystonia is essential for the indication, evaluation, monitoring and fine‐tuning of treatments. Assessment of dystonia in children and adolescents with dyskinetic cerebral palsy (CP) is now commonly performed by visual evaluation either directly in the doctor’s office or from video...
journal article 2022
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Schallig, Wouter (author), Streekstra, Geert J. (author), Hulshof, Chantal M. (author), Kleipool, Roeland P. (author), Dobbe, Johannes G.G. (author), Maas, Mario (author), Harlaar, J. (author), van der Krogt, Marjolein M. (author), van den Noort, Josien C. (author)
Movement of skin markers with respect to their underlying bone (i.e. soft tissue artifacts (STAs)) might corrupt the accuracy of marker-based movement analyses. This study aims to quantify STAs in 3D for foot markers and their effect on multi-segment foot kinematics as calculated by the Oxford and Rizzoli Foot Models (OFM, RFM). Fifteen...
journal article 2021
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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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Flux, Eline (author), van der Krogt, Marjolein M. (author), Harlaar, J. (author), Buizer, Annemieke I. (author), Sloot, Lizeth H. (author)
Background: As hyperactive muscle stretch reflexes hinder movement in patients with central nervous system disorders, they are a common target of treatment. To improve treatment evaluation, hyperactive reflexes should be assessed during activities as walking rather than passively. This study systematically explores the feasibility,...
journal article 2021
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Schallig, Wouter (author), van den Noort, Josien C. (author), Maas, Mario (author), Harlaar, J. (author), van der Krogt, Marjolein M. (author)
Understanding the effect of individual marker misplacements is important to improve the repeatability and aid to the interpretation of multi-segment foot models like the Oxford and Rizzoli Foot Models (OFM, RFM). Therefore, this study aimed to quantify the effect of controlled anatomical marker misplacement on multi-segment foot kinematics (i...
journal article 2021
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Sloot, Lizeth H. (author), Weide, Guido (author), van der Krogt, Marjolein M. (author), Desloovere, Kaat (author), Harlaar, J. (author), Buizer, Annemieke I. (author), Bar-On, Lynn (author)
In neurological diseases, muscles often become hyper-resistant to stretch due to hyperreflexia, an exaggerated stretch reflex response that is considered to primarily depend on the muscle's stretch velocity. However, there is still limited understanding of how different biomechanical triggers applied during clinical tests evoke these reflex...
journal article 2021
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Haberfehlner, Helga (author), Goudriaan, Marije (author), Bonouvrié, Laura A. (author), Jansma, Elise P. (author), Harlaar, J. (author), Vermeulen, R. Jeroen (author), Van Der Krogt, Marjolein M. (author), Buizer, Annemieke I. (author)
Background: In this systematic review we investigate which instrumented measurements are available to assess motor impairments, related activity limitations and participation restrictions in children and young adults with dyskinetic cerebral palsy. We aim to classify these instrumented measurements using the categories of the international...
review 2020
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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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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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Booth, Adam T.C. (author), van der Krogt, Marjolein M. (author), Harlaar, J. (author), Dominici, Nadia (author), Buizer, Annemieke I. (author)
Background: Children with cerebral palsy (CP) often show impaired selective motor control (SMC) that induces limitations in motor function. Children with CP can improve aspects of pathological gait in an immediate response to visual biofeedback. It is not known, however, how these gait adaptations are achieved at the neural level, nor do we...
journal article 2019
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Oudenhoven, Laura M. (author), van der Krogt, Marjolein M. (author), Romei, Marianna (author), van Schie, Petra E.M. (author), van de Pol, Laura A. (author), van Ouwerkerk, Willem J.R. (author), Harlaar, J. (author), Buizer, Annemieke I. (author)
Objective: To identify factors associated with long-term improvement in gait in children after selective dorsal rhizotomy (SDR). Design: Retrospective cohort study. Setting: University medical center. Participants: Children (N=36) (age 4-13y) with spastic diplegia of Gross Motor Function Classification System (GMFCS) level I (n=14), II (n=15)...
journal article 2019
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