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Dielissen, Tim (author)Introduction: During the sit-to-stand (STS) motion, thigh push-of (TP) is frequently used, yet the biomechanical advantage for the upper extremity, is relatively unknown. In this thesis, the STS motion is analyzed for three different techniques; TP, armrest push-off (AP), and no arm aid (NA). The aim of this study is to determine the...master thesis 2023
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van den Heuvel, Gaia (author)Children with cerebral palsy (CP) commonly have bony deformities of the foot, which lead to pain and gait problems. One of the causes of such a deformity is an imbalance in muscle forces around the foot. In turn, the bony deformity can also alter muscle function, due to, for example, altered muscle moment arm lengths. In this study, the altered...master thesis 2023
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Heijerman, Scott (author)The ability of musculoskeletal models to acquire metrics and simulate human motion enables researchers to perform biomechanical analysis of daily activities. The improved analysis of human motion could for instance help recognize physical decline early. The sit-to-stand movement, which is performed 60 times daily on average, is one greatly...master thesis 2023
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Greveling, Stan (author)The Delft Hand and Wrist model is a recently created musculoskeletal model in the OpenSim environment. The current model lacks a validation of the thumb muscles. Therefore, the main goal of this work is to perform a quantitative trend validation by analyzing the correlation between experimentally measured muscle activity data and muscle forces...master thesis 2022
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Smit, Nerissa (author)There is an increasing need for transfemoral prostheses that provide gait support, stability, safety and comfort. Although there are many prostheses available in different levels of complexity and price, there is still room for improvement. It has been proved that the cost of transport (CoT) for walking is significantly increased for...master thesis 2022
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Bittner, M. (author), Yang, W. (author), Zhang, X. (author), Seth, A. (author), van Gemert, J.C. (author), van der Helm, F.C.T. (author)Markerless estimation of 3D Kinematics has the great potential to clinically diagnose and monitor movement disorders without referrals to expensive motion capture labs; however, current approaches are limited by performing multiple de-coupled steps to estimate the kinematics of a person from videos. Most current techniques work in a multi-step...journal article 2022
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Moya-Esteban, A. (author), van der Kooij, H. (author), Sartori, M. (author)Low back joint compression forces have been linked to the development of chronic back pain. Back-support exoskeletons controllers based on low back compression force estimates could potentially reduce the incidence of chronic pain. However, progress has been hampered by the lack of robust and accurate methods for compression force estimation....journal article 2022
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Noteboom, L. (author), Hoozemans, Marco J.M. (author), Veeger, H.E.J. (author), van der Helm, F.C.T. (author)Muscle force analysis can be essential for injury risk estimation and performance enhancement in sports like strength training. However, current methods to record muscle forces including electromyography or marker-based measurements combined with a musculoskeletal model are time-consuming and restrict the athlete's natural movement due to...journal article 2022
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Cop, Christopher P. (author), Schouten, A.C. (author), Koopman, Bart (author), Sartori, Massimo (author)The simultaneous modulation of joint torque and stiffness enables humans to perform large repertoires of movements, while versatilely adapting to external mechanical demands. Multi-muscle force control is key for joint torque and stiffness modulation. However, the inability to directly measure muscle force in the intact moving human prevents...journal article 2022
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Yang, Wei-Tse (author)We present the first deep learning approach to estimate the human skeletal system of the musculoskeletal model from monocular video. The current practice of musculoskeletal modeling relies on a motion capture system and OpenSim. The data is recorded in a restricted environment, and OpenSim workflow for musculoskeletal modeling is costly. Our...master thesis 2021
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Hendriksen, Maud (author)Introduction: A thigh push-off is often used as a compensation strategy for standing up by elderly people. However, the biomechanics of this movement are not known. In this thesis the standing-up movement with the use of the thigh push-off strategy (TP), the armrest push-off strategy (AR) and the no arm aid strategy (NA) was analysed. The aim...master thesis 2021
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de Vet, Joran (author)Muscle-driven simulations performed with a musculoskeletal model of the human upper-extremity need to include closed-loop kinematics to capture the limb's full mobility and model the actions of thoracoscapular muscles. On the OpenSim platform, a single upper-extremity model with closed-loop kinematics is available: the thoracoscapular shoulder...master thesis 2021
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Mackenbach, Caroline (author)Background: In children with cerebral palsy(CP), muscle-tendon structures are altered. While interventions exist to treataltered structures, the selection of the most suitable treatment is verycomplex with highly variable outcomes. Musculoskeletal models have thepotential to support clinical decision making. However, a known...master thesis 2021
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Cop, Christopher P. (author), Cavallo, Gaia (author), van'T Veld, Ronald C. (author), Koopman, Bart F.J.M. (author), Lataire, John (author), Schouten, A.C. (author), Sartori, Massimo (author)In vivo joint stiffness estimation during time-varying conditions remains an open challenge. Multiple communities, e.g. system identification and biomechanics, have tackled the problem from different perspectives and using different methods, each of which entailing advantages and limitations, often complementary. System identification...review 2021
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van Trigt, B. (author), Vliegen, Liset (author), Leenen, Ton (author), Veeger, H.E.J. (author)Ulnar collateral ligament (UCL) weakening or tears occur in 16% of professional baseball pitchers. To prevent players from sustaining a UCL injury, it is important to understand the relationship between the UCL properties and elbow stabilizers with the load on the UCL during pitching. In-vitro studies showed that the ultimate external valgus...review 2021
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Prendergast, J.M. (author), Balvert, Stephan (author), Driessen, Tom (author), Seth, A. (author), Peternel, L. (author)In this work, we explore using computational musculoskeletal modeling to equip an industrial collaborative robot with awareness of the internal state of a patient to safely deliver physical therapy. A major concern of robot-mediated physical therapy is that robots may unwittingly injure patients. For patients with shoulder injuries this...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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Schenk, Lydia (author)Haptic feedback from the steering wheel is one of the most important cues for driver to vehicle interaction. The right feedback is provided by ensuring that the haptic controller provides the required steering feel. Steering feel assessment and design is divided into a subjective and objective approach. The subjective approach entails...master thesis 2020
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Cueto Fernandez, Judith (author)Advanced anatomical knowledge and understanding of the muscles involved in various movements are crucial for medical practitioners to reach the correct diagnostic and successfully predict surgery outcomes. To acquire this knowledge, 3D graphical anatomical models which are displayed stereoscopically can effectively supplement cadaveric...master thesis 2020
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Peñas de Santos, Pablo (author)Generic musculoskeletal models are not reliable predicting inter-individual variations in muscle forces. Scaling the model parameters is necessary to represent the muscle characteristics of the subjects and thus to pinpoint the differences in force capacity. Optimal Fiber (OFL) and Tendon Slack Length (TSL) have been identified as the two most...master thesis 2019
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