Searched for: contributor%3A%22Schouten%2C+Alfred+%28mentor%29%22
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Gerritsen, Kasper (author)
Muscles consists of multiple motor units (MUs) that produce the force required for our movements. Motor unitproperties are responsible for the relation between neural excitation and muscle force (excitation-force relation). Theforce of the muscle is dictated by the recruitment and the force output of the different motor units. The recruitmentis...
master thesis 2020
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Vardalakis, Nikolaos (author)
Electroencephalography (EEG) source localization has been applied in the development of braincomputer interfaces to control hand prostheses. When performing fine movements, our brain uses sensory feedback regarding position, velocity, and force to improve performance. Understanding the cortical mechanisms underlying individual finger movements...
master thesis 2020
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Heijmans, Itai (author)
The surface electromyographic (sEMG) signals that originate from skeletal muscle electrical activity, are used clinically and experimentally to determine muscular behaviour, e.g. amplitude, area under the curve and onset of activity. Surface EMG signals are inevitably contaminated by noise and artefacts from the site between the skin and...
master thesis 2019
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van der Zwaag, Peterke (author)
Falling is a problem in elderly, affecting 30% of people over 65 years old, and leading to serious injuries in 10% of the cases. Because balance is controlled in a closed loop system with a high level of redundancy, the cause of impaired balance control is often unknown. A balance control model in combination with perturbed balance experiments...
master thesis 2019
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de Graaf, Jurjan (author)
Fascicle shear is theoretically a mechanism by which skeletal muscles lengthen. Existing ultrasound based techniques allow measurement of muscle architecture parameters, but not the quantification of shear strain. In this study, an algorithm that tracks the shear strain from ultrasound images using a continuum representation of the muscle was...
master thesis 2019
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Elzinga, Maurits (author)
Neurologically impaired patients can regain motor function by engaging in rehabilita- tion. Currently there is no conclusive evidence that robotic rehabilitation has better clinical results than conventional rehabilitation but robotic rehabil- itation has the potential to increase efficiency and patient motivation, justifying improvement of reha...
master thesis 2018
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Kraaijevanger, Sven (author)
Joint impedance describes the dynamic resistance of a joint in response to position perturbations. Joint impedance is known to vary nonlinearly during movement caused by varying joint angle and muscle activation. The nonlinear behaviour can be described using linear time-varying models under certain assumption. Recently a number of time-varying...
master thesis 2018
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van der Helm, Nina (author)
Relevance: To enhance our understanding of motor impairments (e.g. post-stroke or due to Parkinson's Disease), objective measures for communication in the nervous system are required. By applying system identification techniques to oscillations in brain and muscle activity, we can objectively quantify the coupling between these areas.<br/><br/...
master thesis 2018
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Ossenkoppele, Boudewine (author)
Ultrasound gives the opportunity to look at muscles and observe their change in length. This tool has increased the knowledge about muscle-tendon dynamics and sometimes revealed surprising muscle stretch behaviour. System identification experiments use robots to disturb the ankle and measure its torque and angle. Muscle movement is derived from...
master thesis 2018
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Smid, Annemijn (author)
Migraine is associated with brain dysfunction, possibly due to disturbances in the interactions between distributed cortical regions. Detection of these disturbances in the topological organization of the brain’s functional network would contribute to further understanding of migraine pathophysiology. Altered cortical responses to external...
master thesis 2018
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Jongbloed, Barbara (author)
There is a distinction between environmental and social interactions as humans interpret the world. Environmental interactions are based on weighted sensory estimates formed on integrated redundant information. Trust is a heuristic used in social interactions. As social interactions and technology interrelate, social factors become influences on...
master thesis 2018
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Kerklaan, Martijn (author)
The dynamic relation between the displacement and reaction torque of the human joint is known as joint impedance. Properly quantifying joint impedance has medical potential in the diagnosis, understanding and modelling of movement disorders associated with neuromuscular conditions like cerebral palsy, stroke, dystonia and old age. The...
master thesis 2018
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Gonzalez Martinez, Javier Andres (author)
Humans can compensate rapidly to unforeseen errors and circumstances while performing motor tasks. These tasks are exposed to sensory and motor noise and delays originated from the biological system characteristics, as well as to varying surrounding environments while performing movements. Therefore, uncertainty of the estimate of limb position...
master thesis 2017
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de Veij Mestdagh, Jurriaan (author)
Introduction: System identification of the neuromuscular controller that regulates human balance, gives insight in the causes and effects of human balance disorders. The combination of varying perturbation properties in literature and lack of rationale behind chosen perturbation properties, reveals possible violations of assumptions made to...
master thesis 2017
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Birken, Linda (author)
Introduction: During functional electrical stimulation (FES) the onset of muscle fatigue limits the treatment and rehabilitation of patients. In previous work, variable frequency trains (VFT) have been suggested to take advantage of a tension enhancement property in muscle. The varying of other parameters in stimulation trains, such as amplitude...
master thesis 2017
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van der Jagt, Geert (author)
<i>Introduction.</i> Increased joint resistance to imposed movement (“muscle hypertonia”) is a common finding in patients with an upper motor neuron syndrome, following stroke. Contributors to muscle hypertonia are of neural (increased reflex activity) and non-neural (altered visco-elastic properties) nature. Extracorporeal shock wave therapy ...
master thesis 2017
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