Searched for: department:"Biomechanical%5C%2BEngineering"
(1 - 19 of 19)
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Meskers, C.G.M. (author), De Groot, J. (author), De Vlugt, E. (author), Schouten, A.C. (author)
Progress in diagnosis and treatment of movement disorders after neurological diseases like stroke, cerebral palsy (CP), dystonia and at old age requires understanding of the altered capacity to adequately respond to physical obstacles in the environment. With posture and movement disorders, the control of muscles is hampered, resulting in...
journal article 2015
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Van der Krogt, H. (author), Klomp, A. (author), De Groot, J.H. (author), De Vlugt, E. (author), Van der Helm, F.C.T. (author), Meskers, C.G.M. (author), Arendzen, J.H. (author)
Background: Understanding movement disorder after stroke and providing targeted treatment for post stroke patients requires valid and reliable identification of biomechanical (passive) and neural (active and reflexive) contributors. Aim of this study was to assess test-retest reliability of passive, active and reflexive parameters and to...
journal article 2015
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Vegter, R.J.K. (author), Hartog, J. (author), De Groot, S. (author), Lamoth, C.J. (author), Bekker, M.J. (author), Van der Scheer, J.W. (author), Van der Woude, L.H.V. (author), Veeger, H.E.J. (author)
Background To propel in an energy-efficient manner, handrim wheelchair users must learn to control the bimanually applied forces onto the rims, preserving both speed and direction of locomotion. Previous studies have found an increase in mechanical efficiency due to motor learning associated with changes in propulsion technique, but it is...
journal article 2015
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Van der Scheer, J.W. (author), De Groot, S. (author), Tepper, M. (author), Gobets, D. (author), Veeger, H.E.J. (author), Van der Woude, L.H.V. (author), Woldring, F. (author), Valent, L. (author), Slootman, H. (author), Faber, W. (author)
Objectives: To describe wheelchair-specific anaerobic work capacity, isometric strength and peak aerobic work capacity of physically inactive people with long-term spinal cord injury using outcomes of tests that are feasible for use in rehabilitation centres, and to determine associations among these fitness components. Design: Cross-sectional...
journal article 2015
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De Groot, S. (author)
Training in a simulator offers potential advantages compared to training in a non-simulated environment. Generally it is cheaper, safer, there is more control over the environment, and data collection is less complicated. These potential advantages give simulators the possibility to offer effective training. This thesis is divided into three...
doctoral thesis 2013
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De Gooijer-van de Groep, K.L. (author), De Vlugt, E. (author), De Groot, J.H. (author), Van der Heijden-Maessen, H.C.M. (author), Wielheesen, D.H.M. (author), Van Wijlen-Hempel, R.M.S. (author), Arendzen, J.H. (author), Meskers, C.G.M. (author)
Background Spastic paresis in cerebral palsy (CP) is characterized by increased joint stiffness that may be of neural origin, i.e. improper muscle activation caused by e.g. hyperreflexia or non-neural origin, i.e. altered tissue viscoelastic properties (clinically: “spasticity” vs. “contracture”). Differentiation between these components is hard...
journal article 2013
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Vegter, R.J.K. (author), Lamoth, C.J. (author), De Groot, S. (author), Veeger, H.E.J. (author), Van der Woude, L.H.V. (author)
Background Handrim wheelchair propulsion is a complex bimanual motor task. The bimanually applied forces on the rims determine the speed and direction of locomotion. Measurements of forces and torques on the handrim are important to study status and change of propulsion technique (and consequently mechanical strain) due to processes of learning,...
journal article 2013
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Van der Krogt, H.J.M. (author), Meskers, C.G.M. (author), De Groot, J.H. (author), Klomp, A. (author), Arendzen, J.H. (author)
Background: Movement disorders after stroke are still captured by clinical gaze and translated to ordinal scores of low resolution. There is a clear need for objective quantification, with outcome measures related to pathophysiological background. Neural and non-neural contributors to joint behavior should be separated using different...
journal article 2012
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Vegter, R.J.K. (author), Lamoth, C.J. (author), Veeger, H.E.J. (author), De Groot, S. (author), Van der Woude, L.H.V. (author)
Changes in propulsion technique due to motor learning might account for a higher mechanical efficiency (ME, the ratio of internal power over external power). The changes in ME and propulsion technique were studied in a learning experiment, three times a week for eight minutes, with nine able-bodied subjects, simulating early rehabilitation....
conference paper 2011
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Bregman, D.J.J. (author), Van der Krogt, M.M. (author), De Groot, V. (author), Harlaar, J. (author), Wisse, M. (author), Collins, S.H. (author)
Background In stroke and multiple sclerosis patients, gait is frequently hampered by a reduced ability to push-off with the ankle caused by weakness of the plantar-flexor muscles. To enhance ankle push-off and to decrease the high energy cost of walking, spring-like carbon-composite Ankle Foot Orthoses are frequently prescribed. However, it is...
journal article 2011
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De Groot, S. (author), De Winter, J.C.F. (author)
Racecar drivers could benefit from new training methods for learning to drive fast lap times. Inspired by the learning-from-errors principle, this simulator-based study investigated the effect of the tire-road friction coefficient on the training effectiveness of a car racing task. Three groups of 15 inexperienced racecar drivers (low grip (LG),...
conference paper 2011
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De Vlugt, E. (author), Van Eesbeek, S. (author), Baines, P. (author), Hilte, J. (author), Meskers, C.G.M. (author), De Groot, J.H. (author)
Muscles behave as elastic springs during the initial strain phase, indicated as short range stiffness (SRS). Beyond a certain amount of strain the muscle demonstrates a more viscous behavior. The strain at which the muscle transits from elastic- to viscous-like behavior is called the elastic limit and is believed to be the result of breakage of...
journal article 2011
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De Vlugt, E. (author), De Groot, J.H. (author), Schenkeveld, K.E. (author), Arendzen, J.H. (author), Van der Helm, F.C.T. (author), Meskers, C.G.M. (author)
Quantifying increased joint resistance into its contributing factors i.e. stiffness and viscosity ("hypertonia") and stretch reflexes ("hyperreflexia") is important in stroke rehabilitation. Existing clinical tests, such as the Ashworth Score, do not permit discrimination between underlying tissue and reflexive (neural) properties. We propose an...
journal article 2010
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De Groot, S. (author), De Winter, J.C.F. (author), Wieringa, P.A. (author), Mulder, M. (author)
Braking to a full stop at a prescribed target position is a driving manoeuvre regularly used in experiments to investigate driving behaviour or to test vehicle acceleration feedback systems in simulators. Many different performance measures have been reported in the literature for analysing braking. These may or may not be useful to analyse the...
conference paper 2010
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De Winter, J.C.F. (author), Dodou, D. (author), De Groot, S. (author), Abbink, D.A. (author), Wieringa, P.A. (author)
This paper presents the results of integrating hands-on experience in an engineering MSc course on human-machine systems. Students could voluntarily complete a homework assignment in which they performed manual control tasks using dedicated software. The tasks were accompanied by questions that students had to answer using the theory taught in...
conference paper 2010
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De Winter, J.C.F. (author), Spek, A.C.E. (author), De Groot, S. (author), Wieringa, P.A. (author)
This paper describes two driving simulator experiments on left turn gap acceptance at intersections. In the first experiment, participants (N = 24) had to turn left at 25 intersections and cross an approaching traffic stream of 25 equally-spaced vehicles, with a different combination of intervehicle gap time and approach speed at each...
conference paper 2010
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Meskers, C.G.M. (author), Schouten, A.C. (author), Rich, M.M.L. (author), De Groot, J.H. (author), Schuurmans, J. (author), Arendzen, J.H. (author)
The long latency M2 electromyographic response of a suddenly stretched active muscle is stretch duration dependent of which the nature is unclear. We investigated the inXuence of the group II aVerent blocker tizanidine on M2 response characteristics of the m. Xexor carpi radialis (FCR). M2 response magnitude and eliciting probability in a group...
journal article 2009
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Meskers, C.G.M. (author), Schouten, A.C. (author), De Groot, J.H. (author), De Vlugt, E. (author), Van Hilten, B.J.J. (author), Van der Helm, F.C.T. (author), Arendzen, H.J.H. (author)
Background Instead of hyper-reflexia as sole paradigm, post-stroke movement disorders are currently considered the result of a complex interplay between neuronal and muscular properties, modified by level of activity. We used a closed loop system identification technique to quantify individual contributors to wrist joint stiffness during an...
journal article 2009
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Schuurmans, J. (author), De Vlugt, E. (author), Schouten, A.C. (author), Meskers, C.G. (author), De Groot, J.H. (author), Van der Helm, F.C.T. (author)
Sudden stretch of active muscle typically results in two characteristic electromyographic responses: the short latency M1 and the long latency M2. The M1 response originates from the monosynaptic Ia afferent reflex pathway. The M2 response is less well understood and is likely a compound response to different afferent inputs mediated by spinal...
journal article 2009
Searched for: department:"Biomechanical%5C%2BEngineering"
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