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Fricke, Simone S. (author), Smits, Hilde J.G. (author), Bayón, Cristina (author), Buurke, Jaap H. (author), van der Kooij, H. (author), van Asseldonk, Edwin H.F. (author)Background: Recently developed controllers for robot-assisted gait training allow for the adjustment of assistance for specific subtasks (i.e. specific joints and intervals of the gait cycle that are related to common impairments after stroke). However, not much is known about possible interactions between subtasks and a better understanding...journal article 2020
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Schut, I.M. (author), Pasma, J.H. (author), Roelofs, J. M.B. (author), Weerdesteyn, V. (author), van der Kooij, H. (author), Schouten, A.C. (author)Changes in human balance control can objectively be assessed using system identification techniques in combination with support surface translations. However, large, expensive and complex motion platforms are required, which are not suitable for the clinic. A treadmill could be a simple alternative to apply support surface translations. In...journal article 2020
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Beckers, N.W.M. (author), van Asseldonk, Edwin H.F. (author), van der Kooij, H. (author)Haptic interaction between two humans, for example, a physiotherapist assisting a patient regaining the ability to grasp a cup, likely facilitates motor skill acquisition. Haptic human–human interaction has been shown to enhance individual performance improvement in a tracking task with a visuomotor rotation perturbation. These results are...journal article 2020
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Automatic versus manual tuning of robot-assisted gait training in people with neurological disordersFricke, Simone S. (author), Bayón, Cristina (author), van der Kooij, H. (author), Edwin, Edwin H. (author)Background: In clinical practice, therapists choose the amount of assistance for robot-assisted training. This can result in outcomes that are influenced by subjective decisions and tuning of training parameters can be time-consuming. Therefore, various algorithms to automatically tune the assistance have been developed. However, the...journal article 2020
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Yang, Han Ping (author), Jang, Chau Shin (author), van der Kooij, H. (author)An electromagnetic spring-based variable stiffness actuator is a new concept with the potential to change stiffness faster than mechanical springs can; however, its nonlinear elastic property is a challenge in actuator design. In this paper, the torque response of a custom-made electromagnetic spring was studied using a ramping force test and...conference paper 2019
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Schut, I.M. (author), Pasma, J.H. (author), De Veij Mestdagh, J.C. (author), van der Kooij, H. (author), Schouten, A.C. (author)To unravel the underlying mechanisms of human balance control, system identification techniques are applied in combination with dedicated perturbations, like support surface translations. However, it remains unclear what the optimal amplitude and number of repetitions of the perturbation signal are. In this study we investigated the effect of...journal article 2019
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Wu, Amy R. (author), Simpson, Cole S. (author), van Asseldonk, Edwin H.F. (author), van der Kooij, H. (author), Ijspeert, Auke J. (author)Human walking speeds can be influenced by multiple factors, from energetic considerations to the time to reach a destination. Neurological deficits or lower-limb injuries can lead to slower walking speeds, and the recovery of able-bodied gait speed and behavior from impaired gait is considered an important rehabilitation goal. Because gait...journal article 2019
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- van 't Veld, R.C. (author), Schouten, A.C. (author), van der Kooij, H. (author), Van Asseldonk, Edwin H.F. (author) poster 2018
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van Kordelaar, J. (author), Pasma, J.H. (author), Cenciarini, Massimo (author), Schouten, A.C. (author), van der Kooij, H. (author), Maurer, Christoph (author)The vestibular system is involved in gaze stabilization and standing balance control. However, it is unclear whether vestibular dysfunction affects both processes to a similar extent. Therefore, the objective of this study was to determine how the reliance on vestibular information during standing balance control is related to gaze...journal article 2018
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Van'T Veld, Ronald C. (author), Schouten, A.C. (author), van der Kooij, H. (author), Van Asseldonk, Edwin H.F. (author)Biofeedback of online system identification estimates of intrinsic and reflexive joint impedance can be used by able-bodied subjects to voluntarily modulate their reflexive impedance independent of the intrinsic contribution. Similar to EMG-based paradigms, this could potentially be used to reduce muscle hyperreflexia in people with...conference paper 2018
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Kuck, Alexander (author), Stegeman, Dick F. (author), van der Kooij, H. (author), Van Asseldonk, Edwin H.F. (author)Trans-spinal direct current stimulation (tsDCS) is an electro-modulatory tool with possible application in the rehabilitation of spinal cord injury. TsDCS generates a small electric field, aiming to induce lasting, functional neuromodulation in the targeted neuronal networks. Earlier studies have shown significant modulatory effects after...journal article 2018
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van der Kooij, B.J.G. (author)The concept of the General Purpose Technology (GPT) of the late 1990s is a culmination of many evolutionairy views in innovation-thinking. By definition the GPT considers the technical, social, and economic effects of meta-technologies like steam-technology and electric technology. This paper uses Schumpeter’s concept of ’cluster on innovations’...working paper 2017
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van der Kooij, B.J.G. (author)The unintended economic effect on society as result of individual behaviour —Adam Smith’s ‘Invisible Hand’ of economic progress in the eighteenth century — had its equivalent in technological progress. In the nineteenth century, again individual behaviour with its Acts of Innovation and Acts of Business had an unintended effect. It changed not...working paper 2017
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van der Kooij, B.J.G. (author)Wireless technology, taken for granted today, was once an innovative wonder that would forever change how the world communicates. Developed by Guglielmo Marconi in the latter half of the nineteenth century, wireless telegraphy combined advancements made by Samuel Morse, William Cooke, Charles Wheatstone, Alexander Graham Bell, and countless...book 2017
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van der Kooij, B.J.G. (author)Defining Innovation is essential for Innovation Research. However, the available definitions of the notion of innovation found in the increasing scholarly publications, show a large heterogeneity creating confusion and incompatibility. In this paper we analyze the innovation-definitions that emerged after WW-II according their different thinking...working paper 2017
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van der Kooij, B.J.G. (author)The General Purpose Technology of Electricity (GPT-E) as a meta-technology has been a driving force of economic growth in the Second Industrial Revolution. Fuelled by inventions (eg the electric motor/dynamo, electric light, telegraph, and telephone), its micro-foundations were the General Purpose Engines (GPE). These GPEs were the basic...working paper 2017
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Wu, Amy R. (author), Dzeladini, Florin (author), Brug, Tycho J.H. (author), Tamburella, Federica (author), Tagliamonte, Nevio L. (author), Van Asseldonk, Edwin H.F. (author), van der Kooij, H. (author), Ijspeert, Auke J. (author)Versatility is important for a wearable exoskeleton controller to be responsive to both the user and the environment. These characteristics are especially important for subjects with spinal cord injury (SCI), where active recruitment of their own neuromuscular system could promote motor recovery. Here we demonstrate the capability of a novel,...journal article 2017
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Pasma, J.H. (author), van Kordelaar, J. (author), de Kam, D. (author), Weerdesteyn, V. (author), Schouten, A.C. (author), van der Kooij, H. (author)Background: Closed loop system identification (CLSIT) is a method to disentangle the contribution of underlying systems in standing balance. We investigated whether taking into account lower leg muscle activation in CLSIT could improve the reliability and accuracy of estimated parameters identifying the underlying systems. Methods: Standing...journal article 2017
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Forbes, P.A. (author), Vlutters, M (author), Dakin, CJ (author), van der Kooij, H. (author), Blouin, JS (author), Schouten, A.C. (author)During walking, the vestibular influence on locomotor activity is phase-dependent and modulated in both limbs with changes in velocity. It is unclear, however, whether this bilateral modulation is due to a coordinated mechanism between both limbs or instead through limb-specific processes that remain masked by the symmetric nature of locomotion....journal article 2017
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Maggioni, S. (author), Melendez-Calderon, A. (author), van Asseldonk, E. (author), Klamroth-Marganska, V (author), Lünenburger, L. (author), Riener, R (author), van der Kooij, H. (author)The assessment of sensorimotor functions is extremely important to understand the health status of a patient and its change over time. Assessments are necessary to plan and adjust the therapy in order to maximize the chances of individual recovery. Nowadays, however, assessments are seldom used in clinical practice due to administrative...review 2016