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Geelen, J.E. (author), van der Helm, F.C.T. (author), Schouten, A.C. (author), Mugge, W. (author)Human hands are complex biomechanical systems that allow for dexterous tasks with many degrees of freedom. Coordination of the fingers is essential for many activities of daily living and involves integrating sensory signals. During this sensory integration, the central nervous system deals with the uncertainty of sensory signals. When...journal article 2023
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van de Ruit, M.L. (author), Mugge, W. (author), Cavallo, Gaia (author), Lataire, John (author), Ludvig, Daniel (author), Schouten, A.C. (author)Accurate and swift tuning of joint impedance is crucial to perform movement and interaction with our environment. Time-varying system identification enables quantification of joint impedance during movement. Many methods have been developed over the years, each with their own mathematical approach and underlying assumptions. Yet, for the...journal article 2021
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Muurling, Marijn (author), Lötters, Freek J.B. (author), Geelen, J.E. (author), Schouten, A.C. (author), Mugge, W. (author)Introduction: Sensorimotor control can be disturbed because of pain and trauma. There is scarce comprehension about which component of the sensorimotor system would benefit the most from treatment in distal radius fracture (DRF). Purpose of the Study: The purpose of this study was to determine whether the sensorimotor control of subjects with...journal article 2021
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Rahmati, Zahra (author), Behzadipour, Saeed (author), Schouten, A.C. (author), Taghizadeh, Ghorban (author), Firoozbakhsh, Keikhosrow (author)BACKGROUND: Balance training improves postural control in Parkinson's disease (PD). However, a systematic approach for the development of individualized, optimal training programs is still lacking, as the learning dynamics of the postural control in PD, over a training program, are poorly understood. OBJECTIVES: We investigated the learning...journal article 2020
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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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Rahmati, Zahra (author), Schouten, A.C. (author), Behzadipour, Saeed (author), Taghizadeh, Ghorban (author), Firoozbakhsh, Keikhosrow (author)Background: Impaired postural control in Parkinson's disease (PD) seriously compromises life quality. Although balance training improves mobility and postural stability, lack of quantitative studies on the neurophysiological mechanisms of balance training in PD impedes the development of patient-specific therapies. We evaluated the effects of...journal article 2019
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Pasma, J.H. (author), Assländer, Lorenz (author), van Kordelaar, J. (author), de Kam, Digna (author), Mergner, Thomas (author), Schouten, A.C. (author)The Independent Channel (IC) model is a commonly used linear balance control model in the frequency domain to analyze human balance control using system identification and parameter estimation. The IC model is a rudimentary and noise-free description of balance behavior in the frequency domain, where a stable model representation is not...journal article 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 de Ruit, M.L. (author), Cavallo, Gaia (author), Lataire, John (author), van der Helm, F.C.T. (author), Mugge, W. (author), van Wingerden, J.W. (author), Schouten, A.C. (author)During movements, humans continuously regulate their joint impedance to minimize control effort and optimize performance. Joint impedance describes the relationship between a joint's position and torque acting around the joint. Joint impedance varies with joint angle and muscle activation and differs from trial-to-trial due to inherent...journal article 2018
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Pasma, J.H. (author), Boonstra, T.A. (author), van Kordelaar, J. (author), Spyropoulou, V. (author), Schouten, A.C. (author)Balance control models are used to describe balance behavior in health and disease. We identified the unique contribution and relative importance of each parameter of a commonly used balance control model, the Independent Channel (IC) model, to identify which parameters are crucial to describe balance behavior. The balance behavior was expressed...journal article 2017
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Vlaar, M.P. (author), Solis Escalante, T. (author), Vardy, A.N. (author), van der Helm, F.C.T. (author), Schouten, A.C. (author)Cortical responses to continuous stimuli as recorded using either magneto- or electroencephalography (EEG) have shown power at harmonics of the stimulated<br/>frequency, indicating nonlinear behavior. Even though the selection of analysis techniques depends on the linearity of the system under study, the importance of nonlinear contributions to...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), Siegmund, G.P. (author), Schouten, A.C. (author), Blouin, J.S. (author)The vestibular system is crucial for postural control; however there are considerable differences in the task dependence and frequency response of vestibular reflexes in appendicular and axial muscles. For example, vestibular reflexes are only evoked in appendicular muscles when vestibular information is relevant to postural control, while in...journal article 2015
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Lobo-Prat, J. (author), Keemink, A.Q.L. (author), Stienen, A.H.A. (author), Schouten, A.C. (author), Veltink, P.H. (author), Koopman, B.F.J.M. (author)Background: The performance capabilities and limitations of control interfaces for the operation of active movement-assistive devices remain unclear. Selecting an optimal interface for an application requires a thorough understanding of the performance of multiple control interfaces. Methods: In this study the performance of EMG-, force- and...journal article 2014
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Westerveld, A.J. (author), Schouten, A.C. (author), Veltink, P.H. (author), Van der Kooij, H. (author)Background Stroke survivors often have difficulties in manipulating objects with their affected hand. Thumb control plays an important role in object manipulation. Surface functional electrical stimulation (FES) can assist movement. We aim to control the 2D thumb force by predicting the sum of individual muscle forces, described by a sigmoidal...journal article 2013
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Boonstra, T.A. (author), Schouten, A.C. (author), Van der Kooij, H. (author)Background Human stance involves multiple segments, including the legs and trunk, and requires coordinated actions of both. A novel method was developed that reliably estimates the contribution of the left and right leg (i.e., the ankle and hip joints) to the balance control of individual subjects. Methods The method was evaluated using...journal article 2013
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Forbes, P.A. (author), Happee, R. (author), Van der Helm, F.C.T. (author), Schouten, A.C. (author)Force and position perturbations are widely applied to identify muscular and reflexive contributions to posture maintenance of the arm. Both task instruction (force vs. position) and the inherently linked perturbation type (i.e., force perturbations-position task and position perturbations-force tasks) affect these contributions and their mutual...journal article 2011
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Mugge, W. (author), Abbink, D.A. (author), Schouten, A.C. (author), Dewald, J.P.A. (author), Van der Helm, F.C.T. (author)This study aims to quantify the separate contributions of muscle force feedback, muscle spindle activity and co-contraction to the performance of voluntary tasks (‘‘reduce the influence of perturbations on maintained force or position’’). Most human motion control studies either isolate only one contributor, or assume that relevant reflexive...journal article 2009
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- Stienen, A.H.A. (author), Schouten, A.C. (author), Schuurmans, J. (author), Van Der Helm, Frans C.T. (author) journal article 2007
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Campfens, S.F. (author), Zandvliet, S.B. (author), Meskers, C.G.M. (author), Schouten, A.C. (author), Van Putten, M.J.A.M. (author), Van der Kooij, H. (author)Abstract The possibility to regain motor function after stroke depends on the intactness of motor and sensory pathways. In this study, we evaluated afferent sensory pathway information transfer and processing after stroke with the coherence between cortical activity and a position perturbation (position-cortical coherence, PCC). Eleven subacute...journal article