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Search: authors:"Herman van der Kooij"

17 papers found.
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Manual physical balance assistance of therapists during gait training of stroke survivors: characteristics and predicting the timing

During gait training, physical therapists continuously supervise stroke survivors and provide physical support to their pelvis when they judge that the patient is unable to keep his balance. This paper is the first in providing quantitative data about the corrective forces that therapists use during gait training. It is assumed that changes in the acceleration of a patient’s COM...

Manual physical balance assistance of therapists during gait training of stroke survivors: characteristics and predicting the timing

During gait training, physical therapists continuously supervise stroke survivors and provide physical support to their pelvis when they judge that the patient is unable to keep his balance. This paper is the first in providing quantitative data about the corrective forces that therapists use during gait training. It is assumed that changes in the acceleration of a patient’s COM...

Manual physical balance assistance of therapists during gait training of stroke survivors: characteristics and predicting the timing

During gait training, physical therapists continuously supervise stroke survivors and provide physical support to their pelvis when they judge that the patient is unable to keep his balance. This paper is the first in providing quantitative data about the corrective forces that therapists use during gait training. It is assumed that changes in the acceleration of a patient’s COM...

Manual physical balance assistance of therapists during gait training of stroke survivors: characteristics and predicting the timing

During gait training, physical therapists continuously supervise stroke survivors and provide physical support to their pelvis when they judge that the patient is unable to keep his balance. This paper is the first in providing quantitative data about the corrective forces that therapists use during gait training. It is assumed that changes in the acceleration of a patient’s COM...

Paretic versus non-paretic stepping responses following pelvis perturbations in walking chronic-stage stroke survivors

The effects of a stroke, such as hemiparesis, can severely hamper the ability to walk and to maintain balance during gait. Providing support to stroke survivors through a robotic exoskeleton, either to provide training or daily-life support, requires an understanding of the balance impairments that result from a stroke. Here, we investigate the differences between the paretic and...

Robot-aided assessment of lower extremity functions: a review

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 constraints or to inadequate validity...

Balance Asymmetry in Parkinson’s Disease and Its Contribution to Freezing of Gait

and Its Contribution to Freezing of Gait Tjitske A. Boonstra 0 Jeroen P. P. van Vugt 0 Herman van der Kooij 0 Bastiaan R. Bloem 0 Natasha M. Maurits, University Medical Center Groningen UMCG

Reliability of System Identification Techniques to Assess Standing Balance in Healthy Elderly

Objectives System identification techniques have the potential to assess the contribution of the underlying systems involved in standing balance by applying well-known disturbances. We investigated the reliability of standing balance parameters obtained with multivariate closed loop system identification techniques. Methods In twelve healthy elderly balance tests were performed...

Identification of the contribution of the ankle and hip joints to multi-segmental balance control

Herman van der Kooij 0 1 0 Laboratory for Biomechanical Engineering, MIRA institute for biomechanical technology and technical medicine, University of Twente, Faculty of Engineering Technology , PO Box 217

Selective control of gait subtasks in robotic gait training: foot clearance support in stroke survivors with a powered exoskeleton

Edwin HF van Asseldonk 0 Herman van der Kooij 0 1 0 Institute for Biomedical Technology and Technical Medicine (MIRA), Department of Biomechanical Engineering, University of Twente , Enschede , The

Non-linear stimulus-response behavior of the human stance control system is predicted by optimization of a system with sensory and motor noise

We developed a theory of human stance control that predicted (1) how subjects re-weight their utilization of proprioceptive and graviceptive orientation information in experiments where eyes closed stance was perturbed by surface-tilt stimuli with different amplitudes, (2) the experimentally observed increase in body sway variability (i.e. the “remnant” body sway that could not...

Control of thumb force using surface functional electrical stimulation and muscle load sharing

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 muscle recruitment curve and a...

Poor motor function is associated with reduced sensory processing after stroke

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 stroke survivors participated in this study...

The effect of impedance-controlled robotic gait training on walking ability and quality in individuals with chronic incomplete spinal cord injury: an explorative study

Background There is increasing interest in the use of robotic gait-training devices in walking rehabilitation of incomplete spinal cord injured (iSCI) individuals. These devices provide promising opportunities to increase the intensity of training and reduce physical demands on therapists. Despite these potential benefits, robotic gait-training devices have not yet demonstrated...

The effect of directional inertias added to pelvis and ankle on gait

Background Gait training robots should display a minimum added inertia in order to allow normal walking. The effect of inertias in specific directions is yet unknown. We set up two experiments to assess the effect of inertia in anteroposterior (AP) direction to the ankle and AP and mediolateral (ML) direction to the pelvis. Methods We developed an experimental setup to apply...

An explorative, cross-sectional study into abnormal muscular coupling during reach in chronic stroke patients

Background In many stroke patients arm function is limited, which can be related to an abnormal coupling between shoulder and elbow joints. The extent to which this can be translated to activities of daily life (ADL), in terms of muscle activation during ADL-like movements, is rather unknown. Therefore, the present study examined the occurrence of abnormal coupling on functional...