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17 papers found.
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Quantification of Hand Motor Symptoms in Parkinson’s Disease: A Proof-of-Principle Study Using Inertial and Force Sensors

This proof-of-principle study describes the methodology and explores and demonstrates the applicability of a system, existing of miniature inertial sensors on the hand and a separate force sensor, to objectively quantify hand motor symptoms in patients with Parkinson’s disease (PD) in a clinical setting (off- and on-medication condition). Four PD patients were measured in off...

Analysis of Balance during Functional Walking in Stroke Survivors

Background An important objective of rehabilitation care is to regain adequate balance function to safely ambulate in community. However, in rehabilitation practice, it remains unclear if a stroke survivor functionally recovers by restitution or by learning to compensate for the lack of restoration of body function. Aim of this study is to propose and evaluate methods for the...

Measuring 3D Hand and Finger Kinematics—A Comparison between Inertial Sensing and an Opto-Electronic Marker System

Objective analysis of hand and finger kinematics is important to increase understanding of hand function and to quantify motor symptoms for clinical diagnosis. The aim of this paper is to compare a new 3D measurement system containing multiple miniature inertial sensors (PowerGlove) with an opto-electronic marker system during specific finger tasks in three healthy subjects...

Variable and Asymmetric Range of Enslaving: Fingers Can Act Independently over Small Range of Flexion

The variability in the numerous tasks in which we use our hands is very large. However, independent movement control of individual fingers is limited. To assess the extent of finger independency during full-range finger flexion including all finger joints, we studied enslaving (movement in non-instructed fingers) and range of independent finger movement through the whole finger...

Responsiveness of electrical nociceptive detection thresholds to capsaicin (8 %)-induced changes in nociceptive processing

Pain disorders can be initiated and maintained by malfunctioning of one or several mechanisms underlying the nociceptive function. Psychophysical procedures allow the estimation of nociceptive detection thresholds using intra-epidermal electrical stimuli. By varying the temporal properties of electrical stimuli, various contributions of nociceptive processes to stimulus...

Observation of time-dependent psychophysical functions and accounting for threshold drifts

Methods to obtain estimates of psychophysical functions are used in numerous fields, such as audiology, vision, and pain. Neurophysiological and psychological processes underlying this function are assumed to remain stationary throughout a psychophysical experiment. However, violation of this assumption (e.g., due to habituation or changing decisional factors) likely affects the...

Effect of temporal stimulus properties on the nociceptive detection probability using intra-epidermal electrical stimulation

. Veltink 0 Jan R. Buitenweg 0 0 Biomedical Signals and Systems, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente , Zuidhorst, ZH-222, Drienerlolaan 5, PO BOX 217

Non-invasive control interfaces for intention detection in active movement-assistive devices

L Herder 4 5 Bart FJM Koopman 0 Peter H Veltink 3 0 Department of Biomechanical Engineering, University of Twente , Drienerlolaan 5, 7522, NB, Enschede , The Netherlands 1 Department of Physical

Assessment of hand kinematics using inertial and magnetic sensors

*, Victor I Sluiter, Daniel Roetenberg and Peter H Veltink Background: Assessment of hand kinematics is important when evaluating hand functioning. Major drawbacks of current sensing glove systems are lack of

Assessment of asymmetric leg loading before and after total hip arthroplasty using instrumented shoes

Background Total hip arthroplasty is a successful surgical treatment in patients with osteoarthritis of the hip. Different questionnaires are used by the clinicians to assess functional capacity and the patient's pain, despite these questionnaires are known to be subjective. Furthermore, many studies agree that kinematic and kinetic parameters are crucial to evaluate and to...

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...

Comparison of muscle activity patterns of transfemoral amputees and control subjects during walking

Background Only few studies have looked at electromyography (EMG) during prosthetic gait. Differences in EMG between normal and prosthetic gait for stance and swing phase were never separately analyzed. These differences can give valuable information if and how muscle activity changes in prosthetic gait. Methods In this study EMG activity during gait of the upper leg muscles of...

Pre-operative ambulatory measurement of asymmetric lower limb loading during walking in total hip arthroplasty patients

Background Total hip arthroplasty is a successful surgical procedure to treat hip osteoarthritis. Clinicians use different questionnaires to assess the patient’s pain and functional capacity. Furthermore, they assess the quality of gait in a very global way.This clinical evaluation usually shows significant improvement after total hip arthroplasty, however, does not provide...

Automatic identification of inertial sensor placement on human body segments during walking

Background Current inertial motion capture systems are rarely used in biomedical applications. The attachment and connection of the sensors with cables is often a complex and time consuming task. Moreover, it is prone to errors, because each sensor has to be attached to a predefined body segment. By using wireless inertial sensors and automatic identification of their positions...

Ambulatory human motion tracking by fusion of inertial and magnetic sensing with adaptive actuation

Over the last years, inertial sensing has proven to be a suitable ambulatory alternative to traditional human motion tracking based on optical position measurement systems, which are generally restricted to a laboratory environment. Besides many advantages, a major drawback is the inherent drift caused by integration of acceleration and angular velocity to obtain position and...

A system for inducing concurrent tactile and nociceptive sensations at the same site using electrocutaneous stimulation

Peter Steenbergen Jan R. Buitenweg Jrg Trojan Esther M. van der Heide Teun van den Heuvel Herta Flor Peter H. Veltink Studies of the interaction between mechanoception and nociception would benefit