Publications by authors named "J Hans H Arendzen"
Background: A validated method to assess sitting and standing posture in a clinical setting is needed to guide diagnosis, treatment and evaluation of these postures. At present, no systematic overview of assessment methods, their clinimetric properties, and usability is available.
Objective: The objective of this study was to provide such an overview and to interpret the results for clinical practice.
Article Synopsis
- After a stroke, many patients struggle with selective muscle activation in their arms, which impacts their function and is not routinely measured.
- This study aimed to validate a method for quantifying selective muscle activation in wrist flexor and extensor muscles using electromyography in post-stroke patients compared to healthy individuals.
- The findings reveal lower Activation Ratios for post-stroke patients, indicating a loss of selective muscle activation that could help guide and evaluate therapy aimed at improving arm function.
Study Design: Psychometric study with 2-week interval.
Introduction: Musculoskeletal hand complaints are common among manual workers. Mismatch between anthropometric hand features and tasks can affect the ability to perform hand activities, with an increased risk of complaints.
Background: The mechanism and time course of increased wrist joint stiffness poststroke and clinically observed wrist flexion deformity is still not well understood. The components contributing to increased joint stiffness are of neural reflexive and peripheral tissue origin and quantified by reflexive torque and muscle slack length and stiffness coefficient parameters.
Objective: To investigate the time course of the components contributing to wrist joint stiffness during the first 26 weeks poststroke in a group of patients, stratified by prognosis and functional recovery of the upper extremity.
The dynamic behavior of the wrist joint is governed by nonlinear properties, yet applied mathematical models, used to describe the measured input-output (perturbation-response) relationship, are commonly linear. Consequently, the linearly estimated model parameters will depend on properties of the applied perturbation properties (such perturbation amplitude and velocity). We aimed to systematically address the effects of perturbation velocity on linearly estimated neuromechanical parameters.
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