From a mechanical point of view, the wrist represents the most complex joint in the body, providing a large range of motion in the flexion-extension (FE) and radial-ulnar-deviation (RUD) planes. Anatomically, the wrist could be divided into two carpal rows. Deeper insight into wrist biomechanics is highly desirable, because the complex wrist structure causes a variety of possible injuries and t...

The wrist is a complex anatomical structure composed of 3 joints: radiocarpal, midcarpal and distal radioulnar joints these joints provide relatively little bony stability. The stability of the wrist is provided by the soft tissues. Rheumatoid arthritis is a disease of the soft tissues. It affects the synovium and therefore most of these stabilizing structures of the wrist causing pain, deformi...

BACKGROUND Some risk factors for low-energy wrist fracture have been identified. However, self-reported measures such as health-related quality of life (HRQOL) have not been examined as potential risk factors for wrist fracture. The aims of this study were to compare HRQOL prior to a low-energy wrist fracture in elderly patients (>or= 50 years) with HRQOL in age- and sex-matched controls, and t...

National Cooperative Growth Study substudy VII was conducted 1) to compare standardized hand-wrist and knee bone age determinations in pubertal children treated with growth hormone (GH); 2) to compare local determinations of bone ages with centrally determined bone ages; 3) to relate the response to GH therapy to the bone age determinations; and 4) to ascertain the predictive value of each type...

Control of Wrist and Arm Movements of Varying Difficulties. (December 2010) Jason Baxter Boyle, B.S., Texas A&M University Chair of Advisory Committee: Dr. Charles H. Shea Three experiments compared wrist and arm performance in a cyclical Fitts’ target task. The purpose of Experiment I was to determine if movement kinematics differed for wrist/elbow flexion/extension movements to targets of var...

BACKGROUND Trigger wrist is a rare condition first described by Marti in 1960, and various causes have been reported. The condition mostly occurs with finger flexion and extension, and rarely with flexion and extension of the wrist itself. Avascular necrosis of the capitate is also a rare condition, first described by Jönsson in 1942. While some reports of this condition have been published, li...

Prevalence rates of carpal tunnel syndrome (CTS) in the wheelchair user population are high. One of the possible causes of CTS in this population is the movement pattern of the wrist during handrim wheelchair propulsion, which could include large wrist joint angles and wrist/finger flexor activity. Combined with the repetitive character of the movement, this could, in time, be detrimental to th...

AIM Describe the use of 320 row detector CT scanner for 4 Dimensional CT acquisition on a specialized platform designed for wrist kinematic evaluation and to demonstrate the utility of 4 Dimensional CT in the assessment of wrist biomechanics before and after surgical repair. MATERIALS AND METHODS Six wrists (1 volunteer and 4 patients) were uniformly imaged with conventional X-rays and 4 Dime...

When humans rotate their wrist in flexion-extension, radial-ulnar deviation, and combinations, the resulting paths (like the path of a laser pointer on a screen) exhibit a distinctive pattern of curvature. In this report we show that the passive stiffness of the wrist is sufficient to account for this pattern. Simulating the dynamics of wrist rotations using a demonstrably realistic model under...