A key feature of skilled object control is the ability to correct performance errors. This process is not straightforward for unstable objects (e.g., inverted pendulum or "stick" balancing) because the mechanics of the object are sensitive to small control errors, which can lead to rapid performance changes. In this study, we have characterized joint recruitment and coordination processes in an...

OBJECTIVE Musculoskeletal US is being increasingly used for the assessment of synovitis, although questions remain about its reliability. One potential factor affecting reliability is the lack of consensus of image acquisition methods such as using different joint positions. This may have an implication on the reproducibility of studies that use US as an outcome measure. The aim of this study w...

We address the synthesis of serial chain spatial mechanisms with revolute joints in which the rotations about the joints are coupled via cables and pulleys. Such coupled serial chain mechanisms o er a middle ground between the more versatile and compact serial chains and the simpler closed chains by combining some of the advantages of both types of systems. In particular, we focus on the synthe...

A 45-year-old male presented to the emergency room of our institution complaining of severe pain around the left elbow. While playing volleyball, he slipped down with his left arm hit between the floor and his body. He complaind of strong pain from left elbow to hand, and active motion of elbow and wrist joint was impossible. His forearm was held in supinated position. On X-ray examination, rad...

OBJECTIVES Choice of accelerometer wear-site may facilitate greater compliance in research studies. We aimed to test whether a simple method could automatically discriminate whether an accelerometer was worn on the hip or wrist from free-living data. DESIGN Cross-sectional. METHODS Twenty-two 10-12y old children wore a GENEActiv at the wrist and at the hip for 7-days. The angle between the ...

By manipulating trunk angle in ergometer cycling, we studied the effect of body configuration on muscle recruitment and joint kinematics. Changing trunk angle affects the length of muscles that span the hip joint. It is hypothesized that this affects the recruitment of the muscles directly involved, and as a consequence of affected joint torque distributions, also influences the recruitment of ...

In this paper, based on the finite element method, stresses of radius and ulna are analyzed at different flexion angles elbow when playing tennis. The model is presented for position with 0°, 25°, 60°, 80° according to normal human arm bone. model, whole metacarpals, radius, ulna, humerus scapula considered. calculation simplified by setting metacarpals as rigid bodies using Tie binding constra...

background: heat therapy is one of the natural treatments that can affect the information transferred by the proprioceptive receptors. heat has an effect on the conduction velocity of peripheral nerves, but the exact effect of two kinds of deep and superficial heat on the joint position sense is not known clearly. the present study aimed to compare the effect of deep and superficial heat on ank...