Objective: Subacromial impingement syndrome has been described as the most common form of shoulder pathology. The literature suggests that the aetiology of subacromial impingement is multifactorial. These causes include anatomical and mechanical factors, rotator cuff pathology, glenohumeral instability, restrictive processes of the glenohumeral joint, imbalance of the muscles controlling the sc...

A user’s posture at a computer workstation, especially wrist posture, is determined by the keyboard angle. Most commercially available keyboards have built-in positive slope that requires user to extend their approximately 20° when typing. The purpose of this study find negative angles minimize extension for both sitting and standing workstations. In study, we compared upper limb working postur...

Proper execution of voluntary movement requires a sensorimotor transformation based on the initial limb state. For example, successfully reaching to a stable target requires the recruitment of different muscle groups depending on limb position at movement initiation. To test whether this transformation could occur at the spinal level, we stimulated the cervical spinal cord of anesthetized monke...

UNLABELLED Work-related musculoskeletal disorders are increasing due to industrialisation of work processes. Task variation has been suggested as potential intervention. The objectives of this study were to investigate, first, the influence of task variation on electromyographic (EMG) manifestations of shoulder muscle fatigue and discomfort; second, noticeable postural shoulder changes over tim...

[Purpose] The aim of this study was to evaluate the reliability of upper quadrant posture analysis using an ultrasound-based three-dimensional motion analyzer. [Subjects] Subjects were 72 healthy young adults. [Methods] Neck inclination angle formed by a line connecting C7 and the tragus with a horizontal line, angle of the shoulder formed by a line connecting C7 and the acromial angle with a h...

Approximately 84% of all stroke patients with hemiplegia will experience shoulder injury and pain. The importance of maintaining proper posture while positioning and transferring a stroke patient is key to decreasing risk for shoulder injury. Shoulder subluxation injury post-stroke is a consequence of sustained hemiplegia and spasticity. Current research evidence suggests that using therapies s...

Neural coupling of proximal and distal upper limb segments may have functional implications in the recovery of hemiparesis after stroke. The goal of the present study was to investigate whether the stretch reflex response magnitude of spastic finger flexor muscles poststroke is influenced by sensory input from the shoulder and the elbow and whether reflex coupling of muscles throughout the uppe...

Figure 1 Kneeling trunk rotation (a) start position (b) final position. Sports such as tennis, golf, baseball, and hockey each involve a tremendous amount of trunk rotation. It is not just striking sports, but also throwing, kicking, running, swimming, skiing, etcwhichall require yourbody to rotate throughyour core. In order to transmit forces from your bigger, stronger leg muscles to your arms...

background: today, the prevalence of musculoskeletal disorders is one of the health issues of concern in any society. one of the main causes of musculoskeletal disorders and conditions can be named unpleasant working conditions. the aim of this study was to report the prevalence of musculoskeletal disorders including working postures and lifting-related musculoskeletal disorders among workers o...