The aim of this study was to use a surface electromyographic (sEMG) technique with a ballistic isotonic shoulder joint adduction movement to determine the function of the neuromuscular compartments (NMCs) within the pectoralis major, deltoid, and latissimus dorsi muscles. Sixteen male subjects (mean age 22 yr) with no known history of shoulder pathologies volunteered to participate. Timing and ...

This paper presents the state-of-the-art on the 3D functional modelling of the hip and shoulder, and analyses critical aspects on this subject. For the accurate human hip and shoulder model, we need to pay a careful consideration to the correct material properties about organs (bones, cartilages, ligaments, muscles, and skins) and joint mechanics. The survey of functional modelling and our prop...

A collarwitharm cuffs forreducl|' tion of bilateral shoulder subluxation was developed for a 6lyear-old businessman who had good hand function, but in whom polymyositis with atrophy of the proximal muscles bilaterally hadresulted in severe shoulder subluxation and pain (Figure l). Other slings designed to reduce shoulder subluxation were unacceptable for our patient for the following reasons: l...

Pancoast’s syndrome consists of pain in the arm and shoulder, atrophy of hand muscles, and Homer’s syndrome [1]. The initial symptom of Pancoast’s syndrome generally is pain in the shoulder. In some patients, only partial characteristics could be observed. It occurs mainly in patients with a superior pulmonary sulcus tumor invading the lower brachial plexus roots and the cervicothoracic sympath...

Shoulder instability is a major complaint in overhead athletes. The shoulder joint stability is provided mainly by rotator cuff muscles. The Electromechanical Delay (EMD) may be an important parameter in the responsiveness of a muscle. The aim of this study was to measure and compare the infraspinatus EMD in healthy and unstable shoulders and in dominant and non-dominant shoulders. We did not f...

Scapular dyskinesis is an alteration in the normal position or motion of the scapula during coupled scapulohumeral movements. It occurs in a large number of injuries involving the shoulder joint and often is caused by injuries that result in the inhibition or disorganization of activation patterns in scapular stabilizing muscles. It may increase the functional deficit associated with shoulder i...

In the past 10 years, computers and cellphones have become one of the most important factors in our lives, and one which has a tremendously negative impact on our muscles. Muscle tension may be one of the causes of sleep disturbance. Tension in the shoulders and neck can affect blood circulation to the muscles. This research uses a dry needling treatment to reduce muscle tension in order to det...

[Purpose] We investigated the effects of shoulder flexion loaded by an elastic tubing band during squat exercises, by assessing electromyographic activities of the gluteus maximus and gluteus medius. [Subjects] In total, 17 healthy males were recruited. [Methods] Participants performed squat exercises with and without shoulder flexion loaded by a tubing band. Gluteal muscle activities during th...

The purpose of this study was to determine the effects of shoulder muscle fatigue on three dimensional scapulothoracic and glenohumeral kinematics. Twenty healthy subjects participated in this study. Three-dimensional scapulothoracic and glenohumeral kinematics were determined from electromagnetic sensors attached to the scapula, humerus, and thorax. Surface electromyographic (EMG) data were co...