BACKGROUND Altered neuromuscular control due to compromised joint position sense may contribute to recurrent shoulder instability. OBJECTIVE The purpose of the present study was to examine whether individuals with anterior shoulder instability exhibit larger shoulder position sense errors than those with healthy shoulders in both passive matching and active positioning. DESIGN This was a be...

This paper proposes a shoulder inverse kinematics (IK) technique. Shoulder complex is comprised of the sternum, clavicle, ribs, scapula, humerus, and four joints. The shoulder complex shows specific motion pattern, such as Scapulo humeral rhythm. As a result, if a motion of the shoulder isgenerated without the knowledge of kinesiology, it will be seen as un-natural. The proposed technique gener...

Osteoarthritis (O.A) affects over 50 million Americans. This includes mostly O.A of the shoulder, hip, and knee. Shoulder osteoarthritis (O.A) has been demonstrated in cadaver and radiographic studies to affect up to 33% of patients over the age of 60 [1]. Patients with shoulder O.A have pain, crepitus, decreased ability to place their hand at a desired point in space and loss of motion, severe...

OBJECTIVE In overhead sports such as volleyball, baseball, or tennis shoulder problems are very common. The aim of this study was to identify features which may correlate with shoulder problems in volleyball attackers. METHODS 30 competitive volleyball attackers (mean age 25 years) were included in the study; 15 were suffering from shoulder pain and 15 had no history of shoulder pain. The res...

BACKGROUND Acromial morphology has previously been defined as a risk factor for some shoulder pathologies. Yet, study results are inconclusive and not all major shoulder diseases have been sufficiently investigated. Thus, the aim of the present study was to analyze predictive value of three radiological parameters including the critical shoulder angle, acromion index, and lateral acromion angle...

Shoulder joint is a complex integration of soft and hard tissues. It plays an important role in performing daily activities and can be considered as a perfect compromise between mobility and stability. However, shoulder is vulnerable to complications such as dislocations and osteoarthritis. Finite element (FE) models have been developed to understand shoulder injury mechanisms, implications of ...

The science of rehabilitation showed, in most cases, that repeated movements of human members can to help the patient regain the functions of the member injury. Robots for these tasks can be more efficient in performing these exercises than humans. Robotic systems for rehabilitation can be generally used to record information like position, trajectory, force and velocity exploiting the motor pe...

The objective of this study was to quantify the mechanical load on the low back and shoulders during pushing and pulling in combination with three task constraints: the use of one or two hands, three cart weights, and two handle heights. The second objective was to explore the relation between the initial and sustained exerted forces and the mechanical load on the low back and shoulders. Detail...

Shoulder pain is a common musculoskeletal ailment. The process of determining the etiology of shoulder pain can be difficult. The differential diagnoses include: both intracapsular and extracapsular lesions; and neurologic, vascular, postural, and visceral causes. We present an unusual case of shoulder pain accompanied by loss of shoulder range of motion (ROM), initially thought to be caused by...