Background: Subacromial impingement syndrome is considered by many to be the most common of the musculoskeletal conditions affecting the shoulder. It is based on a hypothesis that acromial irritation leads to external abrasion of the bursa and rotator cuff. Objectives: The aim of this paper is to review the evidence for the acromial irritation theory and in doing so challenge the rationale for ...

Understanding the morphology of the scapula of Gorilla and Pan is crucial to scientists who find fossil ape scapulae and need to assign them to taxa and interpret the functional significance of their morphology. While differences between the shapes of Gorilla and Pan scapulae are known, a morphological link between locomotor patterns and scapular shape has yet to be determined. Using geometric ...

OBJECTIVE The aims of this study were to (1) examine the pattern of experimental pain responses in the affected and nonaffected extremities in patients with shoulder pain and (2) explore the intraindividual association between sensitization states derived from experimental pain testing. METHODS Experimental pain responses from 58 patients with shoulder pain (17 women, aged 18 to 52 y) were co...

Historically, many causes have been proposed for rotator cuff conditions. The most prevalent theory is that the rotator cuff tendons, especially the supraspinatus, make contact with the acromion and coracoacromial ligament, resulting in pain and eventual tearing of the tendon. However, more recent evidence suggests that this concept does not explain the changes in rotator cuff tendons with age....