Editors Note: This is a continuing series of articles on our bodies, how they function, possible problems and solutions. Go to http://www.thesouthern.com/lifestyles/mindbody to read previous articles. While just about everyone knows what a shoulder is and can readily point to their shoulder, a precise definition appears to have eluded anatomists. There is a shoulder blade (scapula bone), a shoulder joint (site of connection between the arm and shoulder glenohumoral joint) and a tip of the shoulder (the outward/lateral projecting point of the shoulder acromion) but it is quite difficult to arrive at a specific definition of the shoulder in many anatomy books. What can be considered to form the skeletal structure of the shoulder includes the scapula, clavicle (collar bone) and head (rounded upper portion) of the humerus bone of the arm. The rounded head of the humerus projects into a space in the scapula called the glenoid cavity to form the glenohumeral joint. The clavicle protrudes across the upper region of the chest, just beneath the skin, from the midline breast bone (sternum) to the tip of the scapula (acromion). In this way, the clavicle serves as a strut providing structural support for the glenohumral joint and maintains this … Continue reading
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