The shoulder is a very special joint. It allows a very great degree of movement to occur at the important junction between the torso and the arm. Notionally a ball and socket joint, the shoulder has been modified so this structure is much less clear than in the hip. The top of the arm bone or humerus is expanded into a large rounded knuckle which is like a ball but the socket is different. ...
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Alternative Medicine,
back injury,
Back Pain,
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Frozen Shoulder,
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physiotherapists,
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Piriformis Syndrome,
rotator cuff muscles,
sciatica
