Jonathan Blood Smyth

The elbow is the central joint of the arm and divides it up into two convenient halves, looking initially merely like a backwards and forwards hinge. On closer examination the elbow shows itself to be a remarkably clever and multi-talented joint. The humerus or upper arm bone connects with the two lower arm bones, the radius and the ulna. The elbow joint itself is formed from the lower end of the humerus and the upper end of the ulna which makes up the bony point of the elbow which can be easily felt. The upper end of the ulna has a ladle like shape which carries in its bowl the end of the humerus.

Physiotherapists and orthopaedic surgeons spend significant amounts of time and effort treating shoulder injuries and conditions, of which there are many. The shoulder, an unstable joint with a very large range of movement, the greatest in the body, is vulnerable in many situations to injury or mechanical stresses. Its instability means it can be relatively easily dislocated in a fall or activity at end range. We use the arm to save ourselves if we fall, making fractures common and heavy or overhead work over time leads to rotator cuff tears.