From the Diploma in Functional Performance…
For each ‘feeling’ at a joint, there are five different possible ways of getting that feeling to occur.
For example, the feeling of flexion at the elbow is one where the joint feels a squeeze on the inside of the elbow joint. In this instance the distal bones are the radial ulna bones, and the proximal bone is the humerus.
The main way, which is shown in most anatomy books, would be proximal still and distal moving. So in this case it would be the humerus being still and the radial/ulna bones turning posteriorly.
Having proximal still and distal moving is an unusual way, in terms of functional movement. The other unusual way of creating a joint feeling is having the proximal move while the distal is still. In this case we would then need to keep the radial/ulna still and anteriorly rotate the humerus.
