[Jeff]

Yoda - I agree that it possible to execute the three different hinging actions under static conditions (keeping the left shoulder still) - one simply rotates the left humerus to a variable degree as one mimics the followthrough action. However, I am curious as to whether the same phenomenon occurs during a "real life" golf swing's followthrough phase - as to whether the different degree of variation in rotary angulation of the left arm flying wedge seen in the three different hinging actions is solely due to variations in the degree of rotation of the left humerus or whether they are also partly due to i) variations in the spatial arc of movement of the left shoulder socket and/or ii) variations in temporal sequencing of the left shoulder socket movement in space (instantaneous temporal variations in shoulder socket locus during its arc of movement) during the followthrough phase of the golf swing.

Jeff.