Fig. 11. The relationships between input angle rotation (Link 2, meral-V) and output angle rotation (Link 3, propodus rotation) measured in high-speed video sequences. (A) The cumulative change in input and output rotation across video frames (combined data from 23 strikes, five individuals). (B) The net input and output rotation (the total rotation across the full input range) across each strike recorded in the same individuals as in A, with each individual represented by a different symbol. The predicted output based on the four-bar model slope (crosses) is shown.