Fig 6. Average motion in degrees at the elbow joint coordinate system (JCS) for a R. norvegicus step cycle.

Above the graph is a representation of the forelimb posture relative to the step cycle. Here, all ten trials from all three rats were binned for every 5% of the step cycle. Given the tiny rotational movements at the Y- and X-axes for the elbow JCS, only the Z-axis rotations are shown. Blue = Z-axis (flexion/extension).