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In vivo motions at the sternocostal joints in A. mississippiensis from XROMM animations. Pump handle (red), calliper (green), and bucket handle (blue) rotation about the sternocostal joint (joint coordinate system in Fig. 2C,D) in (A) sternal rib 1 and (B) sternal rib 4. Graphs show means±s.d. (N=5 breaths).
