Fig 13. von Mises stresses in the Struthio tarsometatarsus with m. gastrocnemius restricted to the posterior insertions and excluded from the hypotarsus, and m. fibularis longus inserting alone on the hypotarsus.

The Fig depicts A (anterior), B (posterior), C (medial), and D (lateral) views. Peak stresses at the constraints of 76 MPa (E for scale) are lower than if all forces necessary to counteract the F_GRF moment are applied to the hypotarsus.