Three-dimensional anatomy of the ostrich (Struthio camelus) knee joint

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Abstract

The three-dimensional anatomy of the ostrich (Struthio camelus) knee (femorotibial, femorofibular, and femoropatellar) joint has scarcely been studied, and could elucidate certain mechanobiological properties of sesamoid bones. The adult ostrich is unique in that it has double patellae, while another similar ratite bird, the emu, has none. Understanding why these patellae form and what purpose they may serve is dually important for future studies on ratites as well as for understanding the mechanobiological characteristics of sesamoid bone development. For this purpose, we present a three-dimensional anatomical study of the ostrich knee joint, detailing osteology, ligaments and menisci, and myology. We have identified seven muscles which connect to the two patellae and compare our findings to past descriptions. These descriptions can be used to further study the biomechanical loading and implications of the double patella in the ostrich.

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Chadwick, K. P., Regnault, S., Allen, V., & Hutchinson, J. R. (2014). Three-dimensional anatomy of the ostrich (Struthio camelus) knee joint. PeerJ, 2014(12). https://doi.org/10.7717/peerj.706

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