Honors College Thesis

 

Flexion and Standing Extension in the Articulations of Alpacas (Lama pacos) and Llamas (Lama glama) Public

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  • Objective- To determine the average flexion and standing extension measurements for each limb articulation of alpacas and llamas and determine if there was any significant difference between the species’ measurements. Animals- Alpacas (n=6) and llamas (n=6) of the Oregon State University teaching herd. Methods- Each articulation was measured four times in standing extension and in maximal passive flexion. Measurements were taken by two individuals, taking two measurements of each articulation. Results- Average measurements for the shoulder, elbow, carpus, metacarpophalangeal, hip, stifle, hock, and metatarsophalangeal articulations in maximal flexion and standing extension were obtained. Flexion measurements showed no significant difference between the two species. In standing extension, the elbow (p=0.0313) and the hock (p=0.0214) showed a significant difference between the alpaca and the llama measurements. The rest of the articulations were found to have no significant difference. Conclusion- Except for when dealing with the elbow and the hock in extension, the angle of a limb articulation can be considered the same for alpacas and llamas in flexion and extension. This has important relevance for veterinary surgeons when assessing joint mobility, conformation, and appropriate angles for arthrodesis. Expansion upon this research by radiography or CT of joints would be beneficial.
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