Abstract # 7884 Poster # 59:

Scheduled for Saturday, August 26, 2017 06:00 PM-08:00 PM: (National Ballroom AB) Poster Presentation


BENDING AFTER BREAKING: AN ANALYSIS OF THE STRENGTH PROPERTIES OF LONG BONES IN SAIMIRI SCIUREUS FROM MUSEUM CONTEXT USING BONE

S. S. Legge, S. R. Sater and R. L. Luther
Macalester College, Dept of Anthropology, St. Paul, MN 55105, USA
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Traumatic injuries to bone are not uncommon in free-ranging primate populations. Our understanding of the healing and strength properties of those bones are limited. This project establishes a non-destructive analysis protocol to evaluate strength property patterns among long bones of Saimiri sciureus (Common squirrel monkey) from museum context. 54 long bones were scanned with x-ray micro-CT and converted into tiff stacks for strength property analysis using the BoneJ plug-in for ImageJ. Paired bones, including one uninjured bone and one bone presenting a healed/healing callous, were scanned when possible. In addition, long bones from individuals with no traumatic injuries were scanned in order to develop baseline values for cortical strength properties. Medial-lateral and anterior-posterior area moments of inertia and polar moments of inertia were calculated at 10% length intervals along the long axis of the bones to determine the resistance to bending and twisting forces, respectively. Callous locations corresponded with increased resistance to bending and twisting forces along with increased cortical thickness in affected segments. However, no clear pattern of statistically significant differences was discerned among pairs of broken and unbroken bones for strength property measures. This protocol yields data directly related to stress factors of locomotion in wild primates through non-destructive techniques and utilizing museum collection. Additionally, these data aid in our understanding of how primates heal from traumatic injuries to bone in the wild.