abstract introduction materials & methods results ...

8 downloads 0 Views 616KB Size Report
specimens from the Robert J. Terry Anatomical Skeletal. Collection, including ... the project, and Dr. Joseph Hefner for his advice and support. 1. Duray, S.M. ...
The Utility of Postcranial Nonmetric Traits in Ancestry Analysis Micayla Spiros, MSc*, Institute of Archaeology, University College London, 31-34 Gordon Square, London WC1H 0PY, United Kingdom; Carolyn Rando, PhD, Institute of Archaeology, University College London, 31-34 Gordon Square, London WC1H 0PY, United Kingdom

TRAITS & CORRESPONDENCE ANALYSES DISCUSSION & LIMITATIONS

ABSTRACT The aim of this study was to create a novel approach to analyzing postcranial nonmetric traits and to view how these variations may be used to estimate the ancestry of individuals in a forensic context. This project developed a visual method for scoring a suite of postcranial nonmetric traits and compared the traits between two ancestral groups. Addressing a large gap in forensic anthropological literature regarding the usage of postcranial nonmetric traits, this project will contribute to future approaches to ancestry estimation.

INTRODUCTION Nonmetric traits are morphological changes in the skeleton with underlying genetic causation. Because these traits are inherently genetic, there should be variability between global populations. Using advanced statistical methods, cranial nonmetric traits have been successful in quantifying the difference between ancestral groups. 1,2,3,4 However, postcranial nonmetric traits, while often recorded, have not been explored for their utility as ancestral group identifiers. This project aims to rectify this gap in the literature and establish whether there is any potential in using postcranial traits for ancestry estimation.

Figure 1. Posterior Bridging Drawing (M. Spiros 2018) & Correspondence Analysis Biplot of Posterior Bridging

Figure 2. Double Superior Articular Facet Drawing (M. Spiros 2018) & Correspondence Analysis Biplot of Double Superior Articular Facet

Figure 3. Accessory Transverse Foramen Drawing (M. Spiros 2018) & Correspondence Analysis Biplot of Accessory Transverse Foramen

Figure 4. Spinous Process Bifurcation Drawing (M. Spiros 2018) & Correspondence Analysis Biplot of C3 Spinous Process Bifurcation

Figure 5. Spinous Process Bifurcation Drawing (M. Spiros 2018) & Correspondence Analysis Biplot of C4 Spinous Process Bifurcation

Of the postcranial traits studied, five of the traits had statistically significant differences between the two ancestral groups when p

Suggest Documents