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Human Coxal Bone Sexual Dimorphism and Multislice Computed Tomography: Geometric Morphometric Analysis of 65 Adults

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Abstract:  The authors studied sexually dimorphic differences in coxal shape using geometric morphometric analysis of 15 osteometric landmarks recorded by multislice computed tomography (MSCT), based on three‐dimensional reconstructions of 65 Caucasian adults. Geometric morphometric analysis, principal component analysis, canonical variates analysis, and other discriminant analysis (Goodall’s F‐test and Mahalanobis distance) were performed for the three separate bones of the left innominate (pubis, ilium, and ischium), the modified pubis (pubis and ischiopubic ramus), the modified ilium (ilium and ischial spine), three bone complexes (ischiopubic, iliopubic, and ilio‐ischial), and the complete innominate. A cross‐validation test was also performed. All areas studied were dimorphic, but results for sexual dimorphism in decreasing order were as follows: the modified pubis, followed by the ischiopubic complex, the iliopubic complex and the complete innominate, the pubis, the modified ilium, the ilio‐ischial complex, the ilium, and finally the ischium. These results show the potential of this approach for future anthropological research.

Document Type: Research Article


Affiliations: 1: Service de Radiologie, CHU Toulouse-Rangueil, 1 avenue Professeur Jean Poulhès, 31059 Toulouse Cedex 9, France. 2: Service de Radiologie, CHU Toulouse-Purpan, place du docteur Baylac, 31059 Toulouse, France. 3: Laboratoire d’Anthropobiologie AMIS, UMR 5288 CNRS, Université Paul Sabatier, 37 allées Jules Guesde, 31000 Toulouse, France.

Publication date: May 1, 2012

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