We describe a new methodology for the evaluation of bilateral asymmetry in the humerus. It consists of the virtual comparison of three-dimensional (3D) digital models of the right and left humeri of one individual from the Middle Ages. The 3D geometric models, obtained using a NextEngine laser scanner, were oriented in PolyWorks® 10.1. In the same software, a mirror image of the left humerus was produced. Proximal and distal epiphyses of the oriented humeri were cut at the 15% and 85% points of the humerus’ physiological length in order to individually compare the three obtained parts (proximal epiphysis, distal epiphysis and diaphysis). The epiphyses were directly superimposed and the deviation quantified by inspection analysis. For the diaphysis, the best fit cylinder of the mirrored left humerus was created and used as a reference shape for the inspection analysis. The inspection analysis allows us to identify the areas where the two humeri differ morphometrically and to quantify the differences with high precision.

Evaluating humeral bilateral asymmetry by means of a virtual 3D approach.

BENAZZI, STEFANO;ORLANDI, MARCO;BONETTI, COSTANZA;GRUPPIONI, GIORGIO
2011

Abstract

We describe a new methodology for the evaluation of bilateral asymmetry in the humerus. It consists of the virtual comparison of three-dimensional (3D) digital models of the right and left humeri of one individual from the Middle Ages. The 3D geometric models, obtained using a NextEngine laser scanner, were oriented in PolyWorks® 10.1. In the same software, a mirror image of the left humerus was produced. Proximal and distal epiphyses of the oriented humeri were cut at the 15% and 85% points of the humerus’ physiological length in order to individually compare the three obtained parts (proximal epiphysis, distal epiphysis and diaphysis). The epiphyses were directly superimposed and the deviation quantified by inspection analysis. For the diaphysis, the best fit cylinder of the mirrored left humerus was created and used as a reference shape for the inspection analysis. The inspection analysis allows us to identify the areas where the two humeri differ morphometrically and to quantify the differences with high precision.
On the Road to Reconstructing the Past. Computer Applications in Archaeology 2008 (CAA Budapest) conference proceedings.
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BENAZZI S; ORLANDI M.; BONETTI C; GRUPPIONI G.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/110144
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