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Auteur (up) Tardieu, C.; Aurengo, A.; Tardieu, B. openurl 
  Titre New Method Of 3-Dimensional Analysis Of Bipedal Locomotion For The Study Of Displacements Of The Body And Body-Parts Centers Of Mass In Man And Nonhuman-Primates – Evolutionary Framework Type Article scientifique
  Année 1993 Publication American Journal Of Physical Anthropology Revue Abrégée  
  Volume 90 Numéro 4 Pages 455-476  
  Mots-Clés  
  Résumé The current biomechanical interpretation of the chimpanzee's bipedal walking argues that larger lateral and vertical displacements of the body center of mass occur in the chimpanzee's ''side-to-side'' gait than in the human striding gait. The evolutionary hypothesis underlying this study is the following: during the evolution of human bipedalism one of the necessary changes could have been the progressive reduction of these displacements of the body center of mass. In order to quantitatively test this hypothesis, it is necessary to obtain simultaneously the trajectories of the centers of mass of the whole body and of the different body parts. To solve this problem, a new method of three-dimensional analysis of walking, associated with a volumetric modelling of the body, has been developed based on finite-element modelling. An orthogonal synchrophotographic device yielding four synchronous pictures of the walking subject allows a qualitative analysis of the photographic sequences together with the results of their quantitative analysis. This method was applied to an adult man, a 3-year-old girl and a 9-year-old male chimpanzee. Our results suggest that the trajectory of the body center of mass of the human is disting  
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