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Functional capabilities of modern and fossil hominid hands: Three-dimensional analysis of trapezia

Tocheri, M.W. ; Marzke, M.W. ; Liu, D. ; Bae, M. ; Jones, G.P. ; Williams, R.C. ; Razdan, A.

American journal of physical anthropology, 2003-10, Vol.122 (2), p.101-112 [Periódico revisado por pares]

Hoboken: Wiley Subscription Services, Inc., A Wiley Company

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  • Título:
    Functional capabilities of modern and fossil hominid hands: Three-dimensional analysis of trapezia
  • Autor: Tocheri, M.W. ; Marzke, M.W. ; Liu, D. ; Bae, M. ; Jones, G.P. ; Williams, R.C. ; Razdan, A.
  • Assuntos: 3D modeling ; Animals ; Anthropological methods ; Anthropology ; Comparative analysis ; Fossils ; Gorilla gorilla ; Hand - anatomy & histology ; Hand - physiology ; Hand Strength - physiology ; Hominidae ; Hominids ; Human body ; Human paleontology ; Humans ; Methodology and general studies ; Modelling ; Morphology ; Pan troglodytes ; Physical anthropology ; power grip ; precision grip ; Prehistory and protohistory ; tool manufacture ; tool use
  • É parte de: American journal of physical anthropology, 2003-10, Vol.122 (2), p.101-112
  • Notas: National Science Foundation - No. IIS-998016
    ArticleID:AJPA10235
    istex:FEEAC3137EE098A2C40738CC071AF0BBA0577E9B
    ark:/67375/WNG-130L9ZQN-4
    Social Sciences and Research Council of Canada
    ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-1
    content type line 23
    ObjectType-Article-1
    ObjectType-Feature-2
  • Descrição: Three‐dimensional (3D) trapezium models from Homo sapiens, Gorilla gorilla, Pan troglodytes, Australopithecus afarensis (A.L.333‐80), and Homo habilis (O.H.7‐NNQ) were acquired through laser digitizing. Least‐square planes were generated for each articular surface, and the angles between the planes were compared. Each extant species displays an overall pattern that distinguishes it from the others. The observed angles in G. gorilla and P. troglodytes are more similar to one other than either is to H. sapiens. Our results, obtained from using new 3D modeling and analytical tools, raise interesting questions about the functional capabilities of the fossil trapezia. Multivariate statistical analyses indicate that A.L.333‐80 is morphologically more similar to that of modern humans, whereas the O.H.7 trapezium is more similar to that of the gorilla. Significant differences between A.L.333‐80 and the extant species occur, but some similarities to humans suggest the ability to form the distinctively human forceful pad‐to‐side and three‐jaw chuck grips. Some key morphological differences from humans highlighted and quantified by our research suggest limitations in the functional capabilities of the O.H.7 trapezium, particularly in those that facilitate pronation at the base of the second metacarpal. If the O.H.7 trapezium represents part of the hand responsible for manufacturing and using the stone tools found at Olduvai, our results suggest that the hand manipulated the stones in a way for which we have no modern analog. Alternative considerations are that the O.H.7 trapezium is not representative of other trapezia from its species (i.e., N = 1), or that it represents another primate or hominid species. Am J Phys Anthropol, 2003. © 2003 Wiley‐Liss, Inc.
  • Editor: Hoboken: Wiley Subscription Services, Inc., A Wiley Company
  • Idioma: Inglês
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