Document Detail


Femoral/humeral strength in early African Homo erectus.
MedLine Citation:
PMID:  17977577     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Lower-to-upper limb-bone proportions give valuable clues to locomotor behavior in fossil taxa. However, to date only external linear dimensions have been included in such analyses of early hominins. In this study, cross-sectional measures of femoral and humeral diaphyseal strength are determined for the two most complete early Homo erectus (or ergaster) associated skeletons--the juvenile KNM-WT 15000 and the adult KNM-ER 1808. Modern comparative samples include an adult human skeletal sample representative of diverse body shapes, a human longitudinal growth series, and an adult chimpanzee sample. When compared to appropriately age-matched samples, both H. erectus specimens fall very close to modern human mean proportions and far from chimpanzee proportions (which do not overlap with those of humans). This implies very similar mechanical load-sharing between the lower and upper limbs, and by implication, similar locomotor behavior in early H. erectus and modern humans. Thus, by the earliest Pleistocene (1.7 Ma), completely modern patterns of bipedal behavior were fully established in at least one early hominin taxon.
Authors:
Christopher Ruff
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2007-10-30
Journal Detail:
Title:  Journal of human evolution     Volume:  54     ISSN:  0047-2484     ISO Abbreviation:  J. Hum. Evol.     Publication Date:  2008 Mar 
Date Detail:
Created Date:  2008-02-18     Completed Date:  2008-06-11     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0337330     Medline TA:  J Hum Evol     Country:  England    
Other Details:
Languages:  eng     Pagination:  383-90     Citation Subset:  IM    
Affiliation:
Center for Functional Anatomy and Evolution, Johns Hopkins University School of Medicine, 1830 E. Monument St., Baltimore, MD 21205, USA. cbruff@jhmi.edu
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Animals
Child
Child, Preschool
Female
Femur / physiology*
Hominidae / physiology*
Humans
Humerus / physiology*
Infant
Locomotion / physiology*
Male
Pan troglodytes / physiology
Weight-Bearing / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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