Document Detail

Centre of gravity of the body during the ontogeny of chimpanzee bipedal walking.
MedLine Citation:
PMID:  8953755     Owner:  NLM     Status:  MEDLINE    
Bipedal walking was studied in chimpanzees between 1 and 19 years of age by measuring the external energy generated by the movement of the centre of gravity of the body. The 'recovery' of external energy in infant chimpanzees less than five years of age is smaller than in juveniles from 5 to 19 years of age. During the single stance phase, the short, flexed hindlimb of chimpanzees younger than 5 years is not able to lift the body centre of gravity high enough, so that these infants have a considerable energy output during bipedal walking. Extension of the hindlimb is one of the bases for energy economy in human bipedalism. The development of this low-energy-cost mechanism is an important component of the evolution of human bipedalism.
T Kimura
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Folia primatologica; international journal of primatology     Volume:  66     ISSN:  0015-5713     ISO Abbreviation:  Folia Primatol.     Publication Date:  1996  
Date Detail:
Created Date:  1997-01-21     Completed Date:  1997-01-21     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0370723     Medline TA:  Folia Primatol (Basel)     Country:  SWITZERLAND    
Other Details:
Languages:  eng     Pagination:  126-36     Citation Subset:  IM    
Department of Anthropology, Graduate School of Science, University of Tokyo, Japan.
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MeSH Terms
Gravity Sensing / physiology*
Hindlimb / physiology*
Hip Joint / physiology
Locomotion / physiology*
Pan troglodytes / physiology*

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