Document Detail

Biomechanical analysis of vertical climbing in the spider monkey and the Japanese macaque.
MedLine Citation:
PMID:  11102881     Owner:  NLM     Status:  MEDLINE    
Climbing is one of the most important components of primate locomotor modes. We previously reported that the kinesiological characteristics of vertical climbing by the spider monkey and Japanese macaque are clearly different, based on their kinetics and kinematics. In this study, a more detailed analysis using inverse dynamics was conducted to estimate the biomechanical characteristics of vertical climbing in the spider monkey and Japanese macaque. One of the main findings was the difference in forelimb use by the two species. The results of a joint moment analysis and estimates of muscular force indicate that the spider monkey uses its forelimbs to keep the body close to the substrate, rather than to generate propulsion. The forelimb of the Japanese macaque, on the other hand, likely contributes more to propulsion. This supports the idea that "forelimb-hindlimb differentiation" is promoted in the spider monkey. The estimated muscular force also suggests that the spider monkey type of climbing could develop the hindlimb extensor muscles, which are important in bipedal posture and walking. As a result, we conclude that the spider monkey type of climbing could be functionally preadaptive for human bipedalism. This type of climbing would develop the hip and knee extensor muscles, and result in more extended lower limb joints, a more erect trunk posture, and more functionally differentiated fore- and hindlimbs, all of which are important characteristics of human bipedalism.
E Hirasaki; H Kumakura; S Matano
Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  American journal of physical anthropology     Volume:  113     ISSN:  0002-9483     ISO Abbreviation:  Am. J. Phys. Anthropol.     Publication Date:  2000 Dec 
Date Detail:
Created Date:  2001-02-15     Completed Date:  2001-02-15     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0400654     Medline TA:  Am J Phys Anthropol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  455-72     Citation Subset:  IM    
Copyright Information:
Copyright 2000 Wiley-Liss, Inc.
Laboratory of Biological Anthropology, Department of Human Sciences, Osaka University, Osaka 565-0871, Japan.
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MeSH Terms
Cebidae / physiology*
Computer Simulation
Forelimb / physiology
Hindlimb / physiology
Joints / physiology
Macaca / physiology*
Motor Activity / physiology*

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