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First published online March 22, 2004
Journal of Experimental Biology 207, 1577-1584 (2004)
Published by The Company of Biologists 2004
doi: 10.1242/jeb.00890
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On the scaling of mammalian long bones

Guilherme J. M. Garcia and Jafferson K. L. da Silva*

Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Caixa Postal 702, CEP 30123-970, Belo Horizonte – MG, Brazil

* Author for correspondence (e-mail: jaff{at}fisica.ufmg.br)

Accepted 19 January 2004

Although there is much data available on mammalian long-bone allometry, a theory explaining these data is still lacking. We show that bending and axial compression are the relevant loading modes and elucidate why the elastic similarity model failed to explain the experimental data. Our analysis provides scaling relations connecting bone diameter and length to the axial and transverse components of the force, in good agreement with experimental data. The model also accounts for other important features of long-bone allometry.

Key words: bone, allometry, mammals, stress, buckling, locomotion, muscle, force


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© The Company of Biologists Ltd 2004