Stresses in Leg Tendons of Birds

Stresses in Leg Tendons of Birds STRESSES IN LEG TENDONS OF BIRDS by G. VAN SNIK1, M. OLMOS2, A. CASINOS2* and J.A. PLANELL3 (1 Department of Experimental Animal Morphology and Cell Biology, Agricultural University, Marijkeweg 40, 6709 PG Wageningen, The Netherlands, 2 Department of Animal Biology (Verte- brates), University of Barcelona, Diagonal 645, 08028 Barcelona, Spain, 3 Department of Science of Materials and Metallurgical Engineering, Polytechnical University of Catalonia, Diagonal 647, 08028 Barcelona, Spain) SUMMARY In several species of birds, leg tendons were dissected and the stresses which could be applied by muscles in life, in isometric conditions, were calculated by means of several anatomical parameters. Ultimate tensile stresses were measured with an Instron testing machine. Using both of these stresses, the safety factors of some tendons were calcu- lated. These safety factors agree with the few values previously published on bird tendons, but are lower than the values known for mammalian tendons. Considering the relationship between the cross-sectional area of the muscle and the cross-sectional area of the tendon, bird tendons are relatively thinner than those of mammals. Finally, the possibility that the bird tendons studied work as springs and the supposed evidence of a different mechanical behaviour of some tendons, because of http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Netherlands Journal of Zoology (in 2003 continued as Animal Biology) Brill

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Publisher
Brill
Copyright
© 1993 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2960
eISSN
1568-542X
DOI
10.1163/156854294X00015
Publisher site
See Article on Publisher Site

Abstract

STRESSES IN LEG TENDONS OF BIRDS by G. VAN SNIK1, M. OLMOS2, A. CASINOS2* and J.A. PLANELL3 (1 Department of Experimental Animal Morphology and Cell Biology, Agricultural University, Marijkeweg 40, 6709 PG Wageningen, The Netherlands, 2 Department of Animal Biology (Verte- brates), University of Barcelona, Diagonal 645, 08028 Barcelona, Spain, 3 Department of Science of Materials and Metallurgical Engineering, Polytechnical University of Catalonia, Diagonal 647, 08028 Barcelona, Spain) SUMMARY In several species of birds, leg tendons were dissected and the stresses which could be applied by muscles in life, in isometric conditions, were calculated by means of several anatomical parameters. Ultimate tensile stresses were measured with an Instron testing machine. Using both of these stresses, the safety factors of some tendons were calcu- lated. These safety factors agree with the few values previously published on bird tendons, but are lower than the values known for mammalian tendons. Considering the relationship between the cross-sectional area of the muscle and the cross-sectional area of the tendon, bird tendons are relatively thinner than those of mammals. Finally, the possibility that the bird tendons studied work as springs and the supposed evidence of a different mechanical behaviour of some tendons, because of

Journal

Netherlands Journal of Zoology (in 2003 continued as Animal Biology)Brill

Published: Jan 1, 1993

Keywords: adaptation; tendons; stresses; birds; legs; safety factors; scaling

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