Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/72576
Type: Artigo de periódico
Title: THE UNIQUE FIBRILLAR ARRANGEMENT OF THE BULLFROG PRESSURE-BEARING TENDON AS AN INDICATIVE OF GREAT FUNCTIONAL DEFORMABILITY
Author: DECARVALHO, HF
VIDAL, BD
Abstract: The fiber distribution and ultrastructure in the plantaris longus pressure-bearing tendon of the bullfrog were investigated. The tension region of the tendon showed a predominant parallel distribution of collagen fibers, but three main zones with different crimp parameters were identified with the use of the polarizing microscope. The compression region showed collagen fibers with aspects of disaggregation and were composed of disperse and undulating fibrils, These collagen fibers establish a three-dimensional network but showed a preferential distribution in planes disposed perpendicularly to the tendon's main axis. It is assumed that the convoluted and disaggregated collagen fibers must be distended before exerting any reinforcement on the tissue and that this only occurs after a great deformation of the tendon. Groups of 5-6 fibrils not associated in fibers are also dispersed in the compression region. The tissue is assumed to have a highly viscous fluid nature allowing for the deformation needed for collagen fibrils to reinforce the tendon structure. The convoluted and crimped structure of collagen fibers would be especially useful when the tendon is submitted to the sudden and strong mechanical loading expected to occur during jumping and to provide the tendon with the capacity of great functional deformability necessary for the high amplitude of feet movements attained on jumping and swimming.
Subject: COMPRESSIVE FORCES
CRIMP MORPHOLOGY
EXTRACELLULAR MATRIX STRUCTURE
FIBER REINFORCEMENT
PRESSURE-BEARING TENDON
Country: França
Editor: Editions Scientifiques Elsevier
Rights: fechado
Identifier DOI: 10.1016/0248-4900(94)90067-1
Date Issue: 1994
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

Files in This Item:
File Description SizeFormat 
WOSA1994QX31200008.pdf24.65 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.