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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Franchi, Marco Quaranta, Marilisa Macciocca, Maria De Pasquale, Viviana Ottani, Vittoria Ruggeri, Alessandro |
| Description | Country affiliation: Italy Author Affiliation: Franchi M ( Department of Human Anatomical Sciences, University of Bologna, Italy. marco.franchi3@unibo.it) |
| Abstract | Tendons and ligaments have similar but slightly different structure and composition. Crimps of tendons and ligaments are morphological structures related to the elastic functional properties of these connective tissues. Aim of this study was to investigate the morphological arrangement of collagen fibres, fibrils and crimping pattern of suprapatellar (rectus femoris tendon-RFT and vastus intermedius tendon-VIT) and infrapatellar connective tissues (patellar ligament-PL) to relate their structural aspects to their common function role of leg extension. RFT, VIT and PL were removed from knees of Sprague-Dawley rats and light and electron microscopy (TEM and SEM) performed. Sagittal sections showed that collagen array and crimping pattern were similar in RFT and PL but differed from VIT. Morphometric analysis confirmed that crimp number was about the same in RFT and PL (5.4+/-1.4 and 6.1+/-2.8 respectively), but it was almost three times higher in VIT (14.5+/-4.7). Similarly crimp top angle in RFT and PL (141.5+/-15.0 degrees and 146.2+/-12.2 degrees respectively) was significantly higher than in VIT (122.3+/-14.8 degrees ) and the crimp base length was more than twice as wide in RFT (75.5+/-22.6microm) and PL (72.3+/-28.9microm) than in VIT (36+/-14.1microm). The smaller, fewer and most crimped crimps in VIT show that this tendon has a greater elastic recoil and responds to higher forces as among quadriceps muscles the vastus intermedius belly contributes the most during knee extension. By contrast, RFT acting as a 'stopper' tendon also plays a ligament role by limiting an excessive flexion of the joint during postural rest position of the knee. |
| File Format | HTM / HTML |
| ISSN | 09684328 |
| Issue Number | 3 |
| Volume Number | 40 |
| e-ISSN | 18784291 |
| Journal | Micron |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2009-04-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Diagnostic Imaging Fibrillar Collagens Ultrastructure Patellar Ligament Tendons Thigh Anatomy & Histology Animals Biomechanical Phenomena Elasticity Female Physiology Microscopy, Electron, Scanning Microscopy, Electron, Transmission Microscopy, Polarization Rats Rats, Sprague-dawley Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Physics and Astronomy Structural Biology Materials Science |
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