| Lordotic vertebrae in sea bass (Dicentrarchus labrax L.) are adapted to increased loads. | |
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MedLine Citation:
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PMID: 15863108 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Lordosis in fish is an abnormal ventral curvature of the vertebral column, accompanied by abnormal calcification of the afflicted vertebrae. Incidences of lordosis are a major problem in aquaculture and often correlate with increased swimming activity. To understand the biomechanical causes and consequences of lordosis, we mapped the morphological changes that occur in the vertebrae of European sea bass during their development from larva to juvenile. Our micro-CT analysis of lordotic and non-lordotic vertebrae revealed significant differences in their micro-architecture. Lordotic vertebrae have a larger bone volume, flattened dorsal zygapophyses and extra lateral ridges. They also have a larger second moment of area (both lateral and dorso-ventral) than non-lordotic vertebrae. This morphology suggests lordotic vertebrae to be adapted to an increased bending moment, caused by the axial musculature during increased swimming activity. We hypothesize the increase in swimming activity to have a two-fold effect in animals that become lordotic. The first effect is buckling failure of the axial skeleton due to an increased compressive load. The second effect is extra bone deposition as an adaptive response of the vertebrae at the cellular level, caused by an increased strain and strain rate in these vertebrae. Lordosis thus comprises both a buckling failure of the vertebral column and a molecular response that adapts the lordotic vertebrae to a new loading regime. |
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Authors:
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Sander Kranenbarg; Jan H Waarsing; Mees Muller; Harrie Weinans; Johan L van Leeuwen |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of biomechanics Volume: 38 ISSN: 0021-9290 ISO Abbreviation: J Biomech Publication Date: 2005 Jun |
Date Detail:
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Created Date: 2005-05-02 Completed Date: 2005-08-23 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0157375 Medline TA: J Biomech Country: United States |
Other Details:
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Languages: eng Pagination: 1239-46 Citation Subset: IM |
Affiliation:
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Experimental Zoology Group, Wageningen University, Marijkeweg 40, 6709 PG Wageningen, The Netherlands. sander.kranenbarg@wur.nl |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Physiological Anatomy, Cross-Sectional / methods Animals Bass* Calcinosis / complications, physiopathology*, radiography* Lordosis / etiology, physiopathology*, radiography* Radiographic Image Interpretation, Computer-Assisted / methods Spine / physiopathology*, radiography* Weight-Bearing* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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