Artículo
Biomechanical properties of anuran long bones: correlations with locomotor modes and habitat use
Fecha de publicación:
02/2020
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Journal of Anatomy
ISSN:
0021-8782
e-ISSN:
0021-8782
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Long bones are subjected to mechanical loads during locomotion that will influence their biomechanical properties through a feedback mechanism (the bone mechanostat). This mechanism adapts the spatial distribution of the mineralized tissue to resist compression, bending and torsion. Among vertebrates, anurans represent an excellent group to study long bone properties because they vary widely in locomotor<br />modes and habitat use, which enforce different skeletal loadings. In this study, we hypothesized that (a) the cortical bone mass, density and design of anuran femur and tibiofibula would reflect the mechanical influences of the different locomotor modes and habitat use, and (b) the relationships between the architectural efficiency of cortical design (cross-sectional moments of inertia) and the intrinsic stiffness of corti-<br />cal tissue [cortical mineral density; the ´distribution/quality´ (d/q) relationship] would describe some inter-specific differences in the efficiency of the bone mechanostat to improve bone design under different mechanical loads. To test this hypothesis, we determined tomographic (peripheral quantitative computed tomography) indica-<br />tors of bone mass, mineralization, and design along the femur and tibiofibula of four anuran species with different modes of locomotion and use of habitat. We found inter-specific differences in all measures between the distal and proximal ends and mid-diaphysis of the bones. In general, terrestrial-hopper species had the highest values. Arboreal-walker species had the lowest values for all variables except for<br />cortical bone mineral density, which was lowest in aquatic-swimmer species. The d/q relationships showed similar responses of bone modeling as a function of cortical stiffness for aquatic and arboreal species, whereas terrestrial-hoppers had higher values for moments of inertia regardless of the tissue compliance to be deformed.<br />These results provide new evidence regarding the significant role of movement and habitat use in addition to the biomechanical properties of long bones within a morpho-functional and comparative context in anuran species.
Palabras clave:
ANURAN LOCOMOTION
,
BONE BIOMECHANICS
,
BONE MECHANOSTAT
,
PQCT
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IBN)
Articulos de INSTITUTO DE BIODIVERSIDAD NEOTROPICAL
Articulos de INSTITUTO DE BIODIVERSIDAD NEOTROPICAL
Articulos(IBS)
Articulos de INSTITUTO DE BIOLOGIA SUBTROPICAL
Articulos de INSTITUTO DE BIOLOGIA SUBTROPICAL
Citación
Vera, Miriam Corina; Ferretti, Jose Luis; Abdala, Virginia Sara Luz; Cointry, Gustavo Roberto; Biomechanical properties of anuran long bones: correlations with locomotor modes and habitat use; Wiley Blackwell Publishing, Inc; Journal of Anatomy; 236; 6; 2-2020; 1-14
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