Journal ArticleDOI
Anatomy and function of expanded ribs in certain edentates and primates.
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TLDR
Anteroposteriorly expanded ribs occur in all three species of myrme-cophagids (Cyclopes didactylus, Tamandua tetradactyla, and Myrmecophaga tridACTyla) and Functionally, expanded ribs may increase the stability of the thorax, which, in turn, increases the stability in the vertebral column.Abstract:
Anteroposteriorly expanded ribs occur in all three species of myrme-cophagids (Cyclopes didactylus, Tamandua tetradactyla, and Myrmecophaga tridactyla). Similar rib expansion occurs in some armadillos (for example, Dasypus novemcinctus, Priodontes giganteas, Euphractus sexcinctus) and in some primates (Arctocebus calabarensis, Perodicticus potto, and Loris tardigradus). In C. didactylus and A. calabarensis rib expansion is so extensive that adjacent ribs imbricate. the epaxial and hypaxial musculature related to the expanded ribs in all three myrmecophagid species is described. the intercostal spaces in T. tetradactyla and M. tridactyla are approximately 50 per cent narrower than in various other mammals with unexpanded ribs; the intercostal musculature of these two species is approximately twice as thick as that in other mammals with unexpanded ribs. the proportion of intercostal musculature in C. didactylus is comparable to that in other mammals. Functionally, expanded ribs may increase the stability of the thorax, which, in turn, increases the stability of the vertebral column. This specialization in T. tetradactyla and M. tridactyla probably relates to their fossorial habitus; the trunk is stabilized during fossorial activity by xenarthrous processes in the lumbar region and by expanded ribs and robust intercostal muscles in the thorax. in strictly arboreal forms such as C. didactylus and A. calabarensis, lumbo-thoracic stability may be employed in methodical arboreal locomotion. C. didactylus, at least, is able to anchor itself with hind feet and tail and extend its trunk and forelimbs to reach an adjacent branch—a feat requiring unusual lumbothoracic stability.read more
Citations
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Comparative morphofunctional analysis of axial skeleton excluding the skull of primates based on the anatomical, radiographic, and tomographic description of the black‐striped capuchin (Sapajus libidinosus Spix, 1823)
Ana Y. F. La Salles,Jéssica Kária de Andrade,Joyce Galvão de Souza,Kelvis de B Freitas,Artur da Nóbrega Carreiro,E. L. Veloso,Ediane Freitas Rocha,Marcius A P Klem,Fábio T M Mendonça,Danilo José Ayres de Menezes +9 more
TL;DR: In this article , the vertebrae, sternum, and ribs of the capuchin monkey (Sapajus libidinosus) were described by means of anatomical dissection and radiographic and tomographic images.
Journal ArticleDOI
Morphological Aspects of the Superficial Lymph Nodes of Myrmecophaga tridactyla
Júlio Roquete Cardoso,Brunna Rocha Adorno,Viviane Souza Cruz,Simone Maria Teixeira Sabóia Morais,Gabriel Qualhato,Dayane Kelly Sabec Pereira,Kleber Fernando Pereira,Paulo César Pereira,Marcelo Seixo de Brito e Silva +8 more
TL;DR: The lymph nodes of the head, neck and forelimbs of the M. tridactyla followed the pattern observed in domestic animals and rats, while the morphological pattern of the lymph nodes in the head and the hindlimb differed from that described in domestic dogs and rats.
Journal ArticleDOI
Anatomy of the vertebral column, ribs and sternum in orange rumped agouti (Dasyprocta leporina Linnaeus, 1758): Structural and Functional perspectives
TL;DR: The axial skeleton of Dasyprocta leporina has been studied for better understanding of its locomotor behaviour as discussed by the authors, and the bones from eight adult agoutis of both sexes were observed for their anatomical features and functional significance.
Journal ArticleDOI
Is vertebral count in mammals influenced by developmental temperature? A study with Dasypus novemcinctus
TL;DR: A recommendation of: Frank Knight, Cristin Connor, Ramji Venkataramanan, Robert J. Asher Body temperatures, life history, and skeletal morphology in the nine-banded armadillo (Dasypus novemcinctus) is recommended.
References
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Journal ArticleDOI
Role of the Trunk in Stability of the Spine
TL;DR: There is a great discrepancy between the force that can theoretically be applied to the spine if the role of intracavitary pressures is ignored and theforce that can be tolerated experimentally by the isolated ligamentous human spine.
Journal ArticleDOI
Some mechanical tests on the lumbosacral spine with particular reference to the intervertebral discs; a preliminary report.
TL;DR: The investigations reported here represent an effort to explore the possibilities of obtaining quantitative data on the mechanical properties of the lumbosacral spine by applying to fresh autopsy specimens of the spine testing techniques used in civil or mechanical engineering.