Journal ArticleDOI
Composition of psoas major muscle fibers compared among humans, orangutans, and monkeys.
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TLDR
A correspondence in primates between the composition of the psoas major muscle fibers and difference in substrates inhabited as well as in their positional behaviors is suggested.Abstract:
In primate species the m. psoas major, the only muscle simultaneously controlling the spinal column and lower extremity, is expected to reflect morpho-functional adaptation to diversified locomotor behavior. By using histochemical analysis with Sudan black B staining, composition of different types of muscle fibers in the psoas major was compared between 2 Japanese macaques, 2 hamadryas baboons, 2 anubis baboons, 2 orangutans, and 17 humans. The comparison has revealed unique features of this muscle in humans: 1) Type 1 or red fibers are thicker than Type 2 or white fibers in humans but vice versa in nonhumans; 2) among the species examined the number of the muscle fibers per unit cross-sectional area is largest, implying the fibers are thinnest, in humans; 3) frequency of Type 1 fibers is highest in humans, intermediate in monkeys, and lowest in the orangutan, whereas Type 2 fibers show an inverse trend among the species. These results suggest a correspondence in primates between the composition of the psoas major muscle fibers and difference in substrates inhabited as well as in their positional behaviors.read more
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Journal ArticleDOI
Fibre type composition of the human psoas major muscle with regard to the level of its origin
Juraj Arbanas,Gordana Starčević Klasan,Marina Nikolić,Romana Jerković,Ivo Miljanovic,Daniela Malnar +5 more
TL;DR: The fibre type composition of the psoas major muscle indicated its dynamic and postural functions, which supports the fact that it is the main flexor of the hip joint and stabilizer of the lumbar spine, sacroiliac and hip joints.
Journal ArticleDOI
Distribution patterns of fibre types in the triceps surae muscle group of chimpanzees and orangutans
TL;DR: This study has shown that not only do orangutans and chimpanzees have very different muscle fibre populations that reflect their locomotor repertoires, but it also shows how the proportion of fibre types provides an additional mechanism by which the performance of a muscle can be modulated to suit the needs of a species.
Journal ArticleDOI
Age-related degeneration of the lumbar paravertebral muscles: Systematic review and three-level meta-regression
Alexander David Francis Dallaway,Alexander David Francis Dallaway,Chris Kite,Corbin Griffen,Michael J. Duncan,Jason Tallis,Derek Renshaw,John Hattersley +7 more
TL;DR: Lumbar paravertebral muscles undergo age-related degeneration in healthy adults with muscle, lumbar level and sex-specific responses and imaging modality influenced age- related muscle atrophy and fat infiltration.
Journal ArticleDOI
Fibre type composition in the lumbar perivertebral muscles of primates : implications for the evolution of orthogrady in hominoids
Johanna Neufuss,Bettina Hesse,Susannah K. S. Thorpe,Evie Vereecke,Kristiaan D'Août,Martin S. Fischer,Nadja Schilling +6 more
TL;DR: It is suggested that this homogeneous fibre composition is associated with the high functional versatility of the axial musculature that was brought about by the evolution of orthograde behaviours and reflects the broad range of mechanical demands acting on the trunk in Orthograde hominoids.
Journal ArticleDOI
Functional differentiation of the human lumbar perivertebral musculature revisited by means of muscle fibre type composition
TL;DR: No functional differentiation of the muscles was observed in the study of the muscle contractile properties and the applicability of the proposed functional classification for human back muscles was qualitatively explored by studying their fibre type composition and evaluated the representativeness of spot sampling techniques.