The jaw adductor resultant vector in primates
نویسندگان
چکیده
منابع مشابه
The Jaw Adductor Resultant and Estimated Bite Force in Primates
We reconstructed the jaw adductor resultant in 34 primate species using new data on muscle physiological cross-sectional area (PCSA) and data on skull landmarks. Based on predictions by Greaves, the resultant should (1) cross the jaw at 30% of its length, (2) lie directly posterior to the last molar, and (3) incline more anteriorly in primates that need not resist large anteriorly-directed forc...
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The exact homologies of tetrapod jaw muscles remain unresolved, and this provides a barrier for phylogenetic analysis and tracing character evolution. Here, lepidosaur jaw muscles are surveyed using direct examination of species from 23 families and published descriptions of species from 10 families. A revised nomenclature is applied according to proposed homologies with Latimeria. Among lepido...
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Previous work indicates that compared to adult thick-tailed galagos, adult long-tailed macaques have much more bone strain on the balancing-side mandibular corpus during unilateral isometric molar biting (Hylander [1979a] J. Morphol. 159:253-296). Recently we have confirmed in these same two species the presence of similar differences in bone-strain patterns during forceful mastication. Moreove...
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The masticatory apparatus amongst closely related carnivoran species raises intriguing questions about the interplay between allometry, function, and phylogeny in defining interspecific variations of cranial morphology. Here we describe the gross structure of the jaw adductor muscles of several species of canid, and then examine how the muscles are scaled across the range of body sizes, phyloge...
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The evolution of the feeding apparatus is described from Dimetrodon (a primitive mammal-like reptile representing a pretherapsid stage of evolution) through theriodont therapsids (moderately and fully advanced carnivorous mammal-like reptiles from which mammals were ultimately derived). Osteological changes are analyzed in terms of modifications in the adductor jaw musculature. In Dimetrodon, v...
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ژورنال
عنوان ژورنال: The FASEB Journal
سال: 2010
ISSN: 0892-6638,1530-6860
DOI: 10.1096/fasebj.24.1_supplement.449.3