We expect zygomatic arches with different cross sectional shapes to vary in the degree to which they resist local bending and torsion due to the contraction of the masseter muscle. A stiffer arch may lead to an increase in the relative proportion of applied muscle load being transmitted through ...
Here, we use a combination of morphometric-driven and functionally-driven approaches to study how mechanical advantage (used as a proxy for adductor muscle performance) and jaw shape relate to diet in Mesozoic mammals and small extant mammals. Mechanical advantage is the ratio of the length of th...
人体的外形与比例Shapeandproportionofhumanbody 系统标签: bodyhumanproportionshape外形muscle 人体的外形与比例(Shapeandproportionofhumanbody)I.theshapeofthehumanbody:Theshapeofhumanbodyisgenerallydividedintofourparts:head,trunk,upperlimbandlowerlimb.Eachpartcanbedividedintoseveralsmallparts:???:headoftheneuro...
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Changes in diet affect the muscles associated with mastication, including the masseter, the temporalis and the pterygoid, in turn affecting the morphology of the parietal fossa, nuchal crest and zygomatic, which we have shown to be more robust in domestic pigs than wild boar. Thus if domestic ...
Human masseterOuter shapeMultipoint measuremenIn this study multipoint measurement of masseter outline during muscle relaxation and clenching were performed based on the serial ultrasound images. Outer shape changes of the masseter with contraction were found to be unequal within the muscle.K. Kubo...
Human masseterOuter shapeMultipoint measurementObjectiveThe multipennate masseter has a complex internal architecture, which suggests the contraction is not uniform within the muscle. The heterogeneous contraction may cause inequable changes of the muscle's outer shape. This study aimed to elucidate the...
Head CT scans of 382 adults were utilized to measure masseter and temporalis muscle cross-sectional areas (CSA) as a surrogate for muscle force, and 17 mandibular anthropometric measurements. Sixty-two mandibles of young individuals (20-40 years) whose scans were without artefacts (e.g., due...