WebThis kind of mechanism, called pleurokinesis, involved a slight outward rotation of portions of the upper jaw, especially the maxilla (the bone that contains the upper … WebLike these it did have pleurokinesis, a cranial joint system that produced the food-grinding action, but only partially in that the quadrate at the back of the skull was still relatively immobile. Protohadros ' rear legs were probably longer than the front pair, and it could move on all fours or walk and run on its hind legs only.
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WebJul 4, 2024 · What is pleurokinesis? How did it function in the jaws of hadrosaurids? 8. Name another vertebrate with a kinetic skull. 9. Why is it that most paleontologists now think that hadrosaurid head structures were related to intraspecific competition and/or sexual selection? 10. Give a non-dinosaur example of a K-strategist, and an r-strategist. 11. WebJul 7, 2009 · Norman and Weishampel (6, 9–11) conducted kinematic and detailed functional anatomical analyses of all available hypotheses of hadrosaurid jaw mechanics and postulated a novel jaw mechanism, termed pleurokinesis. In this model, isognathic vertical adduction of the lower jaws generated a transverse power stroke. crystallized earth wow
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Pleurokinesis refers to the complex multiple jointing thought to occur in ornithopods, such as hadrosaurs. Ornithopod jaws are isognathic (meet simultaneously), working like a guillotine to slice plant material which can be manipulated with their teeth. See more Cranial kinesis is the term for significant movement of skull bones relative to each other in addition to movement at the joint between the upper and lower jaw. It is usually taken to mean relative movement between the upper … See more The first example of cranial kinesis was in the chondrichthyans, such as sharks. There is no attachment between the hyomandibular and … See more Different groups of reptiles exhibit varying degrees of cranial kinesis, ranging from akinetic, meaning there is very little movement between skull bones, to highly kinetic. See more Birds show a vast range of cranial kinetic hinges in their skulls. Zusi recognised three basic forms of cranial kinesis in birds, See more Versluys (1910, 1912, 1936) classified types of cranial kinesis based on the location of the joint in the dorsal part of the skull. • Metakinesis … See more Early tetrapods inherited much of their suction feeding ability from their crossopterygian ancestors. The skulls of modern Lissamphibians are greatly simplified, with many bones fused or otherwise reduced. They have mobility in the See more The three principle types of kinesis found in Dinosaurs are, • Streptostyly; forwards and back movement of the quadrate, seen in most lizards, snakes and birds. In dinosaurs, this is seen in Ankylosaurs, and possibly in many theropods, … See more WebPleurokinesis is the ability to move your ribs at will. This ability would change the way humans chew food, as they would be able to move their ribs to grind food down. This would have a significant effect on food choices, as humans would be able to choose to eat foods that are easier to chew. WebJul 26, 2016 · Supplemental Information 4: Strain and strain energy density results from simulated molar bites.Maximum principal strain (MaxPrin), minimum principal strain (MinPrin), strain mode (Mode), maximum shear strain (Shear), von Mises strain, and strain energy density (SED) generated during simulated molar (M 2) biting in the ALL-HUM … crystallized earth farming wow