Emiliano Bruner, paleoneurologist at the National Center for Research on Human Evolution (CENIEH), leads a new study that has just been published in the Annals of Anatomy , on the anatomy of the parietal lobes in modern humans, in particular on the element innermost of these brain districts, the precuneus, key to brain anatomical diversity. For this study, Emiliano Bruner and his team have evaluated the brain shape of more than 250 subjects of different races, confirming that, also when a wide genetic diversity is considered, the size of the precuneus is the most variable character among adult individuals. Furthermore, “a larger size in these parietal areas is sometimes also associated with greater complexity of the brain sulci”, he adds. The data suggest that the marked variability of the precuneus is located in its most dorsal and anterior areas, which include the internal

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and external surfaces of the superior Japan Email List parietal lobes and that, at a functional level, they are crucial to integrate information about the body (somatic information). and about the outside environment (visual information). These functions are also decisive for the capacity for imagination and simulation, especially in egocentric processes, that is, they are based on the spatial and temporal relationships between the individual and the environment. “They are functions that, in addition to coordinating the body in space and time, are also involved in the perception of oneself in the social context,” says Emiliano Bruner. This publication, which has been produced in collaboration with Emory University (Atlanta, USA), is the fifth in a series of articles covering the geometry of the precuneus, its cortical surface and thickness, its turns, grooves and extension. lateral, as well as the differences between humans

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chimpanzees.The shape of these scales is closely related to the function they perform. For example, it is possible to different scales involved in protection against friction, prevention of the anchorage of parasites on the skin or reduction of friction with the water. The authors also show that this information is a very useful tool to learn about the way of life of extinct animals, specifically in the oldest vertebrate groups, and will be of interest to paleontologists and zoologists. The conclusions of the research could be applied in bioengineering, by knowing better the skin of these animals and thus being able to develop tools in nautical engineering. An example, according to Héctor Botella, would be some swimsuits (prohibited today by the Olympic committee) that imitate the skin of certain sharks and can significantly increase the swimmer’s speed.

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