The evolution of the frontal cortex in hominids always has represented a crucial issue in anthropology, because of the association between these brain areas and relevant cognitive functions such as language or decision-making. Emiliano Bruner, paleoneurologist at the CENIEH, has now published one more article on this topic, in collaboration with Amélie Beaudet from the Department of Anatomy of the University of Pretoria, South Africa. This study, published in the French journal Comptes Redus Palevol, concerns frontal lobe form in three African fossils, representatives of archaic species of the human genus and dated between 600.000 years and 1.4 million years: OH9 and Buia (Homo ergaster/erectus) and Bodo (Homo heidelbergensis).
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The study is based on surface analysis and computed techniques. Cerebral casts were digitally reconstructed in the three specimens, and compared with modern human anatomy. Results Hong Kong Email List suggest that our frontal lobes are taller when compared with the most ancient fossil (OH9), and dorsally wider when compared with the other ones (Buia and Bodo). The study employed virtual models and biomedical imaging, and shows that the curvature of the frontal lobes may depend upon the position of the eye. In chimpanzees the eyes stand in front of the brain, and the frontal lobes are flattened, while in Homo sapiens the eye are positioned under the frontal lobes, which are curved and bulging. The three fossils display an intermediate situation. The two neuroanatomists suggest therefore that morphological evolution of the frontal lobes in the human genus may be also driven by
spatial constraints between skull and brain, and not only by specific evolutionary changes of the brain cortex.this research has identified the genetic changes associated with the carnivorous diet in plants. “According to the results, the leaves that trap insects have acquired new enzymatic functions: basic chitinase, which breaks down chitin (the main component of the exoskeleton of insects), and purple acid phosphatase, which releases phosphate groups from molecules and it helps to mobilize phosphorus from dams, ”continues Rozas, who leads the Research Group on Evolutionary Genomics and Bioinformatics at the University of Barcelona, a team that is part of the Bioinformatics Barcelona (BIB) platform . Carnivorous plants: a parallel evolution Natural selection has acted on very specific evolutionary routes so that plants can feed on animals. As detailed by