The Human Brain And Its Evolutionary History Essay

1264 Words May 9th, 2016 null Page
The human brain is one of many features that make our species a unique species. It is responsible for language acquisition and logic and reasoning as well as many other cognitive functions that make us unique compared to other species. This is one of the reasons scientists aim to study the brain and its evolutionary history. Scientists believe a correlation exists between these functions and the brains large size in proportion to the rest of our bodies. Fossil evidence supports this theory. Fossil evidence has shown an increase in cranial size as higher cognitive functions, such as cave paintings and stone tools, arose. Scientists still do not understand how an increase in brain size has led to such an increase in cognitive functions. They have hypothesized that as brain size increased the gaps between neurons also increased, which enabled new pathways to form in the brain. Unusual wiring patterns within the various cortices of the brain may be behind the evolution of our complex and large brain. This wiring allows to process information differently than most mammals (Zimmer 2013).
Randy Buckner and Fanna Krienen looked more in depth at comparing the human brain to the chimpanzee brain. They primarily focused on how the differences between the sensory and motor cortices and the association cortices of humans and other mammals could expand on the current theories explaining the evolution of the human brain and its complexity. They found many cortical pathways are arranged…

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