Neomammalian Brain

(Biology Theory)


Biology Theory
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What is Neomammalian brain?

The neomammalian brain is one of three aspects of Paul MacLean's Triune Theory of the human brain. MacLean was an American physician and neuroscientist that formulated his model in the 1960s, which was published in his own 1990 book ‘The Triune Brain in Evolution’. MacLean's three-part theory explores how the human brain has evolved from ancestors over millions of years, consisting of the reptilian, paleomammalian and neomammalian complexes. MacLean proposes that the neomammalian complex is only found in higher order mammals for example, the human brain, accounting for increased cognitive ability such as motor control, memory, improved reasoning and complex decision making. MacLean's theory explores how in higher order mammals, the Neomammalian brain works interdependently with the Reptilian and Paleomammalian complexes to allow sophisticated thought processes to occur. The theory of the Neomammalian brain is based off Paul Donald MacLeans vast research conducted through comparing the structural differences between human brains and other organisms including monkeys, and a range of reptiles. MacLean's research was built upon previous neuroscientist researchers findings, including Dr James Papez, which led to the formulation of the Triune Theory of the Human Brain and the limbic system, the two major contributions that MacLean made to the faculty of neuroscience.

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