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The Concept of the “Triune Brain”

In the 1960s, American neuroscientist Paul MacLean formulated the ‘Triune Brain’ model, which is based on the division of the human brain into three distinct regions. MacLean’s model suggests the human brain is organized into a hierarchy, which itself is based on an evolutionary view of brain development. The three regions are as follows: Reptilian or Primal Brain (Basal Ganglia) Paleomammalian or Emotional Brain (Limbic System) Neomammalian or Rational Brain (Neocortex) According to MacLean, the hierarchical organization of the human brain represents the gradual acquisition of the brain structures through evolution. The triune brain model suggests the basal gang…

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