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The triune brain theory, also known as the triune brain model or the three-brain theory, proposes that the human brain can be divided into three distinct but interconnected parts: the reptilian brain, the limbic brain, and the neocortex. The reptilian brain, also known as the R-complex, is responsible for basic survival instincts, such as hunger, thirst, and aggression. The limbic brain, also known as the 1/-