The triune brain model suggests the basal ganglia was acquired first, which is thought to be in charge of our primal instincts, followed by the limbic system, which is in charge of our emotions or affective system, then the neocortex, which is thought to be responsible for rational or objective thought.

Is the triune brain model accurate?

While inaccurate in many respects as an explanation for brain activity, structure and evolution, it remains one of very few approximations of the truth we have to work with: the "neocortex" represents that cluster of brain structures involved in advanced cognition, including planning, modeling and simulation; the " ...

What are the triune brain structures?

The triune brain model divides the brain into three parts: the reptilian complex, which includes the basal ganglia and brain stem, among other structures; the limbic system, which includes the amygdala, hippocampus, and cingulate gyrus, among other structures; and the neocortex.