Back in the 1960s Dr. Paul D. Maclean devised the Triune Brain model as a way to explain the brain’s evolution while reconciling rational human behavior with more primal and violent outbursts. The Triune Model suggests three parts to the brain: Reptilian (posterior, brain stem): the source of instincts Paleommamalian (mid-brain): the source of emotions Neomammalian (cortex): the source of…
