ALPHABETICAL BRAIN VOCABULARY Flash Card #79 - Details WHAT IS THE "REPTILIAN COMPLEX" OF THE PRIMITIVE BRAIN AND WHY IS IT SO IMPORTANT? The REPTILIAN COMPLEX of the primitive ancient brain, according to the evolutionary explanation of the TRIUNE BRAIN THEORY of how our human brains developed over millions of years, developed into both the BRAINSTEM and CEREBELLUM of the modern human brain. Now your brainstem and cerebellum primarily regulate your "unconscious" instinctual and reflexive "automotic reactions" such as breathing and blood pressure. However, they both contribute to your conscious self-awareness since your "reticular activating, which is located in your BRAINSTEM makes possible your alertness and all activities! Return to #79: REPTILIAN BRAIN or BRAIN FACTS MATRIX