What is a simple brain called?

Answer 1

A simple brain is often referred to as a "primitive brain" or "reptilian brain." This term typically describes the most basic structures of the brain responsible for essential survival functions, such as the brainstem and parts of the limbic system. These areas control instincts, emotions, and basic bodily functions, reflecting the brain's evolutionary development. In contrast to more complex brains, simple brains are less involved in higher cognitive functions.