This response come,not from easy to understand higher order brain functions that most of us are familiar with but, from our primitive brain center,known as the R-complex, or reptilian brain. With this, there are four main, or primitive response modeThis can be a difficult question to answer instead of all different personality types, each with their own experience and knowledge base.However,we can see the possibility of a general response that is inherently programmed in us all. primal defense reviews.