Peter Attia· MD
you can think of the human brain as having sort of very grossly three parts right this brainstem this midbrain which the amygdala you could argue is the mayor and then the cortex that you describe it's not an oversimplification I think to say that as the complexity of the organism evolved so too did that hierarchy right I mean the brainstem basically handles everything we don't have to think about ever breathing and all of those autonomic and sympathetic parasympathetic functions and then you layer on this midbrain that does everything that you said which is still kind of happening beneath consciousness and then of course there's where most of us live in our cortex where we're or where we think we live which is we're thinking these thoughts but it seems we're maybe not as aware of