“What makes us human is that we have all three brains [new brain/cortex, mid brain and old brain], but since the new brain is the only part of brain functioning that we are conscious of we think it is the most important player. Our mid brain (emotions) and old brain (automatic functioning) processing are, for the most part, unconscious, but there’s the interesting thing: our behavior and our decision-making is just as affected, actually, even more affected by our old brain and our mid brain than it is by our new brain.
What does this mean? It means that we think we make decisions about how to act and what to do consciously, but actually most of our decision making and behavior is governed by unconscious aspects.”
Weinschenk (2009), p.7