This explains why the right lobe is usually inactive, and why it becomes active when one injests psychedelic drugs.
To better understand this theory, here's an in depth explaination of each circuit:
I. THE BIO-SURVIVAL CIRCUIT
This invertebrate brain was the first to evolve (2 to 3 billion years ago) and is the first activated when a human infant is born. It programs perception onto an either-or grid divided into nurturing-helpful Things (which it approaches) and noxious-dangerous Things (which it flees, or attacks). The imprinting of this circuit sets up the basic attitude of trust or suspicion which will ever after trigger approach or avoidance.
II. THE EMOTIONAL CIRCUIT
This second, more advanced bio-computer formed when vertebrates appeared and began to compete for territory (perhaps 500,000,000 B.C.). In the individual, this bigger tunnel-reality is activated when the DNA master-tape triggers the metamorphosis from crawling to walking. As every parent knows, the toddler is no longer a passive (bio-survival) i...