Which Part of the Brain do you respond to Life?

We constantly receive stimuli from the outside world through the senses and the brain is in charge of controlling and regulating the actions and reactions for a response. Although this is unclear, do you know from which part of your brain respond to life? Neuroscience come to explain that before could only glimpse through psychological abstractions. Here we present their conclusions.
The brain, a complex organ
The human brain is the center of the nervous system. Protected by the bones of the skull, this body is the more complex marvel that has created nature. Within the human brain alive are the ancestors of reptiles and mammals of humanity: has developed over millions of years, layer upon layer, until you reach the actual brain.
The three formations or independent but connected brains can be distinguished. He is called brain triurno that unit made up of three parts: reptilian brain, the system or limbic, and the neocortex, according to your order of evolution.