Emo Phillips was a popular comedian in the late 1980's. He said "I was just thinking - My brain is the most important organ in my body - and then I realized - sure that's my brain talking" Neuroscience has led people to thinking that our brains are the whole show.
Galaxie: You are confusing the brain with the sensory systems. Our sensory organs give us orientation. The brain has NO sensory organs. In fact our brains have no feeling. Our brains depend on the various sensory receptors, sight, hearing, smell, taste, touch/pressure, temperature, proprioception (related to muscle function) nocciception (pain connected to tissue damage).
This is where modern man is still hindered by the religious concept of a soul separate from the body. The brain is only part of the organism. It's plasticity allows it to change according to the tissue demands of the whole body.
The "whole" body -brain, gut, muscle, act together. The brain and nervous system usually dominates the body in the case of a perceived emergency.
The Bible says the desirable thing in man is his "loving-kindness" and the human face of the cherubs suggests this. God is love. Humans are different from animals because of our ability to construct large groups through cooperation (love). Most of our brain power is for perceiving our proper place/function in a clan of about 100-150 and the necessary political/negotiating skills to pull this off.
Let me add that my references to "GOD" is just as a place holder for the order we perceive in the natural world. Until, humans fully understand that they need each other, GOD is a convenient adaptation to bind people together.