what I believe is that the body has energy channels. These channels allow energy (chi) to flow through out the body. When negative energy is flowing it has a tendency to get stuck or block these channels. When positive energy flows it moves fluidly and does not get stuck. I found 1 technique that can get rid of negative energy that is EFT or emotional freedom technique it works great. Also look up Dr. Roger Callahan he developed this.
RE: THE BRAIN: TRANSMITTER AND RECIEVER