Everything the body does, every action, is initiated in the brain. The brain works a lot like a computer. It constantly receives information. It analyzes and processes the information. Then it responds instantly by sending out signals that cause the body to take action. When you lift your left pinky finger. the signal first went through your brain. You stand up and already the signal went through the brain. There is nothing you do that does not involve your brain. Your breathing and circulation originate in the brain. Your five senses all send information to the brain.