The brain and the body can be pictured as a network of power lines. The brain would be the power plant from which the electricity is produced and the nervous systems would make up the power lines. When something "activates" a nerve, an electrical current runs through the nervous system up to the brain, which analyzes the reaction, then another signal is sent back down to the location of the reaction with a response on what the cells in that area should do. These responses cause humans to act in different ways, for if the touch is causing pain, a defensive reaction will ensue, if the touch is pleasing, then a positive reaction will come out of it. The thought process that comes from analyzing these reactions is proportional and is driven by the small electrical impulses sent through the nerves to the brain and back.
(Charline)
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