Ah, the nervous system… Essentially our body’s computer, it consists of the brain, spinal cord and a massive interconnecting system of nerves ranging in size from as thick as a finger to as thin as a piece of thread. They travel beside, to and through muscles, veins and arteries, bones, ligaments, organs, tendons, fascia and skin. Their role is to carry signals to and from the brain, which then decides how to respond to these signals. A simple way of illustrating this: if you put your hand on something hot, a bunch of sensory nerves communicates this to the brain;