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The central nervous system is built up of different components: the brain, the spinal cord and the autonomic nervous system.

The brain is our central command, the all supervising and omnipotent center. It is from here that all signals are transmitted to the respective areas of the body, and it is here that all feedback from these regions is received. The positions of each muscle and every joint are immediately registered and calculated to the degree precicely and, if necessary, counteracted to ensure the most upright posture and specific coordination. The release of each hormone is precise down to the microgram and is increased or decreased depending on the amount of stress. All sensory inputs are transmitted at lightning speed and processed both logically and emotionally. Memories and feelings arise, and the vegetative nervous system reacts with increased heartbeat, altered digestion, adjustment of breathing and much more. At the “temporal lobe” of the brain, there is a large furrow that divides the anterior and posterior parts of the lobe. The anterior part (precentral gyrus) is divided in its cell portions according to body region and is used for motor control. Motor signals are sent from here and terminate directly at the muscle, which executes the corresponding commands. Behind the furrow is the postcentral gyrus, which is also divided by body region and is responsible for sensitivity, as well as serving as the target of signals sent from the periphery to the center of the brain.