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Your nerve system is an extensive network that channels nerve impulses from your brain to virtually every cell that makes up your body. This chart shows some of the integral relationships between the spine, nervous system and the body.


Sciatic Nerve: large nerve in humans & other animals; beings in lower back & runs through the buttock & down the lower limb; longest & widest single nerve in human body; supplies nearly the whole of the skin of the leg, muscles of back of thigh, and those of the leg and foot; derived from spinal nerves