The Nervous System: Brain and Spinal Cord This is my introduction to the brain and spinal cord. I will tell you where they are located and what they do in my own words. Listen and The spinal cord is located on your lower back. It is made out of a big bundle of neuron and the purpose is to allow you to move. It helps you work, sleep and do things in today's world. The brain controls every thing in the body. It is in the top layer of your skull with jelly mass and has three parts. That's the end of the introduction of the spinal cord and brain. One of the parts of the nervous systems is the brain.