Now let's discuss our spinal cord. Now, the spinal cord basically is found below the medulla and extends all the way down our body into the lower back of our body. So if we take the cross sectional view of our spinal cord we get the following diagram and notice just like the brain consists of white and gray matter our spinal cord also consists of white and gray matter. So the spinal cord consists of bone and cartilage and also of our neurons. Now, white matter basically means our neurons do have myelination while the gray matter have neurons that do not have myelination on their axons. So the big difference between the brain and a spinal cord is on the brain.