1-698.y:

You have undergone an endoscopic examination of the central nervous system.

The central nervous system consists of the brain and the spinal column. The brain is located inside the head. It receives, processes and stores sensory impressions. The brain controls movements and various physical functions. The spinal cord is made up of nerve fibers. The brain uses the nerve fibers to exchange information with the organs, skin and muscles.

An endoscopic examination involves a thin tube or scope being passed into the body. To examine the brain, an opening is drilled or sawn into the skull. To examine the spinal cord, an opening is created by making an incision through the skin on the back. There is a camera at the top of the tube or scope that has been passed through. This camera is used to transmit images to the outside during the examination. In this way, the inside of the central nervous system can be viewed and assessed for any changes.