Central nervous system (CNS) stimulants speed up mental and physical processes in the body. This can be useful in the treatment of certain medical conditions. The properties of this type of drug also make it attractive to recreational drug users. These medications have many unpleasant side effects and there is a high potential for addiction. If people abuse CNS stimulants they run the risk of destroying their mental and physical health.
Central Nervous System
The central nervous system (CNS) is made up of the brain, the spinal cord, and the optic nerves. The central nervous system controls thought processes, guides movement, and registers sensations throughout the body.
The spinal cord is a single continuous structure that goes from the brain through the base of the skull and down the spinal column. Individual paired spinal nerves continue down to the tailbone. The optic nerves are at the back of the eye and carry visual information from the eye to the brain.
Coutesy : webmd