The nervous system is a complex, sophisticated system that regulates and coordinates body activities. It is made up of two major divisions, including the following:

• Central nervous system. This consists of the brain and spinal cord.
• Peripheral nervous system. This consists of all other neural elements, including the peripheral nerves and the autonomic nerves.

Healthcare providers who treat nervous system disorders may have to spend a lot of time working with the patient before making a probable diagnosis of the specific condition. Many times, this involves performing numerous tests to eliminate other conditions, so that the probable diagnosis can be made.