The central nervous system comprises the brain and spinal cord. The peripheral nervous system includes all peripheral nerves.
Review Date 5/13/2021
Updated by: Brent Wisse, MD, Board Certified in Metabolism/Endocrinology, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.