One way to think about the body's functions is as a collection of integrated anatomic and physiologic systems like circulatory, respiratory, musculoskeletal, etc. The nervous system is the most complex of the body’s systems and is comprised of two parts: central (the brain and spinal cord) and peripheral (the nerves exiting the spinal cord innervating every cell of the body.)  This episode touches on both as callers ask about common and obscure neurologic diseases.