Final answer:
Multiple Sclerosis (MS) is an autoimmune disease that causes multiple effects on the nervous system separated in time and space.
Step-by-step explanation:
The neurologic disorder best described as having multiple effects on the nervous system separated in time and space is Multiple Sclerosis (MS). MS is an autoimmune disease in which the immune system mistakenly attacks the myelin sheath, a protective covering around nerve fibers in the central nervous system. This leads to the formation of multiple lesions or scars in different locations within the central nervous system.