Aura: A sensation perceived by a patient that precedes a condition affecting the brain. An aura often occurs before a migraine or seizure. It may consist of flashing lights, a gleam of light, blurred vision, an odor, the feeling of a breeze, numbness, weakness, or difficulty in speaking..

Reference: Medical Author: William C. Shiel Jr., MD, FACP, FACR , https://www.medicinenet.com/script/main/art.asp?articlekey=2395 , June 29th, 2019