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..
Quick GuideDementia, Alzheimer's Disease, and Aging Brains
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Last Editorial Review: 5/13/2016