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Definition of Aura

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..

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=2395
Last Editorial Review: 3/19/2012

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