Definition: Visual disturbances that may precede a migraine headache. Changes in speech, sensation, or motor skills may also occur, although less frequently than visual disturbances. Typically an aura occurs minutes to hours before the onset of a headache and will disappear after about 10 to 20 minutes.
Aura
From Mark Foley, D.O., former About.com Guide
Updated November 02, 2008
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
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