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
By Mark Foley, D.O., 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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