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What is the definition of aura?

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An aura is a warning sign that a migraine is about to begin; an aura usually occurs about 10 to 30 minutes before the onset of a migraine, although it can occur as early as the night before the onset. The most common auras are visual and include blurred or distorted vision; blind spots; or brightly colored, flashing or moving lights or lines. Other auras may include speech disturbances, motor weakness, or sensory changes. The duration of an aura varies, but it generally lasts less than 20 minutes.

From: Migraine and Headache Glossary WebMD Medical Reference

SOURCES: Mayo Clinic. National Institute of Neurological Disorders and Stroke.

Reviewed by Nayana Ambardekar on February 13, 2019

SOURCES: Mayo Clinic. National Institute of Neurological Disorders and Stroke.

Reviewed by Nayana Ambardekar on February 13, 2019

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