Aura refers to focal neurological symptoms which precede a migraine headache in a person who experiences migraine with aura. In this group of individuals aura is a warning sign of the migraine onset; however, other individuals do not experience aura before their migraine. The aura (neurological) symptoms of a migraine usually involve the eyes, causing visual disturbances which may be positive (seeing shimmering light at the edge of one’s vision) or negative (seeing a dark tunnel in the centre of one’s vision) or a combination of the two. They may also involve neurological disturbances to other areas of the body for example sensory disturbances (numbness or pins and needles in the arms and legs) or cognitive (speech disturbances). Aura typically resolves < 1 hour before the onset of headache symptoms.
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