What is the course and significance of the aura in migraine headache?

Updated: Oct 21, 2019
  • Author: Jasvinder Chawla, MD, MBA; Chief Editor: Helmi L Lutsep, MD  more...
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Answer

The migrainous aura generally resolves within a few minutes and then is followed by a latent period before the onset of headache. However, some patients report merging of the aura with the headache.

Whether migraine with and without aura (prevalences, 36% and 55%, respectively) represent 2 distinct processes remains debatable; however, the similarities of the prodrome, headache, and resolution phases of the attacks, as well as the similarity in therapeutic response and the fact that 9% of patients experience both, suggest that they are the same entity.

When an aura is not followed by a headache, it is called a migraine equivalent or acephalic migraine. This is reported most commonly in patients older than 40 years who have a history of recurrent headache.

Scintillating scotoma has been considered to be diagnostic of migraine even in the absence of a headache; however, paresthesias, weakness, and other transient neurologic symptoms are not. In the absence of a prior history of recurrent headache and first occurrence after age 45 years, TIA should be considered and investigated fully.


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