What is the role of EEG in the workup of migraine variants (equivalents)?

Updated: Oct 16, 2019
  • Author: Rima M Dafer, MD, MPH, FAHA; Chief Editor: Helmi L Lutsep, MD  more...
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Electroencephalography (EEG) is unnecessary in the management of migraine variants, except when seizure disorders must be excluded (as in migraine-triggered seizure) and when patients have recurrent episodes of confusion. EEG generally does not offer additional information in migraineurs. In general, nonspecific interictal EEG abnormalities, including epileptiform activity, are reported in higher frequencies in migraineurs during or immediately after an episode, with slowing in focal or generalized patterns and occipital spike-wave complexes.

Continuous ambulatory or video EEG may be useful in patients with episodic confusion or recurrent focal neurologic deficits to exclude partial seizures or nonconvulsive status epilepticus.

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