What is the role of electroencephalography in the diagnosis of migraine?

Updated: Aug 15, 2019
  • Author: William C Robertson, Jr, MD; Chief Editor: Amy Kao, MD  more...
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Electroencephalography is not useful in the routine evaluation of headache patients. Reserve it for patients with an atypical migraine aura, episodic loss of consciousness, or symptoms suggestive of a seizure disorder. Focal or diffuse background slowing can be seen during a migraine headache, particularly hemiplegic or confusional migraine; however, electroencephalography results are often normal.

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