Classic migraine attack complicated by confusional state: EEG and CT study.

We report electroencephalographic and clinical observations in one attack of classic migraine, accompanied by a confusional state. The ictal EEG showed slow waves over the left hemisphere, the abnormality gradually clearing up during the four days following the attack. A brain CT scan was normal during the attack and also a few days later. A possible relationship between impairment of consciousness during the attack and left hemispheric metabolic dysfunction is discussed.