[Landau-Kleffner syndrome: relationship between aphasia and electroencepharographic changes]

The relationship between aphasia and electroencephalogram (EEG) findings was studied in 2 patients with Landau-Kleffner syndrome. The appearance of diffuse spike and wave complexes almost always preceded the exacerbation of aphasia. Prior to the improvement of aphasia, EEG abnormality localized into the temporal region, and subsequently disappeared.