[The diagnostic value of the electroencephalogram in intracranial meningiomas (author's transl)].

The preoperative and postperative follow-up EEG findings in 129 patients with intracranial meningiomas treated in the Department of Neurosurgery, University of Graz, are reported. In 87.6% of these cases there were EEG abnormalities. The EEG showed localized abnormalities which corresponded with the side of the lesion in 90 patients. Focal convulsion potentials were recorded in 10.9% of cases. The clinical features were diagnositic of the site of the tumour in the case of temporal lobe lesions. In the postoperative follow-up, a positive correlation was found between the clinical course and the EEG findings.