Electrical Activity of the Brain

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Abstract
The value of electroencephalography and electrocorticography in the selection of patients for hemispherectomy in attempts to control seizures is not established. Cobb and Pampiglione1reported that the electroencephalogram was of no help in the selection of patients for hemispherectomy. Ajmone-Marsan and Baldwin,2however, attempted to relate their classification of EEG abnormalities in massive cerebral lesions with prognosis following hemispherectomy. Since the early report by Krynauw3on the use of hemispherectomy for intractable seizures, the use of EEG has been described with regularity, but most authors4-6have not attempted to evaluate it as an aid in prognosis. The present study is designed to reexamine this question on the basis of our experience with 11 patients with infantile hemiplegia and intractable convulsions treated by hemispherectomy or extensive decortication. Case Material The 11 patients were between 3 and 32 years of age (average age of 151/2 years) at the

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