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December 1935

THE ELECTRO-ENCEPHALOGRAM IN EPILEPSY AND IN CONDITIONS OF IMPAIRED CONSCIOUSNESS

Author Affiliations

BOSTON

From the Department of Physiology and the Department of Neurology of the Harvard Medical School.

Arch NeurPsych. 1935;34(6):1133-1148. doi:10.1001/archneurpsyc.1935.02250240002001
Abstract

The electro-encephalogram is the graphic record of electrical disturbances arising in the brain. This record is analogous to the electrocardiogram, which is the record of the electrical action current associated with the contraction of the heart. The first systematic study of electro-encephalograms of human beings was carried out by Berger in the years following 1929.1 He established the cerebral origin of these electrical potentials, classified them according to frequency and amplitude and determined the conditions of their appearance and disappearance. He showed further that it was possible to record these phenomena from the intact skull of the conscious human subject. Adrian2 also investigated these cortical potentials in both man and animals, and numerous other investigators, including Foerster and Altenburger,3 have added significant contributions.

Our interest in the subject was aroused by the work of Berger and by the realization that in our electrical amplifiers and oscillographs we

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