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Document Type

Research

Abstract

Electrical potentials have been recorded from the brain of five normal human subjects by means of needle electrodes inserted about half a centimeter through the scalp, one near the external occipital protuberance and another about three inches forward and an inch to the side from the median line. The high time-constant of the amplifier, which was about a second, made it possible to obtain an almost distortionless recording of the low frequency waves. The amplifier was connected to the oscillograph element. The oscillation of the light beam projected from the element was photographed on sensitized paper.

Publication Date

1936

Journal Title

Proceedings of the Iowa Academy of Science

Volume

43

Issue

1

First Page

335

Last Page

336

Copyright

© Copyright 1936 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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