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The American Journal of Psychiatry, VOL. 128, No. 7

Articles | January 01, 1972

Hypnosis: Physiological, Pharmacological Reality

GEORGE A. ULETT; SEVKET AKPINAR; TURAN M. ITIL

Am J Psychiatry 1972;128:799-805.

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Chairman and Professor, Missouri Institute of Psychiatry, School of Medicine, University of Missouri-Columbia, 5400 Arsenal St., St. Louis, Mo. 63139 and Director, Missouri Division of Mental Health

Postdoctoral Fellow in Psychiatry, Missouri Institute of Psychiatry, School of Medicine, University of Missouri-Columbia, 5400 Arsenal St., St. Louis, Mo. 63139

Professor and Associate Chairman for Research, Missouri Institute of Psychiatry, School of Medicine, University of Missouri-Columbia, 5400 Arsenal St., St. Louis, Mo. 63139

1972, American Psychiatric Association

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Abstract

Normal volunteers were successfully hypnotized using a videotape induction technique. EEG measurements were made before trance induction, during induction, and during objective testing of the depth of hypnosis. Electronic analysis of EEG records revealed a significant correlation between hypnotizability and certain EEG patterns, including the presence of very fast activity. During the trance-induction and trance-testing periods, good hypnotic subjects showed a significant decrease in slow activity and an increase in alpha and beta waves. In later experiments, such psychotropic drugs as LSD-25 and dextroamphetamine were found to alter hypnotizability.

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