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A Neurophysiological Context for Unconscious Processes

David Galin, MD

Arch Gen Psychiatry. 1974;31(4):572-583.

Abstract
A brief review is presented of hemispheric specialization for different cognitive modes, and of the symptoms that follow disconnection of the two hemispheres by commissurotomy. Our present knowledge of the hemispheres' cognitive specialization and potential for independent functioning provides a framework for thinking about the interaction of cognitive structures, defensive maneuvers, and variations in awareness. Parallels are noted between some aspects of the mental processes of the disconnected right hemisphere and some aspects of primary process thinking and repression.

The hypothesis is proposed that in normal intact people mental events in the right hemisphere can become disconnected functionally from the left hemisphere (by inhibition of neuronal transmission across the cerebral commissures), and can continue a life of their own. This hypothesis suggests a neurophysiological mechanism for at least some instances of repression and an anatomical locus for the unconscious mental contents.

Author Affiliations
From the Langley Porter Neuropsychiatric Institute, University of California, and the Institute for the Study of Human Consciousness, San Francisco.

Footnotes
Accepted for publication June 10, 1974.

Reprint requests to the Langley Porter Neuropsychiatric Institute, University of California, San Francisco, CA 94143 (Dr. Galin).

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