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January 1968

Schizophrenic Hallucinations and the Transcephalic DC Potential

Author Affiliations

Syracuse, NY
From the Department of Psychiatry, Veterans Administration Hospital and Upstate Medical Center, Syracuse, NY.

Arch Gen Psychiatry. 1968;18(1):114-116. doi:10.1001/archpsyc.1968.01740010116013

THE TRANSCEPHALIC direct current (TCDC) potential is the slowly changing aperiodic voltage recorded between the frontal and occipital emissary vein distributions on the midline surface of the head.1-3 It now appears that a negative frontal shift reflects a lowered activation threshold of the subjacent frontal cortex,4-6 and is related to the physiological substrate of the orienting reflex.7 At an elementary level, a brief negative shift occurs when the subject attends to an exteroceptive or nonvestibular proprioceptive stimulus, and a positive shift is promoted by interoceptive stimuli.2 Hunger and other externally oriented drive states promote a negative frontal baseline, and satiety states a positive one.1,2,8 At a more complex functional level, anxiety increases the TCDC variance of a group without imparting a specific polarity to the potential.2,8 An attempt to inhibit perception of an exteroceptive stimulus correlates

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