Abstract
Brain electrical potentials evoked by visual stimulation were analyzed to study the neurophysiological mechanism associated with hypnotic hallucination. The visual evoked responses of 6 highand 6 low-hypnotizable subjects were compared in three hypnotic conditions: stimulus enhancement. stimulus diminution, and stimulus elimination (obstructive hallucination). High-hypnotizable individuals demonstrated significant suppression of the later components of the evoked response (N2 and Pl ) while experiencing obstructive hallucinations, indicating a change in information processing. This effect was significantly greater in the right. as compared to the left, occipital region.
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