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Research: RAY et al., De
Listed in Issue 83
Abstract
RAY et al., Department of Psychology, Penn State University, University Park, PA16802, USA, E: wjr@psu.edu, describe high resolution EEG indicators of pain responses in relation to hypnotic susceptibility and suggestion .
Background
The aim of the study was to examine the effects of hypnotic susceptibility and hypnotic suggestions upon electrocortical and self-report measures of painful stimuli .
Methodology
A dense array EEG procedure was used to measure the effects of hypnotic susceptibility and hypnotic suggestions on electrocortical activity of painful stimuli . Self-report measures of painful stimuli were also used. Six high- and six low-hypnotic susceptible individuals were examined during an initial baseline investigation and following a standard hypnotic induction under suggestions to either increase or decrease painful stimulation .
Results
The subjects showed few self-report or psychophysiological differences in response to pain stimuli . They reported differential pain experiences depending on hypnotic suggestions, and displayed differential psychophysiological indicators following a hypnotic induction with a suggestion of hypoalgesia .
Conclusion
The findings suggest that hypnotic suggestions with highly susceptible individuals modulate the later components of the evoked potential in a global manner. The importance of using both high and low hypnotically susceptible individuals preceding and following a hypnotic induction is pointed out.
References
Ray WJ, Keil A, Mikuteit A, Bongartz W, Elbert T. High resolution EEG indicators of pain responses in relation to hypnotic susceptibility and suggestion. Biological Psychology 60 (1): 17-36, 2002.
