Invited Symposium: Neural Bases of Hypnosis
Blai, A (Department of Psychology, Penn State University, USA)
Aikins, D (Department of Psychology, Penn State University, USA)
Coyle, J (Department of Psychology, Penn State University, USA)
Bjick, E (Department of Psychology, Penn State University, USA)
The purpose of this presentation is to review on-going work examining the neural correlates of hypnosis and hypnotic suggestibility. Recent findings from our lab have revealed significant differences in EEG recordings taken from high versus low hypnotically susceptible individuals at baseline periods before, during, and after hypnotic induction. These findings appear stable in that high and low susceptible individuals can be differentiated using neural networks. Differences in EEG activity have manifested themselves in spectral power measures, in coherence measures, and in nonlinear dynamical measures typified by fractal dimensionality. Specifically, high hypnotically susceptible individuals show more EEG theta (4-8 Hz) power, a pattern of coherence suggesting more frontal to posterior connections for highs and vice versa for lows (12 Hz), greater coherence between anterior brain regions (30 Hz) and a pattern of chaos dimensionality consistent with more imagery as opposed to verbal cognitive processing in high than low hypnotically susceptible individuals. Neuropsychological assessment of high and low susceptible individuals compliments the psychophysiological approach to suggest that high susceptible individuals are more flexible in their ability to shift set and more fluid in their processing of information than low susceptible individuals.
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|Ray, W; Blai, A; Aikins, D; Coyle, J; Bjick, E; (1998). Understanding Hypnosis and Hypnotic Susceptibility from a Psychophysiological Perspective. Presented at INABIS '98 - 5th Internet World Congress on Biomedical Sciences at McMaster University, Canada, Dec 7-16th. Invited Symposium. Available at URL http://www.mcmaster.ca/inabis98/woody/ray0556/index.html|
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