EEG sLORETA functional imaging during hypnotic arm levitation and voluntary arm lifting.

Department of Psychology, Lund University, Lund, Sweden.
International Journal of Clinical and Experimental Hypnosis 01/2012; 60(1):31-53. DOI: 10.1080/00207144.2011.622184
Source: PubMed

ABSTRACT This study (N = 37 with high, medium, and low hypnotizables) evaluated depth reports and EEG activity during both voluntary and hypnotically induced left-arm lifting with sLORETA functional neuroimaging. The hypnotic condition was associated with higher activity in fast EEG frequencies in anterior regions and slow EEG frequencies in central-parietal regions, all left-sided. The voluntary condition was associated with fast frequency activity in right-hemisphere central-parietal regions and slow frequency activity in left anterior regions. Hypnotizability did not have a significant effect on EEG activity, but hypnotic depth correlated with left hemisphere increased anterior slow EEG and decreased central fast EEG activity. Hypnosis had a minimal effect on depth reports among lows, a moderate one among mediums, and a large one among highs. Because only left-arm data were available, the full role of the hemispheres remains to be clarified.

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Jun 3, 2014