EEG source localization and global dimensional complexity in high- and low- hypnotizable subjects: a pilot study.

Abstract:

:Individuals differ in hypnotizability. Information on hypnotizability-related EEG characteristics is controversial and incomplete, particularly on intracerebral source localization and EEG dimensionality. 19-channel, eyes-closed resting EEGs from right-handed, healthy, 8 high- and 4 low-hynotizable subjects (age: 26.7 +/- 7.3 years) were analyzed. Hypnotizability was rated after the subjects' ability to attain a deep hypnotic stage (amnesia). FFT Dipole Approximation analysis in seven EEG frequency bands showed significant differences (p < 0.04) of source gravity center locations for theta (6.5-8 Hz, more posterior and more left for highs), beta-1 and beta-2 frequencies (12.5-18 and 18.5-21 Hz; both more posterior and more right for highs). Low Resolution Electromagnetic Tomography (LORETA) specified the cortical anteriorization of beta-1 and beta-2 in low hypnotizables. Power spectral analysis of Global Field Power time series (curves) showed no overall power differences in any band. Full-band Global Dimensional Complexity was higher in high-hypnotizable subjects (p < 0.02). Thus, before hypnosis, high and low hypnotizables were in different brain electric states, with more posterior brain activity gravity centers (excitatory right, routine or relaxation left) and higher dimensional complexity (higher arousal) in high than low hypnotizables.

journal_name

Neuropsychobiology

journal_title

Neuropsychobiology

authors

Isotani T,Lehmann D,Pascual-Marqui RD,Kochi K,Wackermann J,Saito N,Yagyu T,Kinoshita T,Sasada K

doi

10.1159/000054942

keywords:

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

192-8

issue

4

eissn

0302-282X

issn

1423-0224

pii

54942

journal_volume

44

pub_type

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