Cortex functional connectivity as a neurophysiological correlate of hypnosis: An EEG case study

Neuropsychologia 45 (7):14521462 (2007)
Cortex functional connectivity associated with hypnosis was investigated in a single highly hypnotizable subject in a normal baseline condition and under neutral hypnosis during two sessions separated by a year. After the hypnotic induction, but without further suggestions as compared to the baseline condition, all studied parameters of local and remote functional connectivity were significantly changed. The significant differences between hypnosis and the baseline condition were observable (to different extent) in five studied independent frequency bands (delta, theta, alpha, beta, and gamma). The results were consistent and stable after 1 year. Based on these findings we conclude that alteration in functional connectivity of the brain may be regarded as a neuronal correlate of hypnosis (at least in very highly hypnotizable subjects) in which separate cognitive modules and subsystems may be temporarily incapable of communicating with each other normally.
Keywords consciousness  structural (operational) synchrony  EEG Frequency bands  Local/remote synchronization  Hypnotizability  Hypnosis  Suggestibility  Metastability
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