Electroencephalography Oscillations During Prehypnosis and Hypnosis in Subjects With High and Low Dissociative Experiences.
Basic and clinical neuroscience January 1, 2025 Hoda Taghilou, Mazaher Rezaei, Mohammad Ali Nazari et al.
People who are highly prone to dissociation show different brain activity patterns during hypnosis compared to those with low dissociative tendencies, even when both groups are equally hypnotizable. The study recorded electroencephalography (EEG) from 20 participants, all scoring 6 or higher on the Stanford hypnotic susceptibility scale, divided into 10 high-dissociative and 10 low-dissociative individuals. After hypnotic induction, both groups exhibited changes in absolute power across delta, theta, alpha, beta, and gamma bands, and differences in functional connectivity in four bands (delta, theta, alpha, and beta). These results suggest that hypnotic induction engages distinct neural networks depending on dissociative tendency, supporting the dissociation theory of hypnosis.