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Related Concept Videos

Altered States of Awareness01:06

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Altered states of consciousness represent significant deviations from one's normal mental state. These deviations can range from subtle changes in awareness to profound transformations in perception, thought processes, and sensory experiences. Altered states of consciousness can be triggered by various factors, including drug use, meditation, hypnosis, illness, or even intense fatigue.
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Related Experiment Video

Updated: Apr 16, 2026

Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation
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Brain Oscillations, Hypnosis, and Hypnotizability.

Mark P Jensen1, Tomonori Adachi2, Shahin Hakimian3

  • 1Department of Rehabilitation Medicine, University of Washington, Seattle, Washington.

The American Journal of Clinical Hypnosis
|March 21, 2015
PubMed
Summary
This summary is machine-generated.

Hypnosis is linked to brain oscillations, specifically theta and gamma activity, which may explain its effects on memory and emotion. This research explores the mechanistic link between brain waves and hypnotic responses.

Keywords:
Brain mechanismshypnosishypnotizabilitytheta

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Psychology

Background:

  • Brain oscillations are rhythmic electrical activity in neuronal assemblies, measured at various frequencies (delta, theta, alpha, beta, gamma).
  • Hypnosis is a state of consciousness involving focused attention and reduced peripheral awareness, with known associations to brain activity patterns.

Purpose of the Study:

  • To summarize current knowledge on the relationship between hypnosis and brain oscillations.
  • To propose a mechanistic hypothesis linking theta and gamma oscillations to hypnotic responses.
  • To explore implications for understanding hypnosis and enhancing hypnotic treatments.

Main Methods:

  • Review and synthesis of existing state-of-science literature on hypnosis and electroencephalography (EEG) or other brain oscillation measurement techniques.
  • Theoretical modeling of the proposed mechanistic link between specific brain oscillation bands and hypnotic phenomena.

Main Results:

  • Hypnosis shows the strongest associations with power changes in the theta band and alterations in gamma activity.
  • Theta and gamma oscillations are critically involved in declarative memory and emotional processing circuits.
  • The proposed mechanism suggests theta oscillations may facilitate hypnotic responses, while gamma changes may underlie them.

Conclusions:

  • The interplay between theta and gamma oscillations offers a potential mechanistic explanation for hypnosis.
  • Further research supporting these hypotheses could significantly advance our understanding of hypnosis.
  • These findings may lead to improved methods for enhancing therapeutic responses to hypnosis.