Understanding Hypnosis Through Physiological Measurements

September 10, 2025 updated by: David Reich, Icahn School of Medicine at Mount Sinai

This important study explores how hypnosis affects the human body by measuring various physiological responses during a standardized hypnotic session. Researchers at Icahn School of Medicine at Mount Sinai are conducting this research to better understand the physical markers of trance states and calmness, which could lead to new ways of measuring and treating anxiety.

The study will enroll 50 healthy adults aged 18-65 who will participate in a single hypnosis session using the validated Harvard Group Scale of Hypnotic Susceptibility. During this session, researchers will carefully monitor multiple bodily responses including brain activity (through EEG), heart rate, breathing patterns, skin conductance, and other important physiological markers. Participants will also complete anxiety questionnaires before and after the hypnosis experience.

What makes this research particularly valuable is its potential to develop new tools for mental health care. By identifying reliable physical indicators of trance states and calmness, doctors might eventually be able to:

  • Create objective measures for hypnosis effectiveness
  • Develop personalized anxiety treatments
  • Improve relaxation techniques
  • Enhance mind-body therapies

The study excludes individuals with certain medical conditions or those taking specific medications to ensure participant safety and data reliability. People with phobias related to common hypnotic suggestions (like insects, enclosed spaces, or heights) are also excluded as these might interfere with the standardized protocol.

This research represents an exciting intersection between traditional hypnotherapy and modern technology. The data collected will be used to train machine learning algorithms that could one day help clinicians:

  1. Objectively monitor patient relaxation levels during therapy
  2. Tailor hypnotic approaches to individual responses
  3. Develop new biofeedback-based treatment methods

Understanding the physiological basis of hypnosis has broader implications for mental health care. Hypnosis has shown promise in managing pain, reducing anxiety, and treating various psychological conditions, but its mechanisms remain partially understood. This study's comprehensive approach to measuring bodily responses during hypnosis could fill important gaps in our knowledge.

For patients and caregivers, this research underscores the growing recognition of mind-body techniques in mainstream medicine. As we learn more about how mental states affect physical health - and vice versa - studies like this pave the way for more integrative treatment approaches that combine the best of psychological and physiological interventions.

The potential applications of this research extend beyond clinical settings. The machine learning tools developed could eventually be adapted for personal use, helping individuals monitor their stress levels and relaxation states during meditation or other self-care practices. This represents an important step toward democratizing access to advanced biofeedback technologies.

While this is a single-session study with healthy volunteers, its findings could inform future research with clinical populations. The rigorous measurement protocols being developed may become standard tools for evaluating mind-body interventions in various therapeutic contexts. For anyone interested in the science behind hypnosis or alternative anxiety treatments, this study offers valuable insights into how modern research is validating and refining ancient healing practices.

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