fMRI shows hypnosis produces measurable changes in brain connectivity that are distinct from both resting state and sleep — here is what the evidence actually demonstrates.

Key Takeaway

Hypnosis produces measurable, reproducible changes in brain functional connectivity that differ from both ordinary waking consciousness and other altered states. These changes are not artefacts of relaxation or suggestion — they reflect a distinct neurophysiological state that varies with hypnotic susceptibility [1, 2].

The Research Question

For decades, clinicians and researchers debated whether the hypnotic trance represents a distinct neurophysiological state or is merely a product of expectation, social compliance, and focused attention. Early neuroimaging studies produced mixed results, partly because they often combined trance induction with specific suggestions [3].

Intrinsic Hypnosis: Separating State from Suggestion

A landmark 2024 study by Vázquez and colleagues addressed this confound directly using an “intrinsic hypnosis” resting-state fMRI paradigm [1]. They found increased functional connectivity within parieto-occipital regions and decreased connectivity between frontal executive networks and the default mode network (DMN) [1].

Hypnotic Susceptibility and Brain Structure

Hoeft and colleagues (2012) demonstrated that highly hypnotisable individuals show greater resting-state connectivity between the dlPFC and DMN [2]. Jiang and colleagues (2017) confirmed the salience network moderates the hypnotic response [3].

Clinical Implications

Miltner and colleagues’ 2024 review confirmed hypnotic analgesia attenuates pain-related cortical activation [4]. Clinicians can now point to reproducible fMRI data when clients ask whether trance is “real.”

References

  1. Vázquez, P. G., Whitfield-Gabrieli, S., & Bauer, C. C. C. (2024). Brain functional connectivity of hypnosis without target suggestion. World Journal of Biological Psychiatry, 25(2), 108–120. DOI: 10.1080/15622975.2023.2265997
  2. Hoeft, F., Gabrieli, J. D., & Whitfield-Gabrieli, S. (2012). Functional brain basis of hypnotizability. Archives of General Psychiatry, 69(10), 1064–1072. DOI: 10.1001/archgenpsychiatry.2011.2190
  3. Jiang, H., White, M. P., & Greicius, M. D. (2017). Brain activity and functional connectivity associated with hypnosis. Cerebral Cortex, 27(8), 4083–4093. DOI: 10.1093/cercor/bhw220
  4. Miltner, W. H. R., Franz, M., & Naumann, E. (2024). Neuroscientific results of experimental studies on the control of acute pain with hypnosis. Frontiers in Psychology, 15, 1371636. DOI: 10.3389/fpsyg.2024.1371636