EEG Responses to Shamanic Drumming. Does the Suggestion of Trance State Moderate the Strength of Frequency Components?
Open accessAbstract
One of the techniques used to induce trance state in shamanic ceremonies is monotonous drumming.According to previous EEG research, certain patterns of drumming cause an increase in power of alpha and theta frequencies of the listener.Present study aimed to determine, if suggestion to experience trance state could increase the relative alpha and theta amplitude and the intensity of experienced state.A group of twenty-four subjects participated in the study.Suggestion to experience trance state decreased alpha frequency power during the drumming condition.No other significant effects of suggestion or drumming were found.
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In 24 novices, there was no difference between a suggestion group (text suggesting they may experience a trance during drumming) and a control group (text referring to percussion but no trance effect) on altered experience scores.
“Nevertheless, another study with 24 novices showed no difference between the suggestion group (text containing a suggestion that they may experience a trance during the drumming) and the control group (text referring to percussion, but no trance effect was mentioned) on the altered experience scores [83].”
From Scoping review on shamanistic trances practices (2024) · cites this paper as [83]
Cites
Meditation states and traits: EEG, ERP, and neuroimaging studies.
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THE BERGER RHYTHM: POTENTIAL CHANGES FROM THE OCCIPITAL LOBES IN MAN
ADRIAN, E. D., & MATTHEWS, B. H. C. (1934) · Brain · doi:10.1093/brain/57.4.355 · Cited by 1,396 · see citing works
Phenomenological Experience in Response to Monotonous Drumming and Hypnotizability
Maurer, R. L., Kumar, V. K., Woodside, L., & Pekala, R. J. (1997) · American Journal of Clinical Hypnosis · doi:10.1080/00029157.1997.10403417 · Cited by 46 · see citing works
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Neural Correlates of the Shamanic State of Consciousness
Huels, E. R., Kim, H., Lee, U., Bel-Bahar, T., Colmenero, A. V., Nelson, A., Blain-Moraes, S., Mashour, G. A., & Harris, R. E. (2021) · Frontiers in Human Neuroscience · doi:10.3389/fnhum.2021.610466 · Cited by 52 · see citing works
Scoping review on shamanistic trances practices
Marie, N., Lafon, Y., Bicego, A., Grégoire, C., Rousseaux, F., Bioy, A., Vanhaudenhuyse, A., & Gosseries, O. (2024) · BMC Complementary Medicine and Therapies · doi:10.1186/s12906-024-04678-w · Cited by 15 · see citing works
“While some authors have shown a change in the experience, such as heaviness, dreamlike states, and a subjective decrease in heart rate (not found with physiological measures) [4], others have found no influence of suggestions [83].”
BackgroundInfluential
- Authors
- Konopacki, M., & Madison, G.
- Affiliations
- Umeå University (SE)
- ORCID
- Madison, Guy
- Venue
- Journal of Sleep And Sleep Disorder Research
- Publisher
- Open Access Pub
- Published
- 2018
- Volume
- 1
- Issue
- 2
- Pages
- 16-25
- ISSN
- 2574-4518 (ISSN-L)
- OpenAlex
- W2503973409
- Cited by
- 9
- References
- 3
- Citations by year
- 2026: 3 · 2025: 1 · 2024: 2 · 2023: 1 · 2021: 1 · 2018: 1
- FWCI
- 0.68
- Type
- journal article
- Language
- en
- Open access
- diamond
- doi.org
- Locations
- Journal of Sleep And Sleep Disorder Research (publishedVersion, cc-by)
- KTH Publication Database DiVA (KTH Royal Institute of Technology) (submittedVersion, other-oa)
- Topics
- Social Sciences › Psychology › Social Psychology › Paranormal Experiences and Beliefs
- Life Sciences › Neuroscience › Cognitive Neuroscience › Pain Management and Placebo Effect
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
- Keywords
- trance states, hypnotic suggestion, alpha rhythm, theta oscillations, rhythmic auditory stimulation, shamans, altered states of consciousness
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