Psychology
Comparative Study of Shamanism and Altered States
Quick fact
While many cultures use psychoactive plants like ayahuasca, the Siberian Evenki shamans traditionally induce trance through rhythmic drumming and dancing—a technique that works without any substances and still produces profound altered states.
Why this is interesting
You've probably heard of shamans, but did you know that the way they enter altered states might reveal something about how your own brain works?
Read the full explanation
Understanding Comparative Study of Shamanism and Altered States
Shamanism isn't one religion but a collection of practices found across the globe, from Siberia to the Amazon. What unites them is the shaman—a person who deliberately enters an altered state of consciousness to journey to a spirit world. This journey is typically for healing, divination, or communicating with spirits. To get there, shamans use a range of techniques: rhythmic drumming, chanting, dancing, fasting, or ingesting psychoactive plants. For example, a Siberian shaman may beat a drum for hours, while an Amazonian shaman might brew ayahuasca. Despite these differences, the core structure is remarkably similar: the shaman is believed to travel to other realms, encounter spirit helpers, and return with knowledge or power. This suggests that human brains have a general capacity for entering altered states, and culture provides the blueprint for how to do it and what to make of it.
A deeper explanation
The comparative study reveals that altered states in shamanism are achieved through two primary mechanisms: psychological and pharmacological. Psychological methods, like rhythmic drumming, work by synchronizing neural activity. Drumming at about 4-7 beats per second can entrain brainwaves into theta rhythms, associated with deep meditation, hypnosis, and REM sleep—states where the boundary between waking and dreaming blurs. Sensory deprivation, fasting, or hyperventilation can also alter brain chemistry. Pharmacological methods, like ayahuasca, contain psychoactive compounds that interact with neurotransmitter systems, leading to vivid visions and a sense of connection to a spirit world. Importantly, both methods produce similar subjective experiences, which has led anthropologists and neuroscientists to suggest that altered states are a pan-human phenomenon, universally accessible and culturally molded. The shaman's role as a healer and spiritual guide is a cultural interpretation of this neurological capacity. Understanding this comparative framework matters because it challenges the idea that spiritual experiences are solely religious or solely biological, instead showing they are woven from both threads. This can also inform modern psychology about how the brain constructs reality and why humans across cultures seek to transcend ordinary consciousness.