Brain Scans of Shamans Show Ability to Alter Consciousness Naturally
A new study is the first to investigate what occurs in an alternate state of consciousness by looking inside the brain of a shaman.
Shamanism is considered to be the most ancient form of healing and spiritual practice. While science has been studying the healing benefits of the psychoactive plants used by shamans to enter into an altered state of consciousness, there have been very few studies to look at the neurological nature of the state itself. A groundbreaking new study investigated the shamanic state of consciousness accessed without the use of psychedelics.
Carlos Tanner is a longtime student of traditional shamanism and the director of the Ayahuasca Foundation. an educational and ceremonial center in Peru. “Shamanism refers to an alternate dimension, a dimension where spirits reside, where communication is possible, where greater insights can be acquired and brought back to the waking-day life,” Tanner said. “So a shaman would be someone who can enter into a different dimension and then pull that back.”
The process by which shamans access this state is rooted in the rich tradition of what Tanner calls, a ‘science of consciousness enhancement.’
“Oftentimes, there is the term ‘ceremony’ to describe the intentional entrance into this shamanic state. So there would be a preparation where there might be rituals to essentially prepare, certain clothing might be worn, and the use of certain tools, oftentimes a musical instrument, might be used,” Tanner said.
“All of those are a beautiful science of consciousness enhancement that, I think, has been developed through the continual use of a psychotropic substance, although to a point where, in many cases, the psychotropic substance is no longer needed to enter that state because the consciousness enhancement that was provided by the psychotropic substance can be accomplished without it.”
Richard Harris Ph.D. is a researcher at the University of Michigan who conducted the recent study on the shamanic state of consciousness. Dr. Harris and his team were interested in investigating this state in its purest form, unaffected neurologically by the use of any exogenous substances. To facilitate the entrance into the altered state without the use of psychedelics, the practitioners all listened to a recording of shamanic drumming.
“So, we did a study with 24 shamanic practitioners and 24 normal, control individuals and we collected EEG data (electroencephalogram data), you know brain activity data, while each participant had their eyes closed while they were listening to classical music which was the control condition, and then while they were listening to shamanic drumming music which was the more experimental condition,” Dr. Harris said. “So, what we’re doing with the shamanic drumming, we’re using the person’s own physiology to engender the state.”
In addition, researchers compared the brain scans of the shamanic practitioners in this study, to scans of participants on psychedelics in other studies.
“We found key differences between entering the shamanic state of consciousness and altered states engendered by things like psilocybin, ketamine, and MDMA,” Dr. Harris said. “It’s important to know that, even though phenomenologically there are some differences in the experience, like out-of-body, spiritual, blissful states—some of those experiences are the same—but the underlying neurobiology is different.”
Specifically, the researchers found increases in gamma brainwave activity in shamanic practitioners not on psychedelics, without the typical decrease in alpha brainwave activity seen in those on psychedelics. Just what are the implications of these findings?
“That’s kind of what it’s showing is, that shamanic state of consciousness, you can get there without taking a drug. I think that’s important for the average person and that might give them more insight into how they tick,” Dr. Harris said.
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New Gene Discovery May Explain Rapid Human Brain Evolution
A revealing new study on human evolution and brain development has just been published. Could this lend credence to the stoned ape theory of brain evolution?
About 300,000-800,000 years ago the human brain experienced a massive and accelerated growth spurt. Scientists have offered many explanations for how and why this may have occurred, but a new study out of Boston Children’s Hospital focused on a fast-evolving set of the human genome called human accelerated regions (HARS). Previous studies have found about 3,100 HARS during brain development, but the team at Children’s Hospital determined one HAR gene PPP1R17 could be responsible for or play a significant role in, rapid brain development. Further, they discovered this works differently in humans than in other animals.
Ben Stewart, the host of Gaia’s Limitless series, said,”[T]hese regions of the human DNA may hold some kind of an answer at the rapid explosion of human neo-cortex because if you think of it evolutionarily, there’s not been one creature, at least on planet Earth, that has been studied that had any organ increase in size as large and as rapidly as the human brain did, so there’s definitely some unanswered questions there.”
“I’m pretty sure that these HARS regions are being looked at for something very unique in the evolution of the brain, and my own personal twist on it is this also might be important when we start looking at brian-machine interfaces and how the brain can potentially cause mutations to adapt to some kind of technology in the brain to enhance or evolve the human brain,” Stewart said.
How could this new discovery be related to the Stoned Ape theory?
“There’s a possibility that the Stoned Ape theory could lead into this. Now, the Stoned Ape theory was really popularized by Terence McKenna,” Stewart said. “Over time, you would have some of our ancient ancestors, hominids, that would be following behind bovine creatures, cows, and in the cow patties in the fields that would naturally, having followed these creatures around for hundreds of thousands of years or whatever it might have been, that they would have started eating the mushrooms, the psilocybin mushrooms that grow naturally in cow patties. These experiences tickling the language centers and other parts of the brain, bringing down the rigidity of the default mode network, and activating other communication hubs within the brain, that could actually explain the rapid explosion of the human neocortex.”
“In this article, they’re saying that these human accelerated regions act differently in humans than they do in primates or creatures like mice and ferrets that they’ve looked into now. So, potentially if there is some connection with the Stoned Ape theory, that psychedelics or psychotropics helped in the expansion of the human neocortex, and made us as, at least psychologically, so much different than the rest of the creatures on Earth, then there may be something to look at here.”
