The Polyvagal Theory of Ceremony: What Chanting, Drumming, Cacao, and Breath Are Actually Doing to Your Body

Every post in my nervous system reset series has been circling the same live wire without me grabbing hold of it directly.

I ended my vagus nerve post with something close to a confession.

I said I wasn’t going to pretend the biology and the spiritual work were separate conversations.

That the slow breath before prayer is doing something measurable. That a chant is vibrating a nerve. That stillness isn’t passive, it’s active signaling.

And then I moved on to my next post. Because that’s what you do with a live wire like that. You touch it, you feel the charge, and you set it back down before it becomes the whole conversation.

I’ve been picking it back up in pieces ever since. The fight-or-flight piece. The empath piece. The co-regulation piece.

Every one of them has quietly been building toward the same argument: That pretty much everything I do professionally is nervous system work wearing older, more beautiful clothes.

So. Let’s just say it outright.

The Polyvagal Theory of Ceremony

I’m coining that phrase for lack of a better one, because as far as I can tell nobody else is walking around using it, and it’s exactly what I mean.

You already know the basic map if you’ve read my vagus nerve post: A nervous system moving between three broad states:

1. Safe and social, where healing and connection actually happen.
2. Fight or flight, activated and scanning for threat.
3. Freeze, the system’s last resort when even fighting or fleeing isn’t an option.

Here’s the reframe I want to make in this post: Every one of those states can be shifted not just by what you do alone in a quiet room, but by what happens in ceremony.

And once you start looking at ritual through that lens, you notice something a little startling.

Cultures with zero contact with each other, working from completely different cosmologies, kept independently arriving at the same handful of tools.

Rhythmic drumming. Chanting and vocal toning. Paced group breath. Plant medicine. A contained, repeated structure held by someone whose job is to stay steady.

That’s not a coincidence. That’s convergent evolution on a piece of human hardware. Different traditions, same nervous system, same handful of levers.

I want to walk through what’s actually happening in the body during the parts of ceremony I use most, and then tell you why I think the container matters every bit as much as the individual tools inside it.

The Breath the Room Breathes Together

So, in my vagus nerve post, I mentioned that a longer exhale relative to your inhale is one of the most reliable ways to activate your parasympathetic nervous system (and I gave you the mechanism…slower heart rate on the exhale, more of it with a longer exhale.

What I didn’t say is what happens when that breath isn’t happening alone.

In my co-regulation post, I mentioned that breathing rates in a room tend to drift toward each other during ceremony, settling toward whoever’s steadiest.

That’s not a separate mechanism from the breathwork I already described. It’s the same lever, aimed at an entire room instead of one nervous system.

When I open a sacred cacao circle or hold space for a group breath, I’m not just teaching a technique.

I’m setting a pace that the room’s collective physiology starts to entrain to, usually without anyone noticing it’s happening.

That’s part of why paced, ceremonial breathwork (an invocation, a call and response, a shared held silence) tends to land differently than the same pattern practiced solo with an app timer.

All the nervous systems in the room are doing it together, which is its own additional signal of safety, layered right on top of the breath itself.

The Vibration in the Chant

I also mentioned humming and chanting briefly in my vagus nerve post, and I want to go further here, because the research on this is honestly better than most people expect.

Sustained vocal toning (an “Om,” a mantra, wordless humming) creates vibration that reaches the branches of the vagus nerve running through your larynx and throat.

Several controlled studies on OM chanting specifically have measured meaningful increases in heart rate variability (that gold-standard marker of vagal tone I mentioned before) after as little as five to fifteen minutes, along with measurable drops in blood pressure and a shift toward parasympathetic dominance.

Bhramari pranayama, the humming bee breath used across a lot of yogic traditions, shows similar effects.

Mind you, none of this requires you to believe anything about the vibration’s spiritual properties for it to register in your body.

It also doesn’t cancel out whatever you do believe about it. Both things can be true at once.

What’s specific to ceremony, rather than solo toning, is repetition and group vocalization.

Many voices sustaining the same tone, often for longer than any one person would sustain it alone, help create a wall of vibration that’s genuinely different in the body than a single voice humming into a pillow.

Make sense?

The Drumbeat That Takes You Somewhere

This is the one closest to my own heart, because a key the engine underneath Spirit Walking, my personal shamanic journeying practice.

Here’s what’s actually happening.

Rhythmic drumming in a specific range, roughly four to seven beats per second, measurably shifts the brain’s electrical activity toward theta wave dominance.

Theta is the frequency associated with deep meditation, vivid imagery, and trance states.

Researchers at Stanford’s Center for Computer Research in Music and Acoustics documented this decades ago, and more recent EEG studies (including work out of institutions like the Max Planck Institute) keep confirming it. A steady drumbeat in that range is a genuinely effective way to nudge a waking brain into the same electrical territory it visits in dreams.

That’s not incidental to shamanic practice. It’s the mechanism underneath it.

Across cultures with no contact with each other (the Kalahari, Siberia, the Amazon, the American plains) the drum shows up again and again as the technology for crossing from ordinary awareness into journey space.

None of those traditions had an EEG machine.

They had several thousand years of paying very close attention to what actually worked, which turns out to be a pretty good research method too.

This is also, I’d argue, the cleanest illustration of something I say often: Inward is a way to go outward.

You’re sitting still, eyes closed, apparently doing nothing. Your brainwaves say otherwise.

What’s Actually Happening When You Drink Cacao in Ceremony

I’ve already written about the social dimension of a cacao circle (that’s most of my co-regulation post). This section is about the plant itself, apart from the room you drink it in.

Ceremonial-grade cacao is rich in theobromine, a compound in the same family as caffeine but with a meaningfully different action in the body.

Where caffeine leans hard on the nervous system (hence the jitters), theobromine acts primarily as a smooth-muscle relaxant and vasodilator.

It widens blood vessels, increases blood flow, and tends to bring blood pressure down rather than up (which can be counterintuitive, I know.).

It also carries phenethylamine, a compound associated with an endorphin release and a genuine lift in mood.

That’s the biochemistry underneath the sensation people describe, almost unanimously, as cacao “opening the heart.”

It’s not just a metaphor. Your vessels are, in a very literal sense, opening.

None of that requires the plant spirit conversation to be untrue for it to also be biochemically real. I hold both. I always have.

The Container Itself Is Doing Something

Here’s the part I think gets missed even by people who are already on board with everything above.

It’s not just the individual techniques doing the work. The structure of ceremony itself, apart from any single tool inside it, is its own distinct signal to a nervous system.

A ritual with a marked beginning, a held middle, and a clear end.

Repetition, so the body learns what’s coming next. A steady person holding the space, whose entire job is to stay regulated so the room has somewhere to entrain to. That predictability and containment is, on its own, a safety cue that your nervous system’s constant unconscious scanning (what Stephen Porges calls neuroception) picks up on, independent of anything else happening in the room.

There’s a growing body of research on shared ritual specifically, apart from any of its individual components, showing measurable increases in oxytocin and physiological synchrony among participants, along with real gains in trust and cooperation within the group.

Some of that research has been done on entirely secular rituals, which tells you the effect isn’t dependent on anyone’s specific belief system. It’s more dependent on the shared, repeated, contained form.

This is a big part of why I’ve been so insistent, across my whole nervous system reset series, on the difference between a solo practice and one held in community.

It’s not just that another regulated nervous system is a resource, though it is. It’s that ceremony itself, as a form, is also doing something a well-designed app simply can’t replicate.

Don’t Get Me Wrong. I’m Not Reducing the Mystery. I’m Naming Some of Its Machinery.

I want to be super clear about this, because I think it’s the part people misread fastest. None of this is an argument that the spiritual is “just” biology, full stop, mystery solved, nothing left to see.

It’s the opposite, actually.

It’s genuinely remarkable that traditions with zero access to each other, working across thousands of years and completely different cosmologies, independently discovered the exact same small set of tools for regulating the human nervous system.

That convergence is itself a kind of evidence, and it points in a direction I find awe-inducing rather than diminishing. Something in the structure of ceremony was worth discovering and re-discovering, over and over, everywhere humans have gathered to make meaning together.

The science doesn’t explain that away.

It just gives us one more language for talking about something people have always known experientially.

Take what helps you navigate. Leave the rest, as I always say. But you don’t have to choose between the vagus nerve and the plant spirit. They’re both in the room.

Where This Is Actually Heading for Me

If you’ve made it this far, here’s what I’ll say plainly: This whole series exists because I’m building toward something bigger than a collection of blog posts.

Everything in this piece (the breath, the chant, the drumbeat, the plant medicine, the held container) is exactly what happens inside a Spirit Walking session or a cacao ceremony, and it’s the foundation of what I’m teaching inside the Materia Magicka Apprenticeship.

It’s also the backbone of a class I’ve been building all year, the one this whole series has quietly been mapping out in public.

You don’t need to take my word for any of it. You can feel it in your own body, the same way you felt your mouth water for a lemon that was never there. That’s kind of the whole point.

Your Nervous System Was Never Waiting for the Science

It’s been doing this, imperfectly, for as long as there have been humans gathered around a fire, a drum, a shared cup, a shared breath.

The science just finally caught up enough to describe what your body already knew how to do.

What would it change for you, to think of your own spiritual practice not as separate from your biology, but as one of the ways your biology is most fluent?

Disclaimer
The information shared in this post is for educational and informational purposes only and does not constitute medical advice, diagnosis, or treatment. What I share here reflects my own personal experience, research, and practice — it is not a substitute for the guidance of a qualified healthcare provider. If you have a medical condition, are managing a health concern, or are considering changes to your care, please consult your physician or licensed healthcare professional before making any decisions. Your health is your own — honor it accordingly.