The Chakras Explained: Ancient Tantra, Somatic Bodywork, and the Science of Embodied Awareness

by | Jul 17, 2026 | nervous system, somatic healing, Tantra, tantra education

Pleasure Is Where This Work Begins, Not Where It Ends

A man arrives having already answered eleven emails in the car. He lies down. He checks his phone one more time. He apologizes for checking his phone. Somewhere in the second hour, without deciding to, his breathing drops out of his throat and into his belly and stays there. He does not notice it happen. I notice it happen. I have watched some version of that moment more times than I could count, and it never stops being the most interesting thing in the room.

Pleasure did that. It was not insight, and it was not effort, and it was not a breakthrough or a catharsis or a story he finally told out loud. It was slow, unhurried, skilled pleasure, delivered through skin at a pace his nervous system could finally believe.

My sessions are pleasure based. I want to say that plainly at the beginning, because the word makes people flinch, and the flinch is the thing worth examining. In most of the lives I encounter, pleasure has been filed somewhere between indulgence and irrelevance. It is the reward you get after the work, if there is time, which there never is. The people who find me are not usually in crisis. They are high functioning, intelligent, competent, and running on a nervous system that has been in low grade emergency for so long that they have started calling it their personality.

The premise of my work is that this has the order backwards. Pleasure is not the reward for regulation. Pleasure is one of the mechanisms by which regulation happens. That is not a spiritual position. It is a claim about physiology, and it is the reason I have spent over two decades learning what the body does with touch.

Which brings me to the chakras, and to why I am writing this at all.

If you have encountered chakras, you have probably encountered them as a rainbow. Seven colored discs stacked up the spine, each one governing a category of your life, each one capable of being blocked, and each one apparently tuned to a specific musical frequency you can buy on a streaming platform. Some of that is very old. Most of it is about a hundred years old. A little of it was invented in the 1970s by a man doing numerology. I am going to sort out which is which, because I use this map in my practice and I would rather you know exactly what it is than believe something flattering about it.

 

What the Word Actually Meant, and What It Never Meant

The Sanskrit word cakra means wheel or disc. In the yogic and tantric literature where the term developed, these centers are described in relation to prana, the animating breath force, and to nadis, the channels through which that force was said to move.1 The imagery is of turning, of gathering, of something alive and in motion.

Here is the part that gets left out of nearly every article on this subject. The people who wrote those texts were not describing organs. They were not making an anatomical claim that later got confirmed or refuted. They were writing practice manuals. The chakras belong to a body of ritual, mantra, visualization, breath discipline, and meditative technique, and their meaning comes from what a practitioner does with them, not from what a surgeon would find.1

There was also never one chart. Different tantric and yogic lineages described different numbers of centers, placed them differently, and assigned them different meanings and functions.1Scholars of these traditions are consistent on this point. The subtle body systems of South Asia are a family of related maps, developed across centuries by different communities for different purposes, not a single technical schematic that everyone agreed on and passed down intact.3

Some traditions describe five centers. Some describe six. Some describe nine, or twelve, or twenty one. The six center model plus a crown, which produces the familiar seven, is one option among many. It became the famous one for reasons that have more to do with the nineteenth and twentieth centuries than with medieval India.5

I find this liberating rather than deflating. A map that admits it is a map is more useful than a map pretending to be territory. Once I stop needing the chakras to be organs, I can start noticing what they are actually good at, which is organizing attention. They are a vocabulary for regions of experience: the pelvis and safety, the belly and agency, the chest and grief, the throat and expression, the brow and meaning. That is a real thing a practitioner can work with.

 

The Sacred Body, and Why Tantra Refused to Treat It as an Obstacle

The tantric traditions made a move that most contemplative systems of their era did not. They declined to treat the body as the problem.2

In a great deal of religious thought, liberation means escape. The body is a weight, a distraction, a source of appetite that pulls awareness away from what matters. Tantra takes the opposite position. The body is the site where transformation happens. Breath, touch, gesture, sound, sensation, attention, and desire are not obstacles to be transcended. They are the instruments.24

That is a radical inheritance, and it is the philosophical ground my work stands on. People come to me carrying the belief that their longing is a character flaw, that their need for touch is weakness, that their pleasure is something to be earned or apologized for. They are carrying a very old idea. Tantra was arguing against that idea a thousand years ago.

I want to be careful here. I am not claiming that what I do in Marina del Rey is what an eleventh century practitioner did in Kashmir. It is not. The lineage is real and the distance is also real, and anyone who collapses that distance is selling you something. What I am claiming is narrower and I think more interesting. The insight that consciousness expresses itself through embodied life, rather than in spite of it, has held up remarkably well. Modern research has arrived at a version of it by a completely different road.

 

Where the Rainbow Came From, and Why It Matters That You Know

The seven chakras you have seen have colors. Red sits at the base, orange at the pelvis, yellow at the belly, green at the heart, blue at the throat, indigo at the brow, and violet at the crown. The arrangement is a clean spectrum, in order, like a prism.

Those colors are not ancient. They come substantially from Theosophy, a Western esoteric movement, and in particular from Charles Leadbeater, whose book The Chakras was published in 1927 by the Theosophical Publishing House.7 Leadbeater described the centers clairvoyantly, illustrated them, and gave them the spectrum arrangement that most people now assume came out of India. The historian Kurt Leland has traced this transmission in detail, following the Western chakra system from Blavatsky forward through Theosophical and later New Age writers.6

The same is true of the correspondence you have probably read as fact, the one where each chakra lines up with a nerve plexus and an endocrine gland. That mapping is a Theosophical innovation.67 It is an attempt, made in an era enthusiastic about reconciling mysticism with the new science, to give the subtle body an anatomical address. Classical Indian sources do not make that claim. They were not trying to.

Then there is the psychology. The version of the chakras where each center governs a developmental stage and a category of personal issue is largely a product of the 1980s and 1990s, popularized for Western readers by writers including Anodea Judith. I will say plainly that no peer reviewed scholarly analysis of that model exists. What exists is the observation, from scholars of Tantra, that it diverges sharply from the classical sources it claims to descend from.5

None of this makes the model useless. A twentieth century system can still be a good system. It does mean that when someone tells you the ancient sages knew your throat chakra was blue, the accurate response is that a British Theosophist thought so in 1927, and that is a different sentence.

I would rather hand you the honest version. In my experience, the people who come to me are not looking to be lied to beautifully. They have had enough of that. They are looking for someone who will tell them what is actually true and then do skilled work with their body anyway.

 

What Is Actually Happening Under My Hands

Modern anatomy has never found a chakra. No imaging technology has located a spinning center of subtle energy, and no anatomical atlas contains one. I state that directly because an article that hedges on it has already told you what it is worth.

What research has found is stranger and, to me, more beautiful.

Your skin contains a class of nerve fibers called C-tactile afferents. They are unmyelinated, which means they are slow. They are found in hairy skin, which is most of you. They do not do what the fast touch fibers do. The fast fibers tell you where you were touched and how hard, which is the information you need to catch a glass or feel a splinter. The C-tactile fibers do something else entirely. They encode how touch feels.10

In 2009, a research team measured what makes these fibers fire. The answer was specific. They respond most vigorously to stroking at roughly one to ten centimeters per second, and they respond less to anything faster or slower. The researchers then asked people to rate how pleasant that touch was, and the pleasantness curve tracked the firing curve.8 The velocity that lights up the fiber is the velocity that feels good. There is a speed at which touch becomes meaningful, and it has been measured.

It gets better. A landmark study examined where that signal goes in the brain. In a patient who lacked the large fast touch fibers entirely, gentle stroking still produced a faint but distinctly pleasant sensation. Imaging showed that the signal activated the insular cortex, and did not activate the primary somatosensory areas where ordinary touch is processed.9 The insula is the brain’s interior monitor. It is central to interoception, the sense of your own internal bodily state, which is tightly bound to emotion and self awareness.15

Read that again slowly, because it is the whole thing. Slow gentle touch does not travel the road that tells you about the world. It travels the road that tells you about yourself.

There is one more piece, and it is the one that changed how I run my practice. In a study of the affective response to touch, researchers applied identical cream to people’s forearms with identical strokes. The only variable was a word. Half were told it was a rich moisturizing cream. Half were told it was a basic cream. The label alone changed both the reported pleasantness and the activation in the orbitofrontal cortex.12 The physical stimulus was the same. The experience was not.

A broader review of this literature makes the same point across many studies. The emotional meaning of touch is shaped by expectation, context, and relationship, not by the mechanics of contact alone.11

This is why the phone call before your session is not a formality. It is not intake, it is not vetting, and it is not a script I run through. It is design work. What you understand about what is going to happen, what you have consented to, what you believe about the person whose hands these are, and what the room tells your body before anything begins, all of that is inside the touch by the time it lands. The container is not the packaging around the work. The container is part of the mechanism, and there is peer reviewed evidence that says so.

 

The Seven Centers, and What a Block Actually Looks Like on a Tuesday

Here is how I use this map, and here is what I am not doing with it. I am not diagnosing an energy lesion. I am not reading your aura. I am using a regional vocabulary, developed over centuries by people who paid extraordinary attention to embodied experience, to organize what my hands and eyes are already noticing. What follows describes each center, what the tradition associated with it, and what the corresponding pattern tends to look like in an ordinary life. Treat these as interpretive patterns, not as findings.

Muladhara, the Root Support

Muladhara translates as root support. The tradition places it at the base of the spine and associates it with earth, stability, and survival. The region in question is the pelvic floor, the low back, the sacrum, and the way load transfers through the pelvis.

Here is what this looks like on a Tuesday. You cannot settle. You are physically capable of sitting down and psychologically incapable of it. You check your bank balance when nothing has changed. You sleep badly in a way you have stopped mentioning. Your low back is tight and no one can find a reason. Underneath is a question your body keeps asking and your calendar keeps refusing to answer, which is whether you are safe, and whether anyone is holding anything up besides you.

At the table this becomes slow, clear, weight bearing contact. I support the sacrum and the legs. I offer no surprises and nothing clever. The nervous system has to be given time to conclude that nothing is going to happen to it, and that conclusion cannot be rushed, argued for, or bought.

Svadhisthana, One’s Own Abode

Svadhisthana translates as one’s own abode. The tradition locates it in the pelvic and lower abdominal region and associates it with water, flow, desire, creativity, and emotional adaptability.

Here is what this looks like on a Tuesday. The hips do not move, and neither does anything else. You have not wanted anything in a while, and you have decided that this is maturity. Sensation has gone quiet, or it arrives so loudly that you avoid it. You alternate between gripping the people you love and disappearing from them. Somewhere there is shame attached to wanting, and it has been there so long that it does not feel like shame anymore, it feels like a fact about you.

This region asks for the most careful consent work in the entire practice. I approach slowly, I ask explicitly, I titrate, and I remain entirely willing to stop. Vulnerability is not something to be broken through. It is something to be met at the speed it can tolerate.

Manipura, the City of Jewels

Manipura translates as city of jewels. The tradition places it around the navel and solar plexus and associates it with fire, digestion, transformation, will, and agency.

Here is what this looks like on a Tuesday. You are extremely good at your job. Your abdomen is braced and has been for years. Your breath happens in the top third of your chest. Your digestion has opinions. You feel dread in your gut before your mind produces a reason for it, which is not mysticism, it is your interior monitor reporting a state your thinking has not caught up to yet.15 You say yes when you mean no, and then you resent people for asking.

This is diaphragm work, breath work, and patience. Abdominal guarding softens, and the exhale lengthens on its own. Nobody has to be instructed. It simply becomes available.

Anahata, the Unstruck

Anahata translates as unstruck, a name that carries a great deal of weight in yogic thought. The tradition places it in the heart region and associates it with air, compassion, grief, devotion, and relational openness.

Here is what this looks like on a Tuesday. Your shoulders have rolled forward and your chest has quietly closed. You give constantly and receive almost nothing, and you have built an identity out of this. You are lonely in a full life. Being cared for makes you itch. If someone holds your gaze for more than a second something rises and you make a joke.

This is the center where receiving is the practice. The distinction matters. Being worked on is one thing, and being received is another. For a certain kind of high performing person, lying still and allowing themselves to be cared for with no task attached is the hardest thing in the session, and the whole point of it.

Vishuddha, the Especially Pure

Vishuddha translates as especially pure, or purification. The tradition locates it at the throat and associates it with communication, expression, and truth.

Here is what this looks like on a Tuesday. Your jaw is clenched and your dentist has mentioned it. Your neck is rigid. You talk a great deal and say nothing, or you go silent exactly when it matters. Under pressure the words evaporate. You swallow things. The throat complex ties voice, jaw, swallowing, cervical posture, and breathing into one system, which is why suppressed expression has such recognizable physical companions.

Here I work with sound as well as hands, and I will explain shortly why sound does what it does. It is not the reason most people assume.

Ajna, the Command

Ajna translates as command, or perception. The tradition locates it at the brow and associates it with insight, discernment, intuition, and pattern recognition.

Here is what this looks like on a Tuesday. You are thinking about thinking. Your mind will not put itself down. You analyze your feelings instead of having them, and you are so good at this that it passes for self awareness. Sleep is unreliable. Your eyes hurt. You have solved the same problem forty times and it has not moved once, because it was never a thinking problem.

The intervention here is not more insight. It is less. The most articulate people I work with are often the furthest from their own sensation, and the way back is not through explanation.

Sahasrara, the Thousand Petaled

Sahasrara translates as thousand petaled. The tradition places it at or above the crown and associates it with consciousness, integration, meaning, and connection.

Here is what this looks like on a Tuesday. Everything is fine and nothing means anything. You have the career, the numbers, the life you engineered on purpose, and you feel like you are watching it through glass. This is the one I hear most often from the most successful people, usually late in a session, usually in a voice they have not used in a while.

This center resists physical correlation more than any other, and I am not going to pretend otherwise. Its concerns are existential. What I can say is that meaning tends to return through the body rather than through analysis, and that it arrives sideways, in a moment of ordinary sensation, when the machinery finally stops.

 

Why Emotion Surfaces on the Table, and Why It Is Never the Goal

Touch changes attention, alters the information coming from inside the body, shifts breathing, and softens patterns of guarding that have been running for years. Any one of those can bring feeling into awareness that was previously muted. That is why bodywork can move people unexpectedly, and it is common enough that every experienced practitioner has seen it.

Now I am going to be honest about something my industry generally is not.

You have probably heard that trauma is stored in the body. It is a compelling sentence and it has helped a great many people feel less broken, which is not nothing. It is also not supported as a literal claim. A recent peer reviewed analysis examined one hundred and twenty two discrete claims from the most influential popular book on this subject and found many of the strongest ones overstated or misaligned with the evidence.27 Trauma is not filed in your psoas. Your grief is not lodged in your hip like a splinter.

What is well established is quieter and sufficient. Chronic stress produces measurable physiological wear across autonomic, endocrine, and immune function over time, a process described as allostatic load.1920 Bracing becomes habitual. Breath shortens. The body reacts before reasoning catches up, which is exactly what you would expect from a system that monitors internal state faster than it narrates it.15

There is no controlled evidence that crying on a table is necessary, or that it proves anything happened. I have seen sessions with tears that changed very little and sessions with no visible feeling at all that changed a person’s year. Emotional release is permitted in my room. It is never the objective, it is never engineered, and it is never treated as the receipt. A practitioner who needs your catharsis is meeting their own need, not yours.

 

Sound, Frequency, and the Thing That Actually Does the Work

Now for the part I suspect you have been waiting for, because it is the part the internet is loudest about.

Each chakra has a seed syllable, a bija mantra. LAM sits at the root, VAM at the pelvis, RAM at the belly, YAM at the heart, HAM at the throat, and OM at the brow. These are old, and in their traditions they function as compact sonic forms tied to deity, element, and meditative focus.12 Their significance is liturgical and contemplative.

Each chakra has also, in contemporary wellness culture, been assigned a frequency. The list runs 396 Hz, 417 Hz, 528 Hz, 639 Hz, 741 Hz, 852 Hz, and 963 Hz. These are called the Solfeggio frequencies and they are sold everywhere.

They appear to originate with a man named Joseph Puleo, working with numerology, in the 1970s.

They are not in the classical tantric sources. They are not in the Sanskrit literature. They are not, as far as any database search reveals, supported by a single controlled study demonstrating that a specific frequency produces a specific effect on a specific center. They are approximately fifty years old and their pedigree is numerological.

I could leave that there and let it read as debunking. That would be lazy, because something in this area is real, and the research on what it is happens to be elegant.

In 2001, researchers compared rosary prayer recited in Latin with yoga mantra recited in Sanskrit. The two practices share no tradition, no language, no theology, and no vocabulary. Both settled the breath to roughly six breaths per minute. Both produced improvements in heart rate variability and baroreflex sensitivity.18

The mechanism was not the syllable. The mechanism was the tempo.

This lines up with a large body of work. A systematic review of slow breathing found that respiration at around six breaths per minute consistently increases heart rate variability and is associated with reduced anxiety and improved emotional regulation.16 Breathing at an individual resonance frequency reliably maximizes this effect.17 That is not a fringe finding. That is one of the better replicated results in psychophysiology.

Chanting works. It works because sustained vocalization lengthens the exhale, engages the diaphragm, and stabilizes attention. LAM does that. A rosary does that. Humming while you do the dishes does that, provided you do it slowly enough.

The rest of the sound research is thinner and I will not inflate it. The small pilot imaging study on OM chanting involved roughly twelve people.29 The best available study on singing bowl meditation is observational with no control group and self reported outcomes.30 People felt better afterward. That is worth knowing and it is not proof of anything mechanistic.

I use sound in my work. I use the vibroacoustic sound bed. I use my voice. I do it because tempo, vibration, and attention are real inputs into a nervous system, and because it works. I do not tell you that 528 Hz is repairing your DNA, because it is not, and because I think you deserve better than that.

 

Why Any of This Changes How I Put My Hands on You

Technical knowledge is not optional in this work and it is not decorative. Anatomy, physiology, pathology, contraindications, biomechanics, and professional ethics are the floor. I am a professionally trained massage therapist with over two decades of experience, a Registered Tantra Yoga Teacher through Yoga Alliance, and I am currently completing certifications in Relational Life Therapy with Terry Real, and Emotional Release Therapy with Pat Jackman. I say that not as a credential display but as a statement about what the basline is. No symbolic map substitutes for knowing what is under your hands.

The honest research on my own field is modest and I would rather quote it accurately than flatter it. The strongest meta-analysis of massage therapy reports small to moderate benefits for anxiety, depression, and pain, alongside real methodological caveats.21 The frequently repeated claim that massage reliably lowers cortisol rests on findings that are inconsistent and underpowered.22 I am not going to sell you a hormone.

What technique alone does not explain is why some sessions land as deeply organizing while others are mechanically flawless and interpersonally thin. That gap is where the chakra map earns its place. It gives me a regional and experiential language for what I am already tracking, linking pelvis to safety, belly to agency, chest to grief, and throat to expression. I notice that someone’s rib cage will not expand, and the model reminds me that I might be looking at breathing mechanics and emotional guarding at once, and that pacing matters more than pressure.

The Somatic Tantra Immersion is my own methodology, developed over two decades and thousands of sessions, and it is built on exactly this synthesis. The sessions run long, since a nervous system in chronic emergency does not stand down in fifty minutes. The pacing stays slow and deliberate, since the velocity that reaches the affective touch pathway is a specific and unhurried one.8 The container is designed rather than incidental, since context forms part of the mechanism instead of decoration around it.12 Breath and sound are integrated throughout, since tempo does the work.18 Vibroacoustic and sensory elements support the whole. Consent and clear professional boundaries hold every part of it, since the entire proposition depends on your body concluding that it is safe, and no amount of technique overrides that conclusion.

Touch in my room is an exchange rather than a service delivered to a passive body. You are not being worked on. You are participating, and the participation is the point.

I will tell you the truth about what I know and what I do not. The C-tactile research is solid. The interoception research is solid. The breath research is solid. The frequency charts do not hold up, the energy lesion does not hold up, and trauma stored in tissue does not hold up. I would rather stand on the ground that carries weight.

 

A Personal Note Before You Go

This work is my passion. Not my occupation, not my brand, my actual passion, the thing I have organized a life around and would do regardless. Over two decades in, I still find the moment when a breath drops into a belly more compelling than almost anything else I could be doing with an afternoon.

What I hope you take from this is smaller than a belief system and more useful. Your body is not a machine that carries your mind around. Your interior is not noise to be managed until you can get back to being productive. Ancient practitioners knew that and built extraordinary maps of it. Modern research is arriving at it through nerves and breath and the insular cortex. Both are pointing at the same fact, which is that you have been treating the most sophisticated instrument you will ever own as an inconvenience.

Pleasure is not the frivolous part. Pleasure is the doorway, and it opens onto something considerably deeper than the doorway suggested.

 


 

If you have been curious about what this kind of work might open for you, I would be honored to hold that space.

I am currently welcoming new clients for Somatic Tantra Immersion™ sessions in the Marina del Rey and Los Angeles area.

If you would like to read more about what to expect in a session with me, I wrote about that here: https://sensaurasanctuary.com/what-to-expect-in-a-session-with-me-crystal-clear/

You can learn more about my background and training, explore the full Somatic Tantra Immersion offering in detail, or read about the Couples Somatic Tantra Immersion experience through the links below.

https://sensaurasanctuary.com/project/crystal/

https://sensaurasanctuary.com/somatic-tantra-immersion/

If you’re curious about session options, visit our offerings page here: https://sensaurasanctuary.com/offerings/

If you’re new and want clarity on how sessions work, our FAQ is here: https://sensaurasanctuary.com/faq/

With gratitude and grace,

Crystal Clear

Founder of Sensaura Sanctuary
Creator of Somatic Tantra Immersion
Extended, guided experiences for discerning clients

Footnotes 

1. Mallinson, J., & Singleton, M. (2017). Roots of Yoga. Penguin Classics.

2. Flood, G. (2006). The Tantric Body: The Secret Tradition of Hindu Religion. I.B. Tauris.

3. Samuel, G. (2013). Esoteric physiology and subtle body systems. In G. Samuel & J. Johnston (Eds.), Religion and the Subtle Body in Asia and the West: Between Mind and Body. Routledge.

4. White, D. G. (1996). The Alchemical Body: Siddha Traditions in Medieval India. University of Chicago Press.

5. Wallis, C. (2016). The real story on the chakras. Hareesh.org.

6. Leland, K. (2016). Rainbow Body: A History of the Western Chakra System from Blavatsky to Brennan. Ibis Press.

7. Leadbeater, C. W. (1927). The Chakras. Adyar, India: Theosophical Publishing House.

8. Löken, L. S., Wessberg, J., Morrison, I., McGlone, F., & Olausson, H. (2009). Coding of pleasant touch by unmyelinated afferents in humans. Nature Neuroscience, 12(5), 547–548. https://doi.org/10.1038/nn.2312

9. Olausson, H., Lamarre, Y., Backlund, H., Morin, C., Wallin, B. G., Starck, G., Ekholm, S., Strigo, I., Worsley, K., Vallbo, Å. B., & Bushnell, M. C. (2002). Unmyelinated tactile afferents signal touch and project to insular cortex. Nature Neuroscience, 5(9), 900–904. https://doi.org/10.1038/nn896

10. McGlone, F., Wessberg, J., & Olausson, H. (2014). Discriminative and affective touch: Sensing and feeling. Neuron, 82(4), 737–755. https://doi.org/10.1016/j.neuron.2014.05.001

11. Ellingsen, D. M., Leknes, S., Løseth, G., Wessberg, J., & Olausson, H. (2016). The neurobiology shaping affective touch: Expectation, motivation, and meaning in the multisensory context. Frontiers in Psychology, 6, 1986. https://doi.org/10.3389/fpsyg.2015.01986

12. McCabe, C., Rolls, E. T., Bilderbeck, A., & McGlone, F. (2008). Cognitive influences on the affective representation of touch and the sight of touch in the human brain. Social Cognitive and Affective Neuroscience, 3(2), 97–108. https://doi.org/10.1093/scan/nsn005

13. Garfinkel, S. N., Seth, A. K., Barrett, A. B., Suzuki, K., & Critchley, H. D. (2015). Knowing your own heart: Distinguishing interoceptive accuracy from interoceptive awareness. Biological Psychology, 104, 65–74. https://doi.org/10.1016/j.biopsycho.2014.11.004

14. Mehling, W. E., Price, C., Daubenmier, J. J., Acree, M., Bartmess, E., & Stewart, A. (2012). The Multidimensional Assessment of Interoceptive Awareness (MAIA). PLoS ONE, 7(11), e48230. https://doi.org/10.1371/journal.pone.0048230

15. Khalsa, S. S., et al. (2018). Interoception and mental health: A roadmap. Biological Psychiatry: Cognitive Neuroscience and Neuroimaging, 3(6), 501–513.

16. Zaccaro, A., et al. (2018). How breath-control can change your life: A systematic review on psycho-physiological correlates of slow breathing. Frontiers in Human Neuroscience, 12, 353. https://doi.org/10.3389/fnhum.2018.00353

17. Lehrer, P. M., & Gevirtz, R. (2014). Heart rate variability biofeedback: How and why does it work? Frontiers in Psychology, 5, 756.

18. Bernardi, L., Sleight, P., Bandinelli, G., Cencetti, S., Fattorini, L., Wdowczyc-Szulc, J., & Lagi, A. (2001). Effect of rosary prayer and yoga mantras on autonomic cardiovascular rhythms: Comparative study. BMJ, 323(7327), 1446–1449.

19. McEwen, B. S. (1998). Stress, adaptation, and disease: Allostasis and allostatic load. Annals of the New York Academy of Sciences, 840, 33–44. https://doi.org/10.1111/j.1749-6632.1998.tb09546.x

20. McEwen, B. S., & Gianaros, P. J. (2010). Central role of the brain in stress and adaptation: Links to socioeconomic status, health, and disease. Annals of the New York Academy of Sciences, 1186, 190–222.

21. Moyer, C. A., Rounds, J., & Hannum, J. W. (2004). A meta-analysis of massage therapy research. Psychological Bulletin, 130(1), 3–18.

22. Field, T. (2014). Massage therapy research review. Complementary Therapies in Clinical Practice, 20(4), 224–229.

23. Grossman, P., & Taylor, E. W. (2007). Toward understanding respiratory sinus arrhythmia: Relations to cardiac vagal tone, evolution and biobehavioral functions. Biological Psychology, 74(2), 263–285. https://doi.org/10.1016/j.biopsycho.2005.11.014

24. Grossman, P., et al. (2026). Why the polyvagal theory is untenable: An international expert evaluation of the polyvagal theory. Clinical Neuropsychiatry, 23(1), 100–112.

25. Porges, S. W. (2026). When a critique becomes untenable: A scholarly response to Grossman et al.’s evaluation of polyvagal theory. Clinical Neuropsychiatry, 23(1), 113–128. https://doi.org/10.36131/cnfioritieditore20260111

26. Porges, S. W. (2011). The Polyvagal Theory: Neurophysiological Foundations of Emotions, Attachment, Communication, and Self-Regulation. W. W. Norton.

27. Scheeringa, M. S. (2025). Evaluating evidence behind popular trauma narratives: Neurobiological and treatment claims in The Body Keeps the Score. BJPsych Bulletin. Published online 3 November 2025.

28. van der Kolk, B. A. (2014). The Body Keeps the Score. Viking.

29. Kalyani, B. G., et al. (2011). Neurohemodynamic correlates of OM chanting: A pilot fMRI study. International Journal of Yoga, 4(1), 3–6. https://doi.org/10.4103/0973-6131.78180

30. Goldsby, T. L., Goldsby, M. E., McWalters, M., & Mills, P. J. (2017). Effects of singing bowl sound meditation on mood, tension, and well-being: An observational study. Journal of Evidence-Based Complementary & Alternative Medicine, 22(3), 401–406. https://doi.org/10.1177/2156587216668109

 

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