HoldsUp

Chris Williamson · 2026-07-25 · Chris Williamson (host), Stephen Porges

Polyvagal Theory: Why You Feel So Anxious All The Time - Dr Stephen Porges

30 research-tied claims examined: 3 contradicted 2 overstated 3 context 18 supported 4 unverified

3

Contradicted by research

0:16:18Stephen Porgescontradictedhigh

Mammals possess a dual vagal system consisting of an evolutionarily older dorsal vagal system regulating internal organs and a newer ventral vagal system linked to facial and vocal muscles.

"The mammal basically had not only a fight-flight system and not only an older dorsal, the back of the brain vagal system that regulated your organs, but also had this newer ventral vagal that was locked to our voice and the muscles of our face and head." (said at 0:16:18)

The speaker's claim restates a core premise of Stephen Porges's Polyvagal Theory, which posits that mammals uniquely evolved a dual vagal system—a newer ventral vagal system connected to facial/vocal muscles and social engagement, alongside an older dorsal vagal system regulating internal organs. However, systematic evaluations of comparative neuroanatomy and autonomic neurophysiology demonstrate that this proposed evolutionary sequence and anatomical segregation are unsupported and contradicted by the broader scientific evidence.

0:52:53Stephen Porgescontradictedhigh

Stephen Porges was the first person to quantify heart rate variability in 1969.

"actually what you don't know is that in the '60s I was the first person to quantify heart rate variability." (said at 0:52:53)

The claim that Stephen Porges was the first person to quantify heart rate variability (HRV) in 1969 is contradicted by historical records of physiological research. Respiratory sinus arrhythmia (RSA) and changes in heart rate variability were first recorded as early as 1847 by Carl Ludwig, and quantitative measurements of beat-to-beat cardiac variations were conducted long before 1969 (Billman, 2011). While Porges developed specific signal-processing methods for quantifying vagal tone and HRV in psychophysiology later in his career, he was not the first person to quantify heart rate variability.

1:45:27Stephen Porgescontradictedhigh

Although the nucleus from which the ventral vagus originates predates mammals, it did not possess cardioinhibitory fibers until mammals evolved.

"the fact that it the nucleus that where the vagus comes from in the ventral vagus is an older nucleus long before mammals is fine, but that didn't have cardioinhibitory fibers until mammals had it." (said at 1:45:27)

The claim that the brainstem nucleus associated with the ventral vagus (the nucleus ambiguus or ventral motor column) lacked cardioinhibitory fibers prior to mammalian evolution is a core premise of the polyvagal theory that is contradicted by comparative neuroanatomy and physiology. Studies in non-mammalian vertebrates—including cartilaginous fish (elasmobranchs), teleosts, amphibians, and reptiles—demonstrate that cardiac vagal preganglionic neurons mediating cardioinhibition originate from both dorsal and ventrolateral/ambiguus motor nuclei and provide functional vagal regulation of heart rate. Expert consensus evaluations of the evolutionary and neuroanatomical claims of the polyvagal theory show that ventral vagal cardioinhibitory projections and cardiorespiratory interactions predate mammals by hundreds of millions of years.

  • contradicts: Fundamental challenges and likely refutations of the five basic premises of the polyvagal … (Biological psychology 2023) · cited 86x in the literature
    "Polyvagal conjectures rest on a primary assumption that brainstem ventral and dorsal vagal regions in mammals each have their own unique mediating effects upon control of heart rate. The polyvagal hypotheses link these putative dorsal- vs. ventral-vagal differences to socioemotional behavior... as well as to trends in the evolution of the vagus nerve... I will here briefly document how each of these basic premises have been shown to be either untenable or highly implausible based on the available scientific literature." (abstract, passage verified)
    pubmedfull study (doi)
  • contradicts: Why The Polyvagal Theory Is Untenable: An international expert evaluation of the polyvagal… (Clinical neuropsychiatry 2026) · cited 5x in the literature
    "This article specifically appraises--based upon the current state of knowledge of autonomic function and vertebrate evolution--several major elements of the PVT, as described in Porges (2025a) and elsewhere. These include: 1) the validity of PVT assumptions that respiratory sinus arrhythmia is a direct measure of the extent of central vagal drive to the heart; 2) PVT characterizations regarding the neuroanatomy and functions of two major brainstem vagal nuclei, the ventrally situated Nucleus Ambiguus and the Dorsal Motor Nucleus of the vagus nerve; 3) PVT assertions regarding the evolution of the vagus nerve... All co-authors agree that major tenets of the PVT are not supported by past or current knowledge and, in several instances, are inconsistent with the broader evidence base. Since the topics addressed constitute fundamental premises of the PVT, we conclude that the PVT is untenable, because it is not defensible based on existing neurophysiological and evolutionary evidence." (abstract, passage verified)
    pubmedfull study (doi)
2

Overstated

0:00:00Chris Williamson (host)overstatedmoderate

Stephen Porges has authored more than 400 peer-reviewed scientific papers.

"You've authored more than 400 peer-reviewed scientific papers and literally created polyvagal theory." (said at 0:00:00)

The host claims that Stephen Porges has authored "more than 400 peer-reviewed scientific papers" and created the polyvagal theory. Published records confirm that Stephen Porges developed Polyvagal Theory (PVT), as outlined in his published review articles (e.g., PMID 38108034, PMID 41035859). However, PubMed indexes approximately 250 to 300 publications under Porges SW / Porges S (including non-indexed papers or book chapters, totals in biographical notes typically range around 300 publications rather than >400 peer-reviewed papers). Therefore, while his creation of the polyvagal theory and extensive publication record are real, claiming >400 peer-reviewed papers is overstated relative to indexed database records.

0:38:40Chris Williamson (host)overstatedlow

Four clinical trials of AG1 NextGen showed it fills common nutrient gaps, improves key nutrient levels in 3 months, and increases healthy gut bacteria tenfold.

"And now they've taken it a step further with AG1 NextGen, backed by four clinical trials. And in those trials, it was shown to fill common nutrient gaps, improve key nutrient levels in just 3 months, and increase healthy gut bacteria by 10 times, even in people who already eat well." (said at 0:38:40)

Published randomized clinical trials on AG1 (Athletic Greens) demonstrate that the supplement can acutely increase circulating micronutrient levels and improve dietary micronutrient adequacy by filling Estimated Average Requirement (EAR) gaps over 2 weeks, as well as selectively enrich specific probiotic taxa contained in the formulation (such as Lactobacillus and Bifidobacterium species). However, the claim overstates the evidence: the published trials were small (16 to 30 participants) and brief (acute 8-hour pharmacokinetics, 14-day, and 4-week interventions, rather than 3 months), and they found no significant changes in overall gut microbiome alpha or beta diversity, rather than a broad tenfold increase in healthy gut bacteria.

3

Needs context

0:23:39Stephen Porgesneeds contextlow

The mammalian vagus nerve is neuroanatomically linked to the cranial nerves controlling facial expression and vocal intonation.

"the nerves that control the face, the smile, nerves that control the intonation of our voice were linked to how that mammalian vagus was working." (said at 0:23:39)

The speaker is describing a core tenet of Stephen Porges's 'Polyvagal Theory', which posits an integrated mammalian 'social engagement system' linking the myelinated ventral vagal motor pathways (nucleus ambiguus) with cranial nerves controlling facial expression (cranial nerve VII) and vocalization (cranial nerves IX and X). While brainstem motor nuclei for these cranial nerves do anatomically co-exist in the medulla and pons and share central autonomic network connections, the specific polyvagal hypothesis of a uniquely mammalian, phylogenetically distinct 'face-heart' functional circuit is heavily contested in comparative neuroanatomy and autonomic physiology.

1:17:30Stephen Porgesneeds contexthigh

Dr. C. Sue Carter discovered the link between oxytocin and social behavior.

"She, by the way, she's the person who discovered the link between oxytocin and social behavior, Sue Carter, that's my wife." (said at 1:17:30)

Dr. C. Sue Carter pioneered the research establishing the specific link between oxytocin and adult social bonding (pair bonding) in monogamous mammals through landmark studies in prairie voles (*Microtus ochrogaster*). Her lab demonstrated that central infusions of oxytocin facilitate the development of partner preferences in female prairie voles even in the absence of mating. However, claiming she discovered the link between oxytocin and social behavior broadly requires qualification: while Dr. Carter discovered oxytocin's essential role in adult pair bonding, oxytocin had already been implicated in other mammalian social and reproductive interactions, such as maternal bonding, prior to her pair-bonding studies.

1:42:22Chris Williamson (host)needs contextvery low

Research in mice shows that deeply traumatized baby mice require three generations to return to a normal nervous system state.

"Some I've seen some research that says deeply traumatized baby mice require three generations to get back to a normal nervous system state." (said at 1:42:22)

Research using mouse models of early life trauma (such as unpredictable maternal separation combined with maternal stress) demonstrates that behavioral, metabolic, and neuroepigenetic alterations can be transmitted across generations via germline epigenetic mechanisms. In seminal studies led by Mansuy and colleagues, stress-induced behavioral and molecular changes persisted up to the 3rd, 4th, and even 5th generations, with traits gradually attenuating in subsequent unexposed generations. However, framing this as a fixed rule where baby mice 'require three generations to get back to a normal nervous system state' oversimplifies the findings: the number of affected generations varies depending on lineage (paternal vs. maternal transmission), specific phenotypic traits measured, and environmental factors (such as environmental enrichment, which can reverse transgenerational effects earlier). Because all direct evidence comes from rodent models, the GRADE certainty is very low.

  • supports: Epigenetic transmission of the impact of early stress across generations. (Biological psychiatry 2010) · cited 1127x in the literature
    "Most of the behavioral alterations are further expressed by the offspring of males subjected to maternal separation, despite the fact that these males are reared normally. Chronic and unpredictable maternal separation also alters the profile of DNA methylation in the promoter of several candidate genes in the germline of the separated males. Comparable changes in DNA methylation are also present in the brain of the offspring and are associated with altered gene expression." (abstract, results, passage verified)
    pubmedfull study (doi)
  • context: Paternal transmission of behavioural and metabolic traits induced by postnatal stress to t… (Environmental epigenetics 2022) · cited 27x in the literature
    "Our previous work on a mouse model of early postnatal stress showed that behaviour and metabolism are altered in the offspring of exposed males up to the 4th generation in the patriline and up to the 2nd generation in the matriline. The present study examined if symptoms can be transmitted beyond the 4th generation in the patriline. Analyses of the 5th and 6th generations of mice revealed that altered risk-taking and glucose regulation caused by postnatal stress are still manifested in the 5th generation but are attenuated in the 6th generation." (abstract, results, passage verified)
    pubmedfull study (doi)
18

Supported by research

0:09:41Stephen Porgessupportedmoderate

In preterm infants, defensive vagal slowing of heart rate can be severe enough to compromise oxygen delivery to the brain.

"their defensive systems were shutting down a lot of this vagal slowing heart rate, but slow so slow that it could actually compromise their ability to get oxygen to the brain." (said at 0:09:41)

Evidence from neonatal monitoring studies and systematic reviews demonstrates that bradycardia events (vagal-mediated slowing of heart rate) in preterm infants significantly decrease cardiac output and are associated with marked falls in cerebral tissue oxygenation and cerebral hypoxemia.

0:18:59Chris Williamson (host)supportedmoderate

95 percent of people do not consume the recommended daily amount of dietary fiber.

"95% of people don't get enough fiber." (said at 0:18:59)

National dietary survey data in the United States (such as NHANES) consistently demonstrate that approximately 95% of Americans fail to consume the recommended adequate intake of dietary fiber (typically 25 to 38 grams per day depending on age and sex), with average intakes falling well below target levels.

0:21:36Stephen Porgessupportedmoderate

Research shows that when an infant is distressed, exposure to a mother's melodic voice causes an immediate drop in heart rate, whereas a non-melodic voice does not.

"In fact, we actually did research on this where you kind of like disrupt the baby and then you talk to the baby and see what happens. And if the mother's voices were more melodic, the baby's heart rates dropped almost immediately. If the mother engaged without a melodic voice, no way." (said at 0:21:36)

Research examining infant-mother dyads following a social stressor (the Still-Face Paradigm, in which maternal engagement is disrupted and then reinstated) confirms that maternal vocal prosody—characterized by melodic speech acoustic features—is significantly associated with decreases in infant heart rate and behavioral distress. Mothers who reinstated engagement with high vocal prosody induced physiological soothing in their infants, whereas speech lacking these melodic prosodic features did not produce the same heart rate reductions.

0:12:56Stephen Porgessupportedhigh

Mammals and reptiles diverged at the same evolutionary stage and followed parallel evolutionary pathways from early vertebrates.

"as they evolved into amphibia and then basically mammals and reptiles broke off at the same time and had basically have parallel evolutionary pathways." (said at 0:12:56)

The claim accurately describes the evolutionary relationship and timeline of mammals and reptiles. Both mammalian (synapsid) and reptilian (sauropsid) lineages split from early tetrapod/amniote ancestors (which evolved from early amphibians/amphibian-like tetrapods) during the Carboniferous period over 300 million years ago, subsequently following distinct, parallel evolutionary pathways.

0:30:45Chris Williamson (host)supportedhigh

A tilt table test for autonomic response involves strapping a patient to a table and raising them to approximately 70 degrees while monitoring cardiovascular response.

"this is a a test for autonomic flexibility, autonomic response. They strap you onto a table, you've got blood pressure cuffs everywhere, heart rate sensors on your feet, on your hands, there's an IV in case you faint and need to come back around. And after you've laid down and done some breathing exercises, they raise you up to sort of 70°, and they see how your body responds." (said at 0:30:45)

Standard head-up tilt table testing protocols for autonomic and cardiovascular assessment involve securing the subject to a motorized tilt table, monitoring continuous cardiovascular parameters (such as heart rate and blood pressure), recording baseline supine measurements (often alongside autonomic breathing maneuvers), and elevating the table to 60° to 70° (most commonly 70°) to evaluate orthostatic and autonomic regulatory responses.

0:43:46Stephen Porgessupportedmoderate

Rocking subjects up 21 degrees on a motorized tilt table over a 7-second period entrains physiological rhythms associated with vascular bed activity.

"I actually was playing around with the tilt table. I had a motor on it where I rocked people up 21° and then back down to horizontal. It took 7 seconds up. So 1, 2, 3, 4, 5, 6... So the research showed that I could entrain rhythms associated with literally vascular bed activity." (said at 0:43:46)

Stephen Porges and colleagues published an experimental study in 71 healthy adults demonstrating that oscillatory head-up tilt on a motorized table (tilted to a maximum angle of +21° at 0.08 Hz, corresponding to a cycle of roughly 6 to 7 seconds per phase) selectively amplified heart rate variability in the Traube-Hering-Mayer (THM) frequency band. THM / Mayer waves reflect autonomic vasomotor activity in peripheral vascular beds and baroreflex function.

0:54:49Stephen Porgessupportedhigh

Resonance frequency breathing is typically targeted at 0.1 Hz, corresponding to a 10-second respiratory cycle (6 breaths per minute).

"And with resonant frequency they were going at 0.1 Hertz or 10 seconds." (said at 0:54:49)

The claim is accurate. Resonance frequency breathing (also known as resonance paced breathing or slow-paced breathing biofeedback) targets the baroreflex frequency of approximately 0.1 Hz, which corresponds directly to a 10-second respiratory cycle (6 breaths per minute). A frequency of 0.1 Hz is equal to 1 cycle every 10 seconds ($1 / 0.1\text{ Hz} = 10\text{ s}$), or 6 cycles/breaths per minute.

1:00:14Stephen Porgessupportedlow

The neuromuscular coordination involved in suckling, swallowing, and breathing shares the same cranial neural systems used for facial and social expressivity.

"the nerves and the neuromuscular control of suck, swallow, and breathing, that coordination are the same of social expressivity. It's the same thing. So we're in essence using the same neural system when we ingest than when we are interacting with others." (said at 1:00:14)

The claim is supported by neuroanatomical models of the mammalian autonomic nervous system, most notably Stephen Porges' Polyvagal Theory. Under this framework, the Special Visceral Efferent (SVE) pathways of cranial nerves V (trigeminal), VII (facial), IX (glossopharyngeal), X (vagus), and XI (accessory) form an integrated "Social Engagement System." These cranial nerve nuclei in the brainstem control both the feeding pathways (sucking, swallowing, and coordination with respiration) and the facial muscles, middle ear muscles, and vocal larynx/pharynx involved in facial expression and social communication. Because this formulation relies primarily on theoretical evolutionary models and neuroanatomical mapping rather than clinical trial data, the overall certainty is low.

1:10:36Stephen Porgessupportedhigh

The upper part of the human face displays more involuntary, truthful emotional expression than the lower part of the face, which is under greater voluntary motor control.

"First of all, the face would be flat. And you've seen flat faces, especially the upper part of the face. The lower part you have much more control and so you can make false smiles, but the upper part tells you really truthful emotions or feelings." (said at 1:10:36)

Neuroanatomical and neurophysiological research confirms distinct neural pathways for voluntary and involuntary facial expressions, with lower facial muscles under substantially greater direct voluntary cortical control than upper facial muscles. Primary motor cortical projections disproportionately innervate lower facial musculature, allowing precise voluntary control (such as deliberate or false smiles), whereas upper facial muscles receive bilateral cortical input and are more heavily driven by involuntary limbic and cingulate motor circuits associated with genuine emotional expressions.

1:14:09Stephen Porgessupportedhigh

Approximately 80% of the fibers of the vagus nerve are sensory afferent fibers transmitting information from the body to the brain.

"80% of the fibers of the vagus are sending sensory information to the brain. 80%. It's an internal surveillance system of our body." (said at 1:14:09)

Anatomical and physiological literature consistently establishes that the vagus nerve is a mixed nerve composed predominantly of sensory afferent fibers (approximately 80%) that transmit visceral sensory information from peripheral organs to the central nervous system, alongside roughly 20% efferent motor fibers.

1:19:15Stephen Porgessupportedhigh

Phosphatidylcholine from lecithin serves as a precursor for acetylcholine, which is utilized in vagal nerve transmission.

"for I'll say decades I've been taking lecithin, which has phosphatidylcholine, a precursor for acetylcholine, because acetylcholine is used in vagal nerve transmission and a lot of other neurotransmission." (said at 1:19:15)

The speaker's statement accurately reflects well-established biochemical and physiological facts. Lecithin is a rich dietary source of phosphatidylcholine, which supplies free choline necessary for the biosynthesis of acetylcholine. Acetylcholine is the principal neurotransmitter released by efferent vagal nerve fibers to mediate parasympathetic signaling across visceral organs, heart rate modulation, and the cholinergic anti-inflammatory pathway, in addition to its broader functions across the peripheral and central nervous systems.

1:22:36Stephen Porgessupportedmoderate

Surgical removal of internal ear structures does not eliminate tinnitus originating in the auditory cortex.

"the history of tinnitus is that people thought it was in a sense in the ear, and they actually did such things as aggressive surgeries and removed the entire ear internal ear structures. The tinnitus was still there" (said at 1:22:36)

The speaker accurately describes the clinical reality that destructive surgeries of inner ear structures (such as surgical labyrinthectomy or nerve sections) frequently fail to eliminate tinnitus, resulting in persistent tinnitus despite complete peripheral hearing destruction on the operated side. This clinical observation historically demonstrated that tinnitus generation and maintenance can become independent of the peripheral inner ear and persist within central auditory pathways.

1:23:15Stephen Porgessupportedhigh

An acoustic or vestibular neuroma is a non-malignant tumor on the vestibular branch of the auditory nerve.

"I have something called an acoustic or vestibular neuroma. It's a non-malignant tumor on the vestibular branch of the auditory nerve, and it was discovered because I started to get severe tinnitus." (said at 1:23:15)

The speaker's statement accurately describes an acoustic neuroma (more formally referred to as a vestibular schwannoma). Published medical literature and anatomical classifications confirm that these are benign (non-malignant) nerve sheath tumors that arise from the Schwann cells of the vestibular branch of the eighth cranial nerve (the vestibulocochlear or acoustic nerve).

1:28:30Stephen Porgessupportedmoderate

The autonomic nervous system is dysregulated in patients suffering from gastrointestinal disorders such as chronic vomiting syndromes.

"that the autonomic nervous system is highly dysregulated in many of the individuals who have gut problems, including chronic vomiting syndromes and symptoms like that." (said at 1:28:30)

Clinical studies assessing autonomic function in patients with functional gastrointestinal disorders, particularly cyclic vomiting syndrome (CVS), consistently demonstrate a high prevalence of autonomic nervous system dysregulation. Quantitative autonomic testing in adult and pediatric cohorts shows that between 43% and 90% of patients with CVS exhibit objective signs of autonomic dysfunction, predominantly characterized by sympathetic abnormalities such as sudomotor dysfunction and postural orthostatic tachycardia.

1:23:56Stephen Porgessupportedmoderate

Electrical stimulation of the auditory cortex is used as an intervention to disrupt or suppress certain forms of central tinnitus.

"the solution now is actually they put a stimulator on the auditory cortex to scramble those sounds." (said at 1:23:56)

Electrical stimulation of the auditory cortex—delivered via implanted epidural electrodes or non-invasive transcranial electrical stimulation techniques (such as tDCS or transcranial random noise stimulation)—has been investigated and utilized as a neuromodulatory intervention to disrupt abnormal neural synchrony and suppress phantom auditory perception in refractory central tinnitus. While it is considered an investigational or advanced neuromodulatory approach rather than a universal standard treatment, published evidence confirms its application and clinical testing for this purpose.

1:30:06Stephen Porgessupportedhigh

Historically, most biomedical and clinical trial research was conducted primarily on males because of concerns regarding greater physiological variability in females.

"most of the research on health has been done on males because females had more variability, and especially when it comes to clinical trials." (said at 1:30:06)

Historically, biomedical and preclinical research as well as clinical trials disproportionately used male subjects. Systematic reviews and bibliometric analyses confirm that a primary justification for excluding or underrepresenting females was the assumption that estrous or menstrual hormonal cycles introduced greater physiological and behavioral variability.

1:40:49Stephen Porgessupportedmoderate

Stellate ganglion blocks work by dampening sympathetic nervous system activity sufficiently to allow parasympathetic vagal activity to express itself, providing therapeutic utility for PTSD and trauma.

"I think the stellate ganglion is actually uh dampening that whole limb of the sympathetic sufficiently that the parasympathetic vagus can start to express itself. Okay. But the utility of it has been really uh in terms of the world of trauma or PTSD as far as I can tell." (said at 1:40:49)

Published clinical and mechanistic evidence supports the speaker's statement. Stellate ganglion block (SGB) involves injecting local anesthetic into the cervical sympathetic trunk to inhibit sympathetic nervous system hyperactivity. In conditions of chronic trauma and post-traumatic stress disorder (PTSD), sustained sympathetic overdrive (associated with elevated norepinephrine and autonomic dysregulation) is dampened by the block, helping restore autonomic balance. Systematic reviews, meta-analyses, and randomized controlled trials have demonstrated that SGB significantly reduces PTSD symptom severity, particularly in clusters related to physiological hyperarousal and reactivity.

1:40:49Stephen Porgessupportedmoderate

Dr. Eugene Lipov is one of the originators of using stellate ganglion blocks to treat trauma and PTSD.

"Well, so Eugene Lipov, who I know quite well, he is really one of the originators of that" (said at 1:40:49)

Dr. Eugene Lipov is widely recognized in the medical literature as one of the earliest clinicians to introduce and systematically investigate the use of stellate ganglion block (cervical sympathetic block) for post-traumatic stress disorder (PTSD). Lipov published an initial case report describing cervical sympathetic blockade for PTSD in 2008, followed by a proposed neurobiological mechanism in 2009 and subsequent clinical series evaluating the procedure for trauma and PTSD symptoms.

4

No source found (not proven false)

0:14:40Stephen Porgesunverifiedvery low

Most neural traffic in the autonomic nervous system consists of afferent signals traveling from the body organs to the brain, rather than efferent signals from the brain to the organs.

"we tend to focus on the brain neuro-regulation of the organs when most of the neural traffic is the body sending signals to the brain." (said at 0:14:40)

No published record matching the claim that most neural traffic in the autonomic nervous system consists of afferent signals traveling from the body organs to the brain rather than efferent signals from the brain to the organs was located; this does not prove the claim false.

0:35:47Stephen Porgesunverifiedvery low

A remote government-funded study evaluating a vagal nerve stimulator and Sonic Augmentation Technology (sonacea) for long COVID showed that both interventions produced significant improvements in questionnaire-assessed fatigue, anxiety, and depression over a 4-week period.

"I've just completed a study on long COVID. I was part of an interesting uh government-funded project uh basically doing it remotely. And we basically the intervention was a vagal nerve stimulator, um which was developed by a colleague of mine, and another intervention, a sound intervention that I had developed with a with a basically it's called sonacea or sonic sonic augmentation technology... And basically, the sounds had the same effectiveness as the vagal nerve stimulator. It was very profound in terms of what it did over a 4-week period. And so basically, we had massive effects on all basically all the parameters we were measuring on. They were all uh questionnaires and symptom arrays... whether they had fatigue, and whether they were anxious or depressed, and basically all the indicators improved in a very, let's say, powerful way" (said at 0:35:47)

No published record matching a remote, government-funded 4-week trial comparing a vagus nerve stimulator against Sonic Augmentation Technology for long COVID and questionnaire-assessed fatigue, anxiety, and depression was located; this does not prove the claim false.

0:46:35Stephen Porgesunverifiedvery low

The vocalization frequencies of mammals, including dogs, cats, and horses, overlap with human social communication frequencies in the auditory spectrum.

"Actually, all mammals, even little mice-like animals, they vocalize in a certain area of the auditory spectrum that is very similar if you looked at their full spectrum. So dogs, cats, and horses overlap with our uh band of social communication. So you can calm a dog or a horse or a cat by talking to them." (said at 0:46:35)

No published record matching the claim that all mammals vocalize within a similar band of the auditory spectrum overlapping human social communication frequencies was located; this does not prove the claim false.

0:46:25Stephen Porgesunverifiedvery low

The acoustic frequencies characterizing human vocal social communication and the maternal voice span approximately 500 to 3,000 Hz (or 1,500 to 3,500 Hz).

"So anything it's like 500 to 3,000 will be fine, or uh basically it enables the frequency." (said at 0:46:25)

No published record matching the claim that acoustic frequencies characterizing human vocal social communication and maternal voice span approximately 500 to 3,000 Hz was located; this does not prove the claim false.

Unverified means no publication matching the claim was located; it does not prove the claim false. Spotted an error? See the corrections policy - disputes from the people quoted are prioritized.