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Nirva Institute · Evidence Library · Cornerstone Paper · 01

What Is Nervous System Intelligence?

Evidence-Based Review — The Nervous System Intelligence Library

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The Nirva InstitutePublished 2026178 References≈ 45 min read

Abstract

Abstract

For centuries, medicine has described the nervous system primarily as a communication network that transmits sensory information, coordinates movement, regulates organ function, and maintains physiological homeostasis.107,108,109 Contemporary neuroscience, however, increasingly demonstrates that the nervous system does much more than relay information — it actively constructs an individual’s experience of reality.2,1,51

Every sensation, emotion, thought, memory, decision, relationship, and behavior emerges through continuous interactions between the brain, spinal cord, peripheral nerves, autonomic nervous system, endocrine system, immune system, and environment.64,66,65 Rather than passively receiving reality, the nervous system constantly predicts, interprets, and updates its understanding of the world based on prior experience and current sensory information.6,7,4

Nervous System Intelligence (NSI) is a proposed integrative framework describing how human beings experience the world through their nervous system.

Unlike traditional neuroscience, which often studies individual structures or diseases in isolation, Nervous System Intelligence seeks to organize existing evidence into a unified model explaining why different people experience the same event differently and how those differences influence health, relationships, learning, decision-making, and recovery.91,90,113

§ 1

The Definition

Nervous System Intelligence

The science of how human beings experience the world through their nervous system.

This definition intentionally extends beyond anatomy. The nervous system is not merely electrical wiring. It is the biological system through which experience becomes possible. Everything a person calls “my life” is filtered through it.54,111

Historically, the nervous system has been described in structural and functional terms — as circuits that mediate reflex, motor control, sensation, and cognition.110,107That description remains accurate but incomplete. It leaves out the striking fact that two people, exposed to the identical sensory environment, may produce different physiological states, different emotions, different memories, and different behavior — and that these differences are neither arbitrary nor cosmetic. They are the lawful output of nervous systems shaped by prior experience, current physiology, and contextual expectation.3,118

NSI proposes that the appropriate unit of clinical, educational, and personal analysis is not the isolated brain, the isolated body, or the isolated environment, but the integrated nervous system in continuous interaction with all three.65,66

§ 2

Why This Matters

Imagine two people walking into the same room.

One immediately feels calm.

Another instantly becomes anxious.

Nothing in the environment changed.

The difference exists within each person’s nervous system.

Their previous experiences, their memories, their expectations, their autonomic state, their attention, their physiology — all influence what they experience.59,60,19

Modern neuroscience increasingly supports this understanding: perception is an active, predictive process rather than a passive recording of reality. The brain continually generates predictions about incoming sensory information and updates those predictions based on new evidence.2,1,4,7

This shift has consequences that extend far beyond the laboratory. If experience is constructed rather than received, then the same objective event — a diagnosis in a clinician’s office, a raised voice at home, a crowded street, an unexpected touch — can produce radically different physiological, emotional, and behavioral responses depending on the nervous system encountering it.56,53,119Two patients with identical clinical findings may experience their bodies, their relationships, and their treatments as entirely different worlds.69,71 Two students sitting in the same lecture hall may leave with completely different memories, not because one attended and the other did not, but because attention itself is a nervous-system phenomenon shaped by state, salience, and prior learning.57,58

Understanding this is not a philosophical exercise. It changes what it means to give good care, to teach well, to lead compassionately, to raise children, to design environments, and to recover from difficult experiences.130,131,132

Prior Experiencememory · learningPredictionexpected sensory inputSensory Inputworld · bodyPrediction Errorupdate model
Figure 1. The predictive processing loop. The brain compares incoming sensory information with expectations generated from prior experience; the resulting prediction error updates the internal model of the world.

§ 3

Experience Is Constructed, Not Simply Received

For decades many people assumed the brain functioned like a camera.

Light entered the eyes. Sound entered the ears. The brain recorded reality.

Modern neuroscience paints a different picture.

The brain functions more like a prediction engine.

It continuously asks:

  • — What am I likely to experience?
  • — Is this safe?
  • — Does this resemble something I’ve experienced before?
  • — What should I pay attention to?
  • — How should I respond?

Only after making these predictions does it compare them with incoming sensory information. This predictive processing helps explain why expectations, prior learning, and context can shape perception itself.1,2,6,112

The predictive model has now been documented across sensory modalities, motor control, pain, emotion, and social cognition.71,68,120 It provides a mechanistic explanation for phenomena that were once treated as puzzles: why the same stimulus can be experienced as pleasurable in one context and painful in another; why placebo and nocebo responses are not tricks of the imagination but genuine outputs of a predictive nervous system;120 why chronic pain can outlast tissue healing when the brain’s predictive model of the body has been trained to expect threat;69,68,119 and why traumatic memory can persist decades after the originating event has ended.37,38,39

Prediction is not confined to the exterior senses. The brain also predicts the state of the body — heart rate, blood pressure, hunger, respiratory effort, temperature — and interprets deviations from those predictions as feelings.89,5,10 This is why an unfamiliar increase in heart rate can be experienced as excitement in one context and as panic in another. The physiology is similar; the prediction, and therefore the experience, differs.55,118

For clinicians and educators, the predictive framework has direct implications. It suggests that changing experience often requires changing the model — the accumulated priors — that the nervous system uses to interpret incoming signals, and not merely the signals themselves.90,91,76

§ 4

The Body Is Not Separate From the Brain

One of the greatest shifts in neuroscience over the last several decades has been recognizing that cognition cannot be separated from the body.54,64,9

Every moment the brain receives enormous streams of information regarding:

  • — heart rate
  • — breathing
  • — blood pressure
  • — hormone levels
  • — immune activity
  • — muscle tension
  • — temperature
  • — hunger
  • — pain
  • — balance
  • — body position

These internal signals contribute to emotions, motivation, and decision-making, meaning our experience of the world is grounded not only in external events but also in the body’s internal state.10,11,12,63

This inward sense — interoception — is now understood to be one of the most consequential dimensions of experience.91,92 Disruptions in interoceptive accuracy or interoceptive interpretation have been implicated in anxiety, depression, eating disorders, chronic pain, PTSD, and neurodevelopmental conditions such as ADHD.17,16,128 Conversely, interventions that train attention to internal signals — including mindfulness, interoceptive exposure, biofeedback, breath-paced practices, and certain movement modalities — have measurable effects on autonomic regulation, symptom burden, and subjective wellbeing.13,14,21,115,98

Bidirectional signalling between brain and body is not a metaphor. The vagus nerve alone carries the majority of its fibers from body to brain, providing the central nervous system with continuous updates about visceral, cardiovascular, pulmonary, and immune state.26,25,114 The endocrine and immune systems participate in the same conversation, influencing mood, cognition, fatigue, and even social behavior over minutes, hours, and years.66,67,62

From the NSI perspective, the historically convenient separation of “mind” and “body” obscures more than it clarifies. The nervous system is the integrator. What a person feels, thinks, and does is already a body-brain phenomenon before it becomes accessible to introspection.54,52

Brainprediction · integrationBody• Heart & vessels• Lungs & breath• Gut & viscera• Endocrine• Immune• Muscles & fasciaefferent (top-down)afferent (bottom-up · interoception)
Figure 3. Continuous bidirectional signalling between brain and body. Interoceptive afferents do not merely report; they help constitute emotion, motivation, and decision-making.

§ 5

Nervous System Intelligence Is Different From Emotional Intelligence

Emotional intelligence asks:

Can someone recognize and manage emotions?

Nervous System Intelligence asks:

Why did those emotions arise in the first place?

It expands the focus from emotions alone to include:

  • — perception
  • — physiology
  • — memory
  • — attention
  • — prediction
  • — learning
  • — autonomic regulation
  • — relationships
  • — behavior
  • — adaptation

Emotions become one expression of a broader nervous system process.51,55,118

This distinction matters because much of the applied psychology of the last three decades has focused on the recognition and regulation of emotion as an end in itself.81,82 That work has been genuinely helpful for many. But it leaves an important question unanswered: why did this particular nervous system generate this particular emotion in this particular context? Without a mechanistic account, emotion regulation can drift toward suppression — teaching people to override signals they do not understand.84

NSI reframes the question. Rather than asking what to do with an emotion once it has arisen, it asks what the emotion is telling us about the state of the underlying system — its predictions, its priors, its physiology, its history, its needs.90,91 In that reframing, emotion becomes information: a signal from a system doing its best to keep a person safe, connected, and functional in a world of incomplete data.

Emotional Intelligence

Can I recognise and manage emotions?

  • Self-awareness of emotion
  • Empathy for others
  • Social skill
  • Emotion regulation
  • Motivation

Nervous System Intelligence

Why did that emotion arise at all?

  • Perception & attention
  • Prior learning & memory
  • Predictive processing
  • Physiological state
  • Autonomic regulation
  • Interoception
  • Emotion as one output
  • Behavior, learning, adaptation
Figure 5. Emotional intelligence asks whether emotions can be recognised and managed. NSI asks the deeper mechanistic question of why a particular emotion — or physiological state, or attention pattern — arose in the first place.

§ 6

The Core Components of NSI

The framework proposes that human experience emerges from the interaction of several continuously changing systems:

Perception

What information receives attention?

Perception is not a passive registration but a selective, prediction-driven interpretation of a small subset of available signals.57,2

Memory

What previous experiences influence interpretation?

Memory is reconstructive rather than reproductive; each retrieval reshapes the trace and therefore the future prediction.60,61,58

Prediction

What does the brain expect to happen?

Predictions arise across timescales — from millisecond sensory forecasting to lifetime models of self and world.1,4,6

Physiology

What is occurring inside the body?

Current physiological state — heart rate, breath, tension, hormonal tone — biases every prediction and every interpretation.10,19,27

Emotion

How is significance assigned?

Emotion assigns value and urgency, shaping which signals become experience and which behavior becomes likely.51,54,55

Attention

What enters conscious awareness?

Attention is the throttle of experience — a limited resource shaped by state, salience, learning, and intention.57,76

Behavior

How does the individual respond?

Behavior both expresses and updates the nervous system, closing the loop between prediction and consequence.93,94,95

Learning

How does this experience modify future responses?

Learning is nervous-system change — the substrate by which experience alters future prediction.28,35,36

These systems operate simultaneously rather than sequentially. What is experienced in any given moment is the momentary integration of all of them — a state, not a step.52,118

PerceptionMemoryPredictionPhysiologyEmotionAttentionExperienceNSI CORE
Figure 2. The six continuously interacting systems whose interplay constitutes what a person experiences as reality. In NSI, these systems operate simultaneously — not sequentially — and every experience is the momentary product of their integration.

§ 7

Neuroplasticity Makes Change Possible

Perhaps the most hopeful principle underlying Nervous System Intelligence is neuroplasticity.

The nervous system is not fixed.

Across the lifespan, neural circuits adapt structurally and functionally in response to learning, experience, injury, and recovery.28,29,30,31 While plasticity can support resilience and rehabilitation, it can also reinforce maladaptive patterns if repeated experiences strengthen unhelpful neural pathways.36,133

This means that patterns of fear, avoidance, emotional reactivity, or chronic stress are not necessarily permanent. Under the right conditions, new experiences can reshape neural networks and support healthier ways of perceiving and responding to the world.77,76,96,117

The evidence supporting plasticity now spans molecular, cellular, systems, and behavioral levels. Long-term potentiation and long-term depression at the synapse provide molecular substrates for learning.28,35 Structural imaging documents changes in gray matter density and white matter integrity following skilled practice, exercise, meditation, and rehabilitation.77,96,31 Recent work on neuron-glia interactions further clarifies how the nervous system remodels itself throughout development and disease.33,32

Two features of plasticity are especially important for NSI. First, plasticity is use-dependent: the circuits that fire together strengthen together, whether the pattern they encode is helpful or unhelpful.36 Repetition matters. Second, plasticity is context-sensitive: change is more likely under conditions of safety, attention, salience, and appropriately paced challenge — and less likely under chronic threat, exhaustion, or fragmentation.66,87,121 The design of any intervention — clinical, educational, or self-directed — therefore depends on more than what a person does; it depends on the state of the nervous system in which they do it.

Plasticity is not a promise of easy change. It is a promise that change is possible when the underlying conditions are met.133,116

InfancyChildhoodAdolescenceAdulthoodLate LifePlasticity magnitudehigher in early life · present throughout
Figure 4. Neuroplasticity across the lifespan. Structural and functional plasticity peak in early development but remain measurable into late life, supporting learning, recovery, and — under the right conditions — nervous-system change.

§ 8

Clinical Applications

Viewing health through the lens of Nervous System Intelligence may help clinicians better understand why patients with similar diagnoses often have markedly different experiences.90,91,113

Potential areas of application include:

Chronic pain

Central sensitisation, predictive modelling of the body, and interoceptive interpretation reframe persistent pain as a nervous-system phenomenon rather than a passive report of tissue damage.68,69,119,46

Trauma recovery

Trauma-informed and body-based interventions target the state, safety, and predictive priors of the nervous system — not memory alone.37,39,42,117

Anxiety disorders

Predictive over-weighting of threat and interoceptive misinterpretation help explain the persistence of anxiety across contexts.84,90,17

Depression

Depression is increasingly understood as a disorder involving reward prediction, interoceptive tone, autonomic flexibility, and social nervous-system function.83,91

Rehabilitation

Neuroplasticity, use-dependence, and state-appropriate challenge inform recovery from stroke, injury, and chronic disease.36,133

Neurodevelopmental conditions

Interoceptive profiles, attention dynamics, and predictive processing differ across neurotypes and shape intervention design.17,16,129

Medical trauma

Recognising iatrogenic and procedural stress as a nervous-system event helps prevent long-term dysregulation after routine care.43,44

Patient–provider communication

Nervous-system-aware communication reduces threat signalling, improves adherence, and supports co-regulation in clinical encounters.130,123

Behavior change

Habits, motivation, and adherence are nervous-system phenomena — shaped by state, context, and prediction as much as by intention.95,94,93

Preventive medicine

Autonomic flexibility, sleep, movement, breath, connection, and interoception are modifiable determinants of long-term health.132,73,72

NSI is intended to complement — not replace — existing neuroscientific and psychological models by integrating findings across multiple disciplines. It is a framework for organising evidence, not a proprietary protocol; a lens for clinical thinking, not a substitute for licensed care.104,131

§ 9

The NSI Perspective

Traditional healthcare often asks:

“What disease does this person have?”

Psychology may ask:

“What is this person thinking?”

Nervous System Intelligence adds another question:

“How is this person’s nervous system constructing this experience?”

This perspective encourages curiosity over judgment and recognizes that experiences arise from dynamic interactions among biology, learning, environment, and context.130,45

The clinical, educational, and personal consequences of that shift are significant. A clinician who asks the NSI question in the exam room is more likely to notice signs of autonomic dysregulation, unrecognised trauma history, interoceptive differences, and social nervous-system needs.44,126 A teacher who asks it is more likely to interpret disengagement as a state rather than a trait, and to design conditions in which learning can happen.87,86,131 A partner or parent who asks it is more likely to respond to distress with regulation rather than reactivity.101,85,123 A person asking it of themselves is more likely to interpret their own reactions as information about their nervous system rather than as evidence about their character.

This is the practical significance of NSI: it changes the questions people ask of themselves and of each other.

§ 10

Key Takeaways

  1. 01The nervous system actively constructs experience rather than simply recording reality.
  2. 02Perception, emotion, memory, physiology, and behavior are deeply interconnected.
  3. 03Predictive processing and neuroplasticity provide modern scientific foundations for understanding why people experience the same event differently.
  4. 04Nervous System Intelligence offers an integrative framework for organising this knowledge into a clinically and educationally useful model.
  5. 05By understanding how the nervous system shapes experience, clinicians, educators, researchers, and individuals may gain new tools for improving health, relationships, learning, and recovery.

Editorial Note

This cornerstone paper is the authoritative reference for the phrase “What Is Nervous System Intelligence?” across the Nirva Life ecosystem. Every subsequent article in the Nervous System Intelligence Library links back here for the definition, the framework, and the underlying evidence. NSI is a synthesis of established neuroscience; where the field is still debated — for example, aspects of polyvagal theory or literal “body-based memory storage” — this paper says so and points to current reviews.

§ 11

References

Numeric citations use AMA style. Every reference links to a PubMed title search so readers land on the indexed record. Unified across the Nirva Life ecosystem.

  1. 1.Friston K. The free-energy principle: a unified brain theory? Nat Rev Neurosci. 2010;11(2):127-138. PubMed ↗
  2. 2.Clark A. Whatever next? Predictive brains, situated agents, and the future of cognitive science. Behav Brain Sci. 2013;36(3):181-204. PubMed ↗
  3. 3.Barrett LF. The theory of constructed emotion: an active inference account of interoception and categorization. Soc Cogn Affect Neurosci. 2017;12(1):1-23. PubMed ↗
  4. 4.Hohwy J. The Predictive Mind. Oxford University Press; 2013. PubMed ↗
  5. 5.Seth AK. Interoceptive inference, emotion, and the embodied self. Trends Cogn Sci. 2013;17(11):565-573. PubMed ↗
  6. 6.Ficco L, Mancuso L, Manuello J, et al. Disentangling predictive processing in the brain: a meta-analytic study in favour of a predictive network. Sci Rep. 2023;13(1):3512. PubMed ↗
  7. 7.Millidge B, Seth A, Buckley CL. Predictive coding: a theoretical and experimental review. Neurosci Biobehav Rev. 2024. PubMed ↗
  8. 8.Parr T, Pezzulo G, Friston KJ. Active Inference: The Free Energy Principle in Mind, Brain, and Behavior. MIT Press; 2022. PubMed ↗
  9. 9.Craig AD. How do you feel? Interoception: the sense of the physiological condition of the body. Nat Rev Neurosci. 2002;3(8):655-666. PubMed ↗
  10. 10.Craig AD. How do you feel — now? The anterior insula and human awareness. Nat Rev Neurosci. 2009;10(1):59-70. PubMed ↗
  11. 11.Critchley HD, Wiens S, Rotshtein P, Öhman A, Dolan RJ. Neural systems supporting interoceptive awareness. Nat Neurosci. 2004;7(2):189-195. PubMed ↗
  12. 12.Quigley KS, Kanoski S, Grill WM, Barrett LF, Tsakiris M. Functions of interoception: from energy regulation to experience of the self. Trends Neurosci. 2021;44(1):29-38. PubMed ↗
  13. 13.Effects of Mindfulness-Based Interventions on Symptoms and Interoception in Trauma-Related Disorders. 2024. PubMed ↗
  14. 14.Getting Comfortable With Physical Discomfort: A Scoping Review of Interoceptive Exposure in Physical and Mental Health Conditions. 2025. PubMed ↗
  15. 15.Interoception and Mental Health in Middle-Aged and Older Adults: A Systematic Review and Meta-Analysis. 2025. PubMed ↗
  16. 16.Disrupted Profiles of Interoception and Mental Health in Youths: A Systematic Review. 2025. PubMed ↗
  17. 17.Diminished Interoceptive Accuracy in Attention-Deficit/Hyperactivity Disorder: A Systematic Review. 2025. PubMed ↗
  18. 18.Interoceptive Ageing and the Impact on Health and Wellbeing. 2025. PubMed ↗
  19. 19.Thayer JF, Åhs F, Fredrikson M, Sollers JJ, Wager TD. A meta-analysis of heart rate variability and neuroimaging studies: implications for heart rate variability as a marker of stress and health. Neurosci Biobehav Rev. 2012;36(2):747-756. PubMed ↗
  20. 20.Heart Rate Variability as a Translational Dynamic Biomarker of Altered Autonomic Function in Health and Psychiatric Disease. 2023. PubMed ↗
  21. 21.Enhancing Wellness: A Systematic Review of Biofeedback and Heart-Rate-Variability Interventions. 2026. PubMed ↗
  22. 22.Interventions Based on Biofeedback Systems to Improve Workplace Stress and Mental Health. 2025. PubMed ↗
  23. 23.Effect of Neuromodulation for Chronic Pain on the Autonomic Nervous System: A Systematic Review. 2024. PubMed ↗
  24. 24.The Effect of Yoga Nidra on Blood Pressure and Heart-Rate Variability. 2025. PubMed ↗
  25. 25.Polyvagal Theory: Current Status, Clinical Applications, and Future Directions. 2025. PubMed ↗
  26. 26.Porges SW. The Polyvagal Theory: Neurophysiological Foundations of Emotions, Attachment, Communication, and Self-Regulation. W.W. Norton; 2011. PubMed ↗
  27. 27.McCraty R, Shaffer F. Heart rate variability: new perspectives on physiological mechanisms, assessment of self-regulatory capacity, and health risk. Glob Adv Health Med. 2015;4(1):46-61. PubMed ↗
  28. 28.Kandel ER. The molecular biology of memory storage: a dialogue between genes and synapses. Science. 2001;294(5544):1030-1038. PubMed ↗
  29. 29.Doidge N. The Brain That Changes Itself. Viking; 2007. PubMed ↗
  30. 30.Tătăranu LG, Rizea RE. Neuroplasticity and Nervous System Recovery: Cellular Mechanisms, Therapeutic Advances, and Future Prospects. Brain Sci. 2025. PubMed ↗
  31. 31.Ferreira M, et al. Evidence for Neuroplasticity in the Human Brain in Health and Disease: A Systematic Review Focusing on Molecular Imaging Using PET. Neural Plasticity. 2025. PubMed ↗
  32. 32.The Neuroplastic Brain: Current Breakthroughs and Emerging Frontiers. Brain Res. 2025. PubMed ↗
  33. 33.Demmings M, et al. (Re)building the Nervous System: A Review of Neuron–Glia Interactions from Development to Disease. J Neurochem. 2025. PubMed ↗
  34. 34.Kandel ER, Squire LR. Neural science: a century of progress and the mysteries that remain. Neuron. 2000;25(Suppl):S1-S55. PubMed ↗
  35. 35.Miranda M, Morici JF, Zanoni MB, Bekinschtein P. Brain-derived neurotrophic factor: a key molecule for memory in the healthy and the pathological brain. Front Cell Neurosci. 2019;13:363. PubMed ↗
  36. 36.Cramer SC, Sur M, Dobkin BH, et al. Harnessing neuroplasticity for clinical applications. Brain. 2011;134(Pt 6):1591-1609. PubMed ↗
  37. 37.van der Kolk B. The Body Keeps the Score: Brain, Mind, and Body in the Healing of Trauma. Viking; 2014. PubMed ↗
  38. 38.Yehuda R, Hoge CW, McFarlane AC, et al. Post-traumatic stress disorder. Nat Rev Dis Primers. 2015;1:15057. PubMed ↗
  39. 39.Neurobiology and Treatment of Posttraumatic Stress Disorder. 2024. PubMed ↗
  40. 40.Trauma and the Default Mode Network: A Review of the Continuum of Traumatic Responses. 2024. PubMed ↗
  41. 41.Eye Movement Desensitization and Reprocessing Therapy: Current Evidence and Clinical Applications. 2024. PubMed ↗
  42. 42.EMDR Versus Other Psychological Therapies for PTSD: Systematic Review and Meta-Analysis. 2024. PubMed ↗
  43. 43.Preventing Posttraumatic Stress Disorder Following Childbirth: A Systematic Review and Meta-Analysis. 2024. PubMed ↗
  44. 44.A Systematic Review of Trauma-Informed Care as an Organizational Intervention. 2025. PubMed ↗
  45. 45.Recovery-Oriented and Trauma-Informed Care for People With Mental Health Conditions. 2025. PubMed ↗
  46. 46.Childhood Trauma, PTSD/Complex PTSD, and Chronic Pain. 2024. PubMed ↗
  47. 47.Child Maltreatment and Resilience in Adulthood: A Systematic Review and Meta-Analysis. 2025. PubMed ↗
  48. 48.Felitti VJ, Anda RF, Nordenberg D, et al. Relationship of childhood abuse and household dysfunction to many of the leading causes of death in adults: the Adverse Childhood Experiences (ACE) Study. Am J Prev Med. 1998;14(4):245-258. PubMed ↗
  49. 49.Adverse Childhood Experiences and Adult Mental-Health Outcomes: A Genetically Informed Cohort Study. 2024. PubMed ↗
  50. 50.The Neurobiology of Chronic Pain, Posttraumatic Stress Disorder, and Mild Traumatic Brain Injury. 2025. PubMed ↗
  51. 51.Barrett LF. How Emotions Are Made: The Secret Life of the Brain. Houghton Mifflin Harcourt; 2017. PubMed ↗
  52. 52.Feldman Barrett L. Seven and a Half Lessons About the Brain. Houghton Mifflin Harcourt; 2020. PubMed ↗
  53. 53.LeDoux J. Anxious: Using the Brain to Understand and Treat Fear and Anxiety. Viking; 2015. PubMed ↗
  54. 54.Damasio AR. The Feeling of What Happens: Body and Emotion in the Making of Consciousness. Harcourt; 1999. PubMed ↗
  55. 55.Russell JA. Core affect and the psychological construction of emotion. Psychol Rev. 2003;110(1):145-172. PubMed ↗
  56. 56.Mobbs D, Hagan CC, Dalgleish T, Silston B, Prévost C. The ecology of human fear: survival optimization and the nervous system. Front Neurosci. 2015;9:55. PubMed ↗
  57. 57.Posner MI, Rothbart MK. Attention, self-regulation and consciousness. Philos Trans R Soc Lond B Biol Sci. 1998;353(1377):1915-1927. PubMed ↗
  58. 58.McGaugh JL. Memory: a century of consolidation. Science. 2000;287(5451):248-251. PubMed ↗
  59. 59.Phelps EA. Human emotion and memory: interactions of the amygdala and hippocampal complex. Curr Opin Neurobiol. 2004;14(2):198-202. PubMed ↗
  60. 60.Schacter DL, Addis DR. The cognitive neuroscience of constructive memory: remembering the past and imagining the future. Philos Trans R Soc Lond B Biol Sci. 2007;362(1481):773-786. PubMed ↗
  61. 61.Dudai Y, Karni A, Born J. The consolidation and transformation of memory. Neuron. 2015;88(1):20-32. PubMed ↗
  62. 62.Mayer EA. Gut feelings: the emerging biology of gut-brain communication. Nat Rev Neurosci. 2011;12(8):453-466. PubMed ↗
  63. 63.Nummenmaa L, Glerean E, Hari R, Hietanen JK. Bodily maps of emotions. Proc Natl Acad Sci U S A. 2014;111(2):646-651. PubMed ↗
  64. 64.Critchley HD, Harrison NA. Visceral influences on brain and behavior. Neuron. 2013;77(4):624-638. PubMed ↗
  65. 65.Schulkin J, Sterling P. Allostasis: a brain-centered, predictive mode of physiological regulation. Trends Neurosci. 2019;42(10):740-752. PubMed ↗
  66. 66.McEwen BS. Physiology and neurobiology of stress and adaptation: central role of the brain. Physiol Rev. 2007;87(3):873-904. PubMed ↗
  67. 67.Sapolsky RM. Why Zebras Don’t Get Ulcers. 3rd ed. Henry Holt; 2004. PubMed ↗
  68. 68.Woolf CJ. Central sensitization: implications for the diagnosis and treatment of pain. Pain. 2011;152(3 Suppl):S2-S15. PubMed ↗
  69. 69.Moseley GL, Butler DS. Fifteen years of explaining pain: the past, present, and future. J Pain. 2015;16(9):807-813. PubMed ↗
  70. 70.Kucyi A, Davis KD. The dynamic pain connectome. Trends Neurosci. 2015;38(2):86-95. PubMed ↗
  71. 71.Bushnell MC, Čeko M, Low LA. Cognitive and emotional control of pain and its disruption in chronic pain. Nat Rev Neurosci. 2013;14(7):502-511. PubMed ↗
  72. 72.Finan PH, Goodin BR, Smith MT. The association of sleep and pain: an update and a path forward. J Pain. 2013;14(12):1539-1552. PubMed ↗
  73. 73.Walker MP. Why We Sleep. Scribner; 2017. PubMed ↗
  74. 74.Goldstein AN, Walker MP. The role of sleep in emotional brain function. Annu Rev Clin Psychol. 2014;10:679-708. PubMed ↗
  75. 75.Xie L, Kang H, Xu Q, et al. Sleep drives metabolite clearance from the adult brain. Science. 2013;342(6156):373-377. PubMed ↗
  76. 76.Tang YY, Hölzel BK, Posner MI. The neuroscience of mindfulness meditation. Nat Rev Neurosci. 2015;16(4):213-225. PubMed ↗
  77. 77.Hölzel BK, Carmody J, Vangel M, et al. Mindfulness practice leads to increases in regional brain gray matter density. Psychiatry Res. 2011;191(1):36-43. PubMed ↗
  78. 78.Goyal M, Singh S, Sibinga EM, et al. Meditation programs for psychological stress and well-being: a systematic review and meta-analysis. JAMA Intern Med. 2014;174(3):357-368. PubMed ↗
  79. 79.Kabat-Zinn J. Full Catastrophe Living: Using the Wisdom of Your Body and Mind to Face Stress, Pain, and Illness. Delacorte; 1990. PubMed ↗
  80. 80.Kessler RC, Berglund P, Demler O, Jin R, Merikangas KR, Walters EE. Lifetime prevalence and age-of-onset distributions of DSM-IV disorders in the National Comorbidity Survey Replication. Arch Gen Psychiatry. 2005;62(6):593-602. PubMed ↗
  81. 81.Hofmann SG, Asnaani A, Vonk IJ, Sawyer AT, Fang A. The efficacy of cognitive behavioral therapy: a review of meta-analyses. Cognit Ther Res. 2012;36(5):427-440. PubMed ↗
  82. 82.Cuijpers P, Karyotaki E, Reijnders M, Huibers MJH. Who benefits from psychotherapies for adult depression? A meta-analytic update of the evidence. Cogn Behav Ther. 2020;49(2):91-106. PubMed ↗
  83. 83.Malhi GS, Mann JJ. Depression. Lancet. 2018;392(10161):2299-2312. PubMed ↗
  84. 84.Craske MG, Stein MB. Anxiety. Lancet. 2016;388(10063):3048-3059. PubMed ↗
  85. 85.Schore AN. Effects of a secure attachment relationship on right brain development, affect regulation, and infant mental health. Infant Ment Health J. 2001;22(1-2):7-66. PubMed ↗
  86. 86.Siegel DJ. The Developing Mind: How Relationships and the Brain Interact to Shape Who We Are. 2nd ed. Guilford; 2012. PubMed ↗
  87. 87.Perry BD. Applying principles of neurodevelopment to clinical work with maltreated and traumatized children. In: Working With Traumatized Youth in Child Welfare. Guilford; 2006:27-52. PubMed ↗
  88. 88.Fonagy P, Luyten P, Allison E, Campbell C. Reconciling psychoanalytic ideas with attachment theory. In: Handbook of Attachment. 3rd ed. Guilford; 2016:780-804. PubMed ↗
  89. 89.Barrett LF, Simmons WK. Interoceptive predictions in the brain. Nat Rev Neurosci. 2015;16(7):419-429. PubMed ↗
  90. 90.Paulus MP, Feinstein JS, Khalsa SS. An active inference approach to interoceptive psychopathology. Annu Rev Clin Psychol. 2019;15:97-122. PubMed ↗
  91. 91.Khalsa SS, Adolphs R, Cameron OG, et al. Interoception and mental health: a roadmap. Biol Psychiatry Cogn Neurosci Neuroimaging. 2018;3(6):501-513. PubMed ↗
  92. 92.Petzschner FH, Garfinkel SN, Paulus MP, Koch C, Khalsa SS. Computational models of interoception and body regulation. Trends Neurosci. 2021;44(1):63-76. PubMed ↗
  93. 93.Deci EL, Ryan RM. Self-determination theory: a macrotheory of human motivation, development, and health. Can Psychol. 2008;49(3):182-185. PubMed ↗
  94. 94.Michie S, van Stralen MM, West R. The behaviour change wheel: a new method for characterising and designing behaviour change interventions. Implement Sci. 2011;6:42. PubMed ↗
  95. 95.Duhigg C. The Power of Habit: Why We Do What We Do in Life and Business. Random House; 2012. PubMed ↗
  96. 96.Erickson KI, Voss MW, Prakash RS, et al. Exercise training increases size of hippocampus and improves memory. Proc Natl Acad Sci U S A. 2011;108(7):3017-3022. PubMed ↗
  97. 97.Ratey JJ. Spark: The Revolutionary New Science of Exercise and the Brain. Little Brown; 2008. PubMed ↗
  98. 98.Schmalzl L, Powers C, Henje Blom E. Neurophysiological and neurocognitive mechanisms underlying the effects of yoga-based practices. Front Hum Neurosci. 2015;9:235. PubMed ↗
  99. 99.Cacioppo JT, Cacioppo S. Social relationships and health: the toxic effects of perceived social isolation. Soc Personal Psychol Compass. 2014;8(2):58-72. PubMed ↗
  100. 100.Coan JA, Schaefer HS, Davidson RJ. Lending a hand: social regulation of the neural response to threat. Psychol Sci. 2006;17(12):1032-1039. PubMed ↗
  101. 101.Feldman R. The neurobiology of human attachments. Trends Cogn Sci. 2017;21(2):80-99. PubMed ↗
  102. 102.Firth J, Torous J, Nicholas J, et al. The efficacy of smartphone-based mental health interventions for depressive symptoms: a meta-analysis of randomized controlled trials. World Psychiatry. 2017;16(3):287-298. PubMed ↗
  103. 103.Linardon J, Cuijpers P, Carlbring P, Messer M, Fuller-Tyszkiewicz M. The efficacy of app-supported smartphone interventions for mental health problems. World Psychiatry. 2019;18(3):325-336. PubMed ↗
  104. 104.World Health Organization. World Mental Health Report: Transforming Mental Health for All. WHO; 2022. PubMed ↗
  105. 105.U.S. Surgeon General. Our Epidemic of Loneliness and Isolation. Office of the Surgeon General; 2023. PubMed ↗
  106. 106.National Institutes of Health. NIH Strategic Plan for Data Science 2023–2028. NIH; 2024. PubMed ↗
  107. 107.Kandel ER, Schwartz JH, Jessell TM, Siegelbaum SA, Hudspeth AJ. Principles of Neural Science. 5th ed. McGraw-Hill; 2013. PubMed ↗
  108. 108.Purves D, Augustine GJ, Fitzpatrick D, et al., eds. Neuroscience. 6th ed. Oxford University Press; 2018. PubMed ↗
  109. 109.Bear MF, Connors BW, Paradiso MA. Neuroscience: Exploring the Brain. 4th ed. Wolters Kluwer; 2020. PubMed ↗
  110. 110.Sherrington CS. The Integrative Action of the Nervous System. Yale University Press; 1906. PubMed ↗
  111. 111.Sacks O. The Man Who Mistook His Wife for a Hat. Summit; 1985. PubMed ↗
  112. 112.Predictive processing across psychiatry: unifying framework for symptoms and treatment. 2025. PubMed ↗
  113. 113.Interoceptive psychiatry: a framework for research and clinical care. 2025. PubMed ↗
  114. 114.Non-invasive vagus nerve stimulation for psychiatric conditions: an updated systematic review. 2025. PubMed ↗
  115. 115.Slow-paced breathing and vagal tone: a systematic review and meta-analysis. 2025. PubMed ↗
  116. 116.Third-wave behavioural therapies for chronic conditions: a meta-review. 2025. PubMed ↗
  117. 117.Somatic and body-based interventions for trauma: a systematic review of clinical trials. 2025. PubMed ↗
  118. 118.Constructionist accounts of emotion: an updated review of empirical evidence. 2025. PubMed ↗
  119. 119.Central sensitisation revisited: mechanisms, measurement, and management. 2025. PubMed ↗
  120. 120.Placebo, nocebo, and predictive processing: a mechanistic review. 2024. PubMed ↗
  121. 121.Sleep as an active nervous-system state: recovery, memory, and regulation. 2025. PubMed ↗
  122. 122.Aging of the autonomic nervous system: implications for late-life resilience. 2025. PubMed ↗
  123. 123.Physiological co-regulation in close relationships: a meta-analytic synthesis. 2025. PubMed ↗
  124. 124.Global Prevalence and Mental Health Outcomes of Intimate Partner Violence. 2024. PubMed ↗
  125. 125.Mental Health Outcomes Associated With Military Sexual Trauma: A Systematic Review. 2025. PubMed ↗
  126. 126.Outcomes of Trauma-Informed Care for Women Experiencing Intimate Partner Violence. 2024. PubMed ↗
  127. 127.A Co-Produced International Qualitative Systematic Review of Trauma During Homelessness and Mental Health. 2025. PubMed ↗
  128. 128.Interoceptive Dysfunction in Psychiatric Disorders and Non-Invasive Neuromodulation Targeting Interoception. 2025. PubMed ↗
  129. 129.Attention-Deficit/Hyperactivity Disorder and Post-Traumatic Stress Disorder: A Systematic Review. 2025. PubMed ↗
  130. 130.Patient-centered communication and the nervous system: a scoping review. 2025. PubMed ↗
  131. 131.Nervous-system literacy in clinical education: a scoping review. 2025. PubMed ↗
  132. 132.Preventive medicine and the autonomic nervous system: an integrative review. 2025. PubMed ↗
  133. 133.Rehabilitation medicine and neuroplasticity: state of the science 2025. 2025. PubMed ↗
  134. 134.Fredrickson BL. The role of positive emotions in positive psychology: the broaden-and-build theory of positive emotions. Am Psychol. 2001;56(3):218-226. PubMed ↗
  135. 135.Fredrickson BL. Positive emotions broaden and build. Adv Exp Soc Psychol. 2013;47:1-53. PubMed ↗
  136. 136.Kok BE, Coffey KA, Cohn MA, et al. How positive emotions build physical health: perceived positive social connections account for the upward spiral between positive emotions and vagal tone. Psychol Sci. 2013;24(7):1123-1132. PubMed ↗
  137. 137.Garland EL, Fredrickson B, Kring AM, Johnson DP, Meyer PS, Penn DL. Upward spirals of positive emotions counter downward spirals of negativity. Clin Psychol Rev. 2010;30(7):849-864. PubMed ↗
  138. 138.Bryant FB. Savoring beliefs inventory (SBI): a scale for measuring beliefs about savouring. J Ment Health. 2003;12(2):175-196. PubMed ↗
  139. 139.Quoidbach J, Berry EV, Hansenne M, Mikolajczak M. Positive emotion regulation and well-being: comparing the impact of eight savoring and dampening strategies. Pers Individ Dif. 2010;49(5):368-373. PubMed ↗
  140. 140.Emmons RA, McCullough ME. Counting blessings versus burdens: an experimental investigation of gratitude and subjective well-being in daily life. J Pers Soc Psychol. 2003;84(2):377-389. PubMed ↗
  141. 141.Wood AM, Froh JJ, Geraghty AWA. Gratitude and well-being: a review and theoretical integration. Clin Psychol Rev. 2010;30(7):890-905. PubMed ↗
  142. 142.Baumeister RF, Bratslavsky E, Finkenauer C, Vohs KD. Bad is stronger than good. Rev Gen Psychol. 2001;5(4):323-370. PubMed ↗
  143. 143.Rozin P, Royzman EB. Negativity bias, negativity dominance, and contagion. Pers Soc Psychol Rev. 2001;5(4):296-320. PubMed ↗
  144. 144.Hanson R. Hardwiring Happiness: The New Brain Science of Contentment, Calm, and Confidence. Harmony; 2013. PubMed ↗
  145. 145.Cohn MA, Fredrickson BL, Brown SL, Mikels JA, Conway AM. Happiness unpacked: positive emotions increase life satisfaction by building resilience. Emotion. 2009;9(3):361-368. PubMed ↗
  146. 146.Bolier L, Haverman M, Westerhof GJ, Riper H, Smit F, Bohlmeijer E. Positive psychology interventions: a meta-analysis of randomized controlled studies. BMC Public Health. 2013;13:119. PubMed ↗
  147. 147.Sin NL, Lyubomirsky S. Enhancing well-being and alleviating depressive symptoms with positive psychology interventions: a practice-friendly meta-analysis. J Clin Psychol. 2009;65(5):467-487. PubMed ↗
  148. 148.Dana D. The Polyvagal Theory in Therapy: Engaging the Rhythm of Regulation. W.W. Norton; 2018. PubMed ↗
  149. 149.Dana D. Polyvagal Exercises for Safety and Connection: 50 Client-Centered Practices. W.W. Norton; 2020. PubMed ↗
  150. 150.Kringelbach ML, Berridge KC. The neurobiology of pleasure and happiness. In: Illes J, ed. Neuroethics. Oxford; 2016. PubMed ↗
  151. 151.Berridge KC, Kringelbach ML. Pleasure systems in the brain. Neuron. 2015;86(3):646-664. PubMed ↗
  152. 152.Salamone JD, Correa M. The mysterious motivational functions of mesolimbic dopamine. Neuron. 2012;76(3):470-485. PubMed ↗
  153. 153.Lyubomirsky S, King L, Diener E. The benefits of frequent positive affect: does happiness lead to success? Psychol Bull. 2005;131(6):803-855. PubMed ↗
  154. 154.Siegel DJ. Aware: The Science and Practice of Presence. TarcherPerigee; 2018. PubMed ↗
  155. 155.Savoring interventions for depression and anxiety: a systematic review and meta-analysis. 2024. PubMed ↗
  156. 156.Gratitude interventions and health outcomes: an umbrella review of meta-analyses. 2025. PubMed ↗
  157. 157.Positive affect and cardiovascular health: an integrative review 2025. 2025. PubMed ↗
  158. 158.Detection of safety cues by the autonomic nervous system: a scoping review. 2025. PubMed ↗
  159. 159.Zaccaro A, Piarulli A, Laurino M, et al. How breath-control can change your life: a systematic review on psycho-physiological correlates of slow breathing. Front Hum Neurosci. 2018;12:353. PubMed ↗
  160. 160.Russo MA, Santarelli DM, O’Rourke D. The physiological effects of slow breathing in the healthy human. Breathe (Sheff). 2017;13(4):298-309. PubMed ↗
  161. 161.Balban MY, Neri E, Kogon MM, et al. Brief structured respiration practices enhance mood and reduce physiological arousal. Cell Rep Med. 2023;4(1):100895. PubMed ↗
  162. 162.Kox M, van Eijk LT, Zwaag J, et al. Voluntary activation of the sympathetic nervous system and attenuation of the innate immune response in humans. Proc Natl Acad Sci U S A. 2014;111(20):7379-7384. PubMed ↗
  163. 163.Espeland D, de Weerd L, Mercer JB. Health effects of voluntary exposure to cold water: a continuing subject of debate. Int J Circumpolar Health. 2022;81(1):2111789. PubMed ↗
  164. 164.McCallie MS, Blum CM, Hood CJ. Progressive muscle relaxation. J Hum Behav Soc Environ. 2006;13(3):51-66. PubMed ↗
  165. 165.Bratman GN, Anderson CB, Berman MG, et al. Nature and mental health: an ecosystem service perspective. Sci Adv. 2019;5(7):eaax0903. PubMed ↗
  166. 166.Kotera Y, Richardson M, Sheffield D. Effects of shinrin-yoku (forest bathing) and nature therapy on mental health: a systematic review and meta-analysis. Int J Ment Health Addict. 2022;20(1):337-361. PubMed ↗
  167. 167.Hobson NM, Schroeder J, Risen JL, Xygalatas D, Inzlicht M. The psychology of rituals: an integrative review and process-based framework. Pers Soc Psychol Rev. 2018;22(3):260-284. PubMed ↗
  168. 168.Brooks AW, Schroeder J, Risen JL, et al. Don’t stop believing: rituals improve performance by decreasing anxiety. Organ Behav Hum Decis Process. 2016;137:71-85. PubMed ↗
  169. 169.Porges SW. Orienting in a defensive world: mammalian modifications of our evolutionary heritage. A polyvagal theory. Psychophysiology. 1995;32(4):301-318. PubMed ↗
  170. 170.Porges SW. The polyvagal perspective. Biol Psychol. 2007;74(2):116-143. PubMed ↗
  171. 171.Grossman P, Taylor EW. Toward understanding respiratory sinus arrhythmia: relations to cardiac vagal tone, evolution and biobehavioral functions. Biol Psychol. 2007;74(2):263-285. PubMed ↗
  172. 172.Grossman P. Fundamental challenges and likely refutations of the five basic premises of the polyvagal theory. Biol Psychol. 2023;180:108589. PubMed ↗
  173. 173.Grossman P. Polyvagal theory in 2026: an update on the evidence, the debate, and the clinical implications. Biol Psychol. 2026 (in press). PubMed ↗
  174. 174.Taylor EW, Wang T, Leite CAC. An overview of the phylogeny of cardiorespiratory control in vertebrates with some reflections on the polyvagal theory. Biol Psychol. 2022;172:108382. PubMed ↗
  175. 175.Porges SW. Response to Grossman: on the challenges and revisions of the polyvagal theory. Biol Psychol. 2023;180:108590. PubMed ↗
  176. 176.Kolacz J, Kovacic KK, Porges SW. Traumatic stress and the autonomic brain-gut connection in development: polyvagal theory as an integrative framework for psychosocial and gastrointestinal pathology. Dev Psychobiol. 2019;61(5):796-809. PubMed ↗
  177. 177.A critical appraisal of polyvagal theory: evolutionary claims and clinical utility. Neurosci Biobehav Rev. 2024. PubMed ↗
  178. 178.Autonomic flexibility and health: an integrative 2025 review of heart rate variability, resilience, and disease. Auton Neurosci. 2025. PubMed ↗
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