Trauma and the body

09Trauma Healing

Comprehensive coverage of trauma resolution approaches, including Somatic Experiencing, EMDR, IFS, breathwork, and the neurobiology of trauma. This section addresses the critical role the body plays in storing and releasing traumatic experiences.

Why Trauma Healing Matters

Trauma is not just a psychological event — it's stored in the body:

• Trauma lives in the nervous system — The autonomic nervous system can become stuck in survival states (fight, flight, freeze)
• Somatic signatures — Trauma creates physical patterns: muscle tension, restricted breathing, postural changes
• Polyvagal theory — Stephen Porges' work shows how the vagus nerve mediates our response to threat
• Healing requires body-based approaches — Talk therapy alone often cannot release stored trauma

The somatic approach recognizes that:

1. Trauma creates physiological dysregulation
2. The body holds implicit memory of traumatic events
3. Resolution requires completing the survival response that was interrupted
4. The therapeutic relationship is key to creating safety for discharge

Foundational

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Modalities

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Specialized

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Somatic Experiencing (SE)

Developed by Peter Levine based on observing animal survival behaviors: - Focuses on completing interrupted survival responses - UsesPendulation (alternating between resource and overwhelm) - Body-awareness-based - Gentle, titrated approach

EMDR

Francine Shapiro's approach using bilateral stimulation: - Originally using eye movements - Now includes tactile and auditory bilateral stimulation - 8-phase protocol - Evidence-based for PTSD (multiple RCTs)

IFS (Internal Family Systems)

Richard Schwartz's parts-based model: - Conceptualizes psyche as multiple "parts" - The "Self" is the core healing agent - Unburdening of exiled parts - Growing evidence base

Brainspotting

David Grand's approach: - Identifies "brainspots" — eye positions linked to trauma - Uses therapist's attunement to find processing points - Combines SE and EMDR elements

TRE (Tension and Trauma Releasing Exercises)

David Berceli's method: - Exercises that induce involuntary tremors - Releases stored muscular tension - Can be self-administered after training

Evidence Level by Modality

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Polyvagal Theory Foundation

Stephen Porges' Polyvagal Theory is foundational to modern trauma treatment:

Three Phylogenetic States:

1. Ventral vagal (Social engagement) — Safe, connected, curious
2. Sympathetic (Fight/Flight) — Mobilization, survival
3. Dorsal vagal (Shutdown/Collapse) — Immobilization, dissociation

Clinical Implications:

• Safety is prerequisite — Cannot process trauma from dorsal vagal state
• Co-regulation — The therapist's ventral vagal state can regulate the client
• Bottom-up processing — Address physiological state before cognitive processing

See Polyvagal Theory for details.

Finding a Practitioner

• SE: somaticexperiencing.com
• EMDR: emdria.org
• IFS: internalfamilysystems.org
• Brainspotting: brainspotting.com

Self-Help Approaches

• TRE can be self-taught after initial training
• Breathwork (connected, coherent breathing) can be practiced independently
• Body awareness practices (yoga, tai chi) support regulation

What to Expect

• Trauma work is typically slower than other therapy
• Physical sensations are common and expected
• Progress is often non-linear
• The therapeutic relationship is important

Connection to Other Sections

• Overview - Somatic Experiencing — Detailed SE content
• Peptide Therapy — Certain peptides may support nervous system regulation
• Sleep Optimization — Trauma affects sleep; sleep affects trauma resolution

10Trauma and the Nervous System

Overview

Trauma is fundamentally a disorder of the nervous system — not a cognitive, emotional, or psychological problem. While the psychological symptoms of trauma (flashbacks, nightmares, hypervigilance, emotional dysregulation) are what most people recognize, they are downstream effects of a nervous system that has become stuck in survival mode.

Understanding the neurobiology of trauma is essential for anyone seeking to heal from it, because it explains: - Why trauma persists long after the event is over - Why talk therapy alone often isn't sufficient - Why body-based approaches like Somatic Experiencing are effective - Why trauma manifests as physical symptoms (chronic pain, digestive issues, autoimmune disease)

This note covers the core neurobiological mechanisms. For practical techniques, see Techniques and Protocols. For the theoretical framework, see Peter Levine Work. For the broader context, see Polyvagal Theory.

The Two Branches

The autonomic nervous system (ANS) controls all the body's automatic functions — heart rate, digestion, breathing, blood pressure, immune function, and the stress response. It has two main branches:

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The Vagus Nerve

The primary conduit of the parasympathetic system is the vagus nerve (cranial nerve X):

• Connects the brainstem to the heart, lungs, and digestive tract
• 80–90% of vagus nerve fibers are afferent — carrying information FROM the body TO the brain
• This means the body sends far more information to the brain than the brain sends down
• The vagus nerve is the body's primary "safety detector" — constantly informing the brain about internal state

Vagal tone — the degree to which the vagus nerve effectively modulates the stress response — is a key indicator of nervous system health and trauma resilience.

The Polyvagal Framework

For the full treatment, see Polyvagal Theory. Here, the key elements relevant to trauma:

The Three-Tier Autonomic Hierarchy

Stephen Porges' Polyvagal Theory describes three distinct autonomic states, organized phylogenetically (from oldest to most recently evolved):

1. Ventral Vagal — Social Engagement (Connection)

• Evolved: Most recently; unique to mammals
• Function: Safety, connection, social engagement
• Neural pathway: Myelinated ventral vagus
• Characteristics: Openness, curiosity, compassion, playfulness
• Physiology: Regulated heart rate, good digestion, facial expression, vocal prosody
• Connected to: Muscles of face, middle ear, larynx — the "social engagement system"

2. Sympathetic — Mobilization (Fight/Flight)

• Evolved: ~400 million years ago
• Function: Active defense — confront or escape threat
• Characteristics: Hyperarousal, anxiety, anger, agitation, hypervigilance
• Physiology: ↑ Heart rate, ↑ blood pressure, ↑ adrenaline, ↑ cortisol
• When stuck: Chronic anxiety, inability to relax, anger issues, panic disorder

3. Dorsal Vagal — Immobilization (Freeze/Shutdown)

• Evolved: Most primitive; shared with reptiles and fish
• Function: Last-resort survival — "playing dead" when fight/flight isn't possible
• Characteristics: Numbness, dissociation, collapse, shame, hopelessness
• Physiology: ↓ Heart rate, ↓ blood pressure, ↓ metabolism
• When stuck: Depression, chronic fatigue, dissociation, "spacing out"

Neuroception

Porges coined "neuroception" — the subconscious process by which the nervous system evaluates risk:

• Occurs entirely below conscious awareness — faster than thought
• Determines whether we feel safe, in danger, or under life threat
• When neuroception is miscalibrated (due to trauma), neutral stimuli register as threatening
• This explains why trauma survivors react to objectively safe situations as if they're dangerous

The Four Survival Responses

When the nervous system detects threat (through neuroception), it activates one or more survival responses:

Fight

• Biological function: Confront and defeat the threat
• Activation pattern: Sympathetic → ventral vagal withdrawal → anger/aggression
• When thwarted: Chronic anger, conflict-seeking, controlling behavior
• Physical signature: Jaw clenching, fist clenching, raised shoulders, rigid posture

Flight

• Biological function: Escape the threat
• Activation pattern: Sympathetic → ventral vagal withdrawal → fear/avoidance
• When thwarted: Chronic anxiety, avoidance, "always running," workaholism
• Physical signature: Shallow breathing, restlessness, inability to sit still

Freeze

• Biological function: Survive by becoming immobile — the predator loses interest
• Activation pattern: Extreme sympathetic activation → sudden dorsal vagal co-activation → collapse/immobilization
• When thwarted: Chronic dissociation, numbness, inability to act, "spacing out"
• Physical signature: Flat affect, stillness, cold extremities, slow/shallow breathing

Fawn

• Biological function: Appease the threat by pleasing the aggressor (identified by therapist Pete Walker)
• Activation pattern: Combination of sympathetic activation + social engagement hijacking
• When thwarted: People-pleasing, inability to set boundaries, self-abandonment
• Physical signature: Smiling while distressed, over-compliance, submissive posture

The Critical Distinction: Response vs. Reaction

A healthy nervous system responds to threat (appropriate activation → resolution → return to baseline). A traumatized nervous system reacts (inappropriate activation → incomplete resolution → chronic dysregulation).

The "Stuck" Nervous System

Trauma occurs when the survival response is activated but not completed:

Normal:     Threat → Response → Completion → Resolution → Homeostasis
Traumatic:  Threat → Response → Incompletion → Trapped Energy → Chronic Dysregulation

Why responses don't complete: - The threat is overwhelming (too big, too fast, too sudden) - The person is physically constrained (can't fight or flee) - Social pressures inhibit the response ("don't cry," "be strong") - Repeated threats prevent the nervous system from resetting - The person is a child (limited physical capacity to respond)

The Self-Reinforcing Cycle

Once the nervous system is stuck, it creates a self-reinforcing cycle:

1. Neuroception recalibrates → detects threat everywhere
2. Baseline shifts → "normal" becomes hyperaroused or hypoaroused
3. Triggers proliferate → more stimuli activate the threat response
4. Avoidance increases → the person avoids triggers, limiting life
5. The threat response strengthens → through repeated activation (neuroplasticity)
6. Health deteriorates → chronic ANS dysregulation → physical illness

Key Brain Regions

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The Amygdala Hijack

In trauma, the amygdala becomes the default decision-maker: - Normally, the prefrontal cortex can modulate amygdala-driven fear responses ("That's not a tiger, it's a shadow") - In trauma, the amygdala activates before the prefrontal cortex can intervene - The result: automatic, uncontrollable threat responses to non-threatening stimuli - The person knows they're safe but feels they're in danger

Memory Fragmentation

Traumatic memories are encoded differently from normal memories:

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This explains why traumatized people experience flashbacks — the memory lacks temporal context, so it feels like it's happening in the present.

The Body Keeps the Score

As Bessel van der Kolk documented, chronic ANS dysregulation produces a wide range of physical symptoms:

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The Gut-Brain Axis

The connection between trauma and digestive disorders is particularly well-documented:

• The gut has its own nervous system — the enteric nervous system — with more neurons than the spinal cord
• The gut communicates with the brain through the vagus nerve (80-90% of fibers carry information FROM gut TO brain)
• Trauma disrupts this communication → gut dysbiosis, leaky gut, inflammation
• The result: digestive symptoms that are real and physical, not "all in your head"

The Adverse Childhood Experiences Study

The ACE Study (Felitti et al., 1998) was a landmark epidemiological study that demonstrated the profound long-term health effects of childhood trauma:

• 17,000+ participants — primarily middle-class, college-educated Americans
• 10 categories of adverse childhood experiences measured (abuse, neglect, household dysfunction)
• Dose-response relationship: More ACEs → worse health outcomes

Key findings:

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Mechanism: ACEs cause chronic activation of the stress response → "toxic stress" → altered brain development → ANS dysregulation → physical disease decades later.

Why Body-Based Approaches Work

The neurobiology of trauma explains why approaches like SE are effective:

1. Trauma is stored subcortically — in the ANS, limbic system, and brainstem, not in the thinking brain
2. Body-based approaches access these regions directly — through interoception and proprioception
3. The insula and anterior cingulate — which mediate body awareness — have strong, direct connections to subcortical structures
4. Cognitive approaches have weak, indirect connections — the prefrontal cortex has limited influence over the amygdala and ANS

The Three Principles of Nervous System Healing

1. Safety first — the nervous system must perceive safety before it can process threat
2. Gradual, titrated exposure — small amounts of activation, discharged and integrated
3. Completion of responses — allowing the body to complete thwarted defensive actions

The Role of Co-Regulation

Humans are social mammals — our nervous systems are designed to co-regulate through connection:

• A calm, regulated person can help an activated person settle (this is the basis of therapeutic relationship)
• Eye contact, warm vocal tone, and facial expression all signal safety through the social engagement system
• This is why therapy is more effective than self-help for many trauma survivors
• It's also why community and relationship are essential for long-term recovery

What the Science Supports

• The neurobiology is well-established — ANS, amygdala, hippocampus, and prefrontal cortex changes in trauma are replicated across hundreds of studies
• The ACE study is robust — large sample, dose-response, replicated in multiple populations
• Body-based approaches are neurobiologically plausible — the neural pathways support bottom-up processing
• Physical manifestations are real — not psychosomatic in the dismissive sense

What Remains Uncertain

• Causal directionality — does ANS dysregulation cause the physical symptoms, or are they correlated?
• Individual variability — why do some people develop PTSD from a given event while others don't?
• Optimal treatment — which combination of approaches is most effective for which presentations?
• The epigenetic dimension — how trauma is transmitted across generations is an active area of research

11How Trauma is Stored in the Body

Overview

Trauma is not just something that happens in the mind — it lives in the body. Long after an overwhelming experience has passed, its effects linger in posture, muscle tension, breathing patterns, and even how we digest food or respond to touch. The body continues to operate as if the danger is still present, keeping us stuck in survival mode.

"The body keeps the score." — Bessel van der Kolk

The Nervous System: Survival on Loop

When we experience trauma, the body automatically engages a survival response: fight, flight, freeze, or fawn. These responses are driven by the autonomic nervous system and are meant to be temporary. When trauma is unresolved:

• Hyperarousal: Constantly on edge, anxious, unable to relax (sympathetic dominance)
• Hypo-arousal: Flat, numb, disconnected from the body (dorsal vagal dominance)

These survival patterns become chronic and shape not only how we feel but how we move and inhabit our bodies.

Muscular Armouring

Psychoanalyst Wilhelm Reich first described "muscular armour" — the body's way of defending against overwhelming feelings through chronic muscle tension. These patterns become fixed in posture and movement.

Alexander Lowen (building on Reich's work) identified how specific emotional conflicts manifest in bodily patterns:

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These patterns are not symbolic — they are physiological responses that shape how we experience the world.

Fascia: The Connective Tissue That Carries Memory

Fascia is the web-like connective tissue surrounding muscles and organs. It supports movement and transmits tension throughout the body. Emerging research suggests fascia matters in emotional memory:

• Trauma causes fascia to become dense, dehydrated, and constricted
• This contributes to stiffness, restricted movement, and chronic pain
• Certain physical movements or stretches can trigger strong emotional responses — evidence of fascial memory
• Unlike the brain (which stores memory temporally), fascia stores memory spatially
• Trauma, joy, grief, and shock all leave imprints — not as thoughts, but as tissue patterns

Therapies for Fascial Release

• Myofascial release
• Craniosacral therapy
• Trauma-informed bodywork
• Rolfing/structural integration
• Yin yoga (long-held stretches targeting fascia)

The Gut-Brain Connection

The gut contains its own nervous system — the enteric nervous system — communicating with the brain through the vagus nerve. This explains why we feel emotions in the stomach (butterflies, nausea, tightness).

Trauma disrupts this gut-brain communication. Survivors often experience: - Bloating - IBS (Irritable Bowel Syndrome) - Reflux - Chronic digestive issues (even when no physical cause is found) - SIBO (Small Intestinal Bacterial Overgrowth)

This is not just stress — it is the nervous system expressing unresolved threat.

Vagus Nerve Reset Practices

• Breathwork (slow diaphragmatic breathing)
• Cold exposure
• Chanting/humming/singing
• Gentle yoga
• Gargling

The Brain's Negativity Bias

Brains prioritize threat detection over safety recognition (a survival mechanism). For trauma survivors:

• 80-90% of safety/threat detection comes from internal organs via afferent motor neurons communicating through the vagus nerve
• The system may remain on high alert based on "outdated holding patterns in the body"
• Neutral stimuli register as dangerous (neuroception miscalibration)

Why Talking Is Not Enough

Many trauma survivors find that even after years of talk therapy, their bodies still feel tense, reactive, or shut down. This is because:

• Trauma is not only stored in declarative memory (the story)
• It is held in muscle, fascia, breath, and nervous system patterns
• Without engaging the body, these imprints remain stuck
• The body-based dimension of trauma is the "missing link" in many recovery journeys