Can the Body Store Trauma?
Understanding Somatic Memory, Interoception & Nervous System Healing
For many years, healing was viewed almost entirely through a cognitive lens — focused on thoughts, behaviours, and conscious memories. But emerging research in neuroscience, trauma therapy, and mind-body medicine has highlighted something many ancient healing systems have long understood:
The body remembers.
Experiences are not only stored as stories in the mind. They are also encoded through the nervous system, muscles, hormones, posture, breath, emotional responses, and bodily sensations. This is where the concepts of somatic memory and interoception become incredibly important.
These two areas are transforming the way practitioners understand stress, trauma, emotional regulation, chronic illness, and healing.
What Is Somatic Memory?
Somatic memory refers to the idea that the body can retain the imprint of past experiences — particularly emotionally significant or traumatic events — even when the conscious mind may not fully recall them.
Rather than existing purely as narrative memories, these experiences can become embedded within physiological patterns such as:
Muscle tension
Breathing patterns
Startle responses
Posture
Emotional triggers
Chronic pain
Nervous system dysregulation
Digestive dysfunction
Hypervigilance or shutdown states
This does not necessarily mean the body stores “literal memories” in muscles in the way popular culture sometimes portrays. Rather, the nervous system learns and adapts through repeated experiences. Over time, these adaptations can become automatic survival patterns.
Researcher and psychiatrist Bessel van der Kolk helped bring widespread attention to this concept through his work on trauma and the body. His landmark paper The Body Keeps the Score proposed that traumatic experiences alter physiological stress responses and can continue to affect the body long after the event has passed. (Taylor & Francis Online)
Van der Kolk’s work explored how trauma may manifest through:
Chronic nervous system activation
Altered stress hormone patterns
Somatic symptoms
Emotional dysregulation
Dissociation
Heightened reactivity to sensory cues
This perspective shifted trauma research away from the idea that healing occurs solely through talking or conscious processing.
The Nervous System and Survival Responses
To understand somatic memory, it helps to understand how the nervous system responds to stress.
When we experience threat or overwhelm, the autonomic nervous system activates survival responses such as:
Fight
Flight
Freeze
Fawn
Ideally, after the threat has passed, the body returns to regulation.
However, if an experience is overwhelming, chronic, or unresolved, the nervous system may remain “stuck” in protective patterns. The body continues responding as though danger is still present, even when the conscious mind knows otherwise.
This is why people may say things like:
“I know I’m safe, but my body doesn’t feel safe.”
“I overreact before I can think.”
“My body tenses automatically.”
“I can’t switch off.”
“I feel numb or disconnected.”
These responses are often not conscious choices. They are physiological adaptations.
The Pioneers of Somatic Healing
Several researchers and clinicians have helped shape modern understanding of somatic memory and embodied healing.
Peter A. Levine
Peter Levine developed Somatic Experiencing®, a body-oriented approach to trauma healing based on the observation that animals naturally discharge survival energy after threat.
Levine proposed that trauma is not necessarily the event itself, but rather the unresolved physiological response that becomes trapped within the nervous system.
His work emphasises:
Interoception
Proprioception
Nervous system regulation
Titration (small, manageable processing)
Completing interrupted survival responses
A major paper by Levine and colleagues described Somatic Experiencing as working directly through interoceptive and bodily awareness to help regulate autonomic nervous system activation. (Frontiers)
Stephen Porges
Stephen Porges introduced Polyvagal Theory, which explores how the vagus nerve influences emotional safety, connection, stress responses, and survival states.
His work helped explain why:
The body can shift into shutdown or hyperarousal
Safety is physiological, not just psychological
Human connection helps regulate the nervous system
Trauma impacts social engagement and bodily regulation
Polyvagal Theory has become highly influential within somatic therapies, though aspects of the theory remain debated within scientific communities.
Candace Pert
Candace Pert’s research into neuropeptides helped bridge emotions and physiology. She explored how emotions are not isolated to the brain but involve biochemical signalling throughout the body.
Her work contributed to the understanding that emotional experiences have measurable physiological effects.
Antonio Damasio
Antonio Damasio’s work on embodied cognition demonstrated that bodily states play a central role in emotion, decision-making, and consciousness itself.
His research helped validate the idea that the body and brain are inseparable in emotional processing.
What Is Interoception?
Interoception is the ability to sense and interpret internal bodily signals.
It is often described as the body’s “inner awareness” system.
Interoception allows us to notice sensations such as:
Heartbeat
Hunger
Fullness
Breath
Temperature
Tension
Pain
Nausea
Emotional sensations
Gut feelings
Internal shifts in safety or stress
Research shows interoception plays a major role in:
Emotional regulation
Anxiety
Trauma responses
Decision-making
Self-awareness
Stress resilience
A review paper titled On the Origin of Interoception explains that interoception is deeply connected to emotion, health, self-awareness, and perception. (Frontiers)
In many people with chronic stress or trauma histories, interoception may become dysregulated.
Some individuals become hyper-aware of bodily sensations (often linked to anxiety or hypervigilance)
Others become disconnected or numb from bodily sensations (often linked to dissociation or shutdown)
Healing often involves gently rebuilding a safe relationship with the body.
Trauma, Interoception & the Body
Modern trauma research increasingly suggests that trauma is not only psychological — it is physiological.
A growing body of research indicates that trauma can disrupt:
Heart rate variability
Stress hormone regulation
Immune function
Emotional processing
Interoceptive awareness
Nervous system flexibility
One clinical trial examining mindfulness and PTSD found that improvements in interoceptive brain processing were associated with reductions in trauma symptoms. The study suggested that increasing awareness and regulation of internal bodily states may play a significant role in healing. (arXiv)
This aligns with what many body-based therapies aim to do:
Increase nervous system safety
Restore body awareness
Improve regulation
Support the body in completing unresolved stress responses
How Somatic Healing Approaches Work
Somatic therapies generally focus less on analysing the story and more on helping the body regain regulation and safety.
This may include:
Breath awareness
Tracking body sensations
Gentle movement
Grounding
Emotional regulation
Nervous system support
Orienting practices
Mindfulness
Body awareness techniques
The goal is not to force catharsis or relive trauma, but to help the nervous system gradually develop more flexibility, resilience, and capacity.
Why This Matters
Many people spend years trying to “think” their way out of symptoms that are deeply physiological.
Understanding somatic memory and interoception can help explain why symptoms may persist even when someone intellectually understands their patterns.
The body may still be carrying:
Protective responses
Stress chemistry
Survival conditioning
Nervous system dysregulation
Emotional tension patterns
This is why healing often requires more than cognitive insight alone.
True regulation involves the body learning safety again.
A Balanced Perspective
While somatic therapies are growing rapidly in popularity, it is important to approach the field with both openness and critical thinking.
Some concepts — particularly around “stored trauma” or “body memories” — remain debated within scientific literature. Researchers continue exploring exactly how traumatic experiences are encoded physiologically and neurologically.
However, there is strong and growing evidence supporting the role of the following in emotional and physical wellbeing:
Nervous system regulation
Interoception
Body awareness
Stress physiology
Mind-body integration
The future of healing is increasingly recognising what many people intuitively feel:
The mind and body are not separate systems.
They are deeply interconnected.
And healing often begins when we learn to listen to both.
References & Further Reading
van der Kolk, B. (1994). The Body Keeps the Score: Memory and the Evolving Psychobiology of Posttraumatic Stress. (Taylor & Francis Online)
Payne, P., Levine, P.A., & Crane-Godreau, M.A. (2015). Somatic Experiencing: Using Interoception and Proprioception as Core Elements of Trauma Therapy. (Frontiers)
Ceunen, E., Vlaeyen, J., & Van Diest, I. (2016). On the Origin of Interoception. (Frontiers)
Kang, S.S., et al. (2020). Interoception Underlies the Therapeutic Effects of Mindfulness Meditation for PTSD. (arXiv)
Recommended Books
The Body Keeps the Score
Waking the Tiger
In an Unspoken Voice
Healing Trauma