The phrase “the body keeps the score” captures a specific scientific observation: traumatic experiences change not just how you think and feel, but how your body functions at a biological level. The idea, popularized by psychiatrist Bessel van der Kolk in his bestselling book, draws on decades of research showing that trauma alters brain structure, disrupts the autonomic nervous system, reshapes the stress response, and can contribute to chronic physical illness years after the original event. A 2025 survey of American adults found that roughly three in four people endorse the idea that the body keeps the score, making it one of the most widely accepted psychological concepts in popular culture. But the science behind the phrase is more textured, and sometimes less settled, than the slogan suggests.
Where the Phrase Comes From
Van der Kolk first used “the body keeps the score” as the title of a 1994 paper in the Harvard Review of Psychiatry, years before it became a book title. That paper laid out the core argument: trauma gets stored in what researchers call somatic memory and shows up as changes in the biological stress response. When ordinary memory fails to process a terrifying experience into a coherent narrative, the trauma gets organized at a sensory level instead, as intrusive images, physical sensations, and heightened startle responses that resist change through talk alone.1PubMed. The body keeps the score: memory and the evolving psychobiology of posttraumatic stress The inability to file the experience away as “something that happened in the past” means the body keeps reacting as though the danger is still present. That is the score the body keeps: a running tally of unresolved threat, expressed through physiology rather than words.
How Trauma Reshapes the Brain
Neuroimaging studies consistently identify three brain regions that look and behave differently in people with PTSD. The amygdala, which flags incoming information as dangerous, becomes hyperactive. The medial prefrontal cortex, which normally helps put the brakes on fear responses, shrinks in volume and becomes less responsive. And the hippocampus, which helps contextualize memories in time and place, shows reduced volume and diminished functional integrity.2PubMed. Amygdala, medial prefrontal cortex, and hippocampal function in PTSD A narrative review of MRI studies confirmed these patterns, finding reduced volumes in the hippocampus, left amygdala, and anterior cingulate cortex compared to controls.3PubMed Central. Neuroimaging in post-traumatic stress disorder: a narrative review
What makes these findings clinically meaningful is that they track with how bad symptoms are. Amygdala responsivity is positively associated with PTSD symptom severity: the more reactive the amygdala, the worse the flashbacks, hypervigilance, and emotional flooding. Medial prefrontal cortex activity shows the opposite pattern, where lower activity in this region corresponds to more severe symptoms.2PubMed. Amygdala, medial prefrontal cortex, and hippocampal function in PTSD In practical terms, this means the brain’s alarm system is stuck on high alert while its ability to say “false alarm” is weakened. That neurological imbalance is one concrete mechanism behind what van der Kolk’s phrase describes.
This pattern appears in children too, and may be even more consequential during development. Research on pediatric PTSD shows declining hippocampal volume, increasing amygdala reactivity, and weakening connections between the amygdala and the prefrontal cortex as affected children age, a developmental trajectory that diverges from typically developing youth.4PubMed Central. Trauma, PTSD, and the Developing Brain The developing brain is particularly sensitive to these disruptions, which is part of why early childhood trauma can have such lasting effects on emotional regulation.
The Autonomic Nervous System Gets Stuck
The brain changes are only part of the story. Trauma also disrupts the autonomic nervous system, the body’s unconscious control panel for heart rate, breathing, digestion, and arousal. One of the clearest markers of this disruption is heart rate variability, the slight fluctuation in time between heartbeats. In a healthy person at rest, HRV is relatively high, reflecting a flexible nervous system that can shift smoothly between alert and calm states. In PTSD, that flexibility is reduced.
A meta-analysis published in Psychological Medicine found that people with PTSD show lower parasympathetic activity at rest, meaning the calming branch of the nervous system is underperforming. They also showed diminished total heart rate variability and a higher resting heart rate compared to controls. During stress, the pattern held: higher heart rate and lower parasympathetic tone.5PubMed Central. Autonomic dysfunction in posttraumatic stress disorder indexed by heart rate variability: a meta-analysis A second meta-analysis reached similar conclusions and went further, suggesting that reduced HRV could be viewed as an endophenotype of PTSD, a measurable biological trait tied to the disorder’s underlying mechanisms, with connections to inflammation, brain function, and difficulty regulating emotions.6PubMed Central. Posttraumatic Stress Disorder and Alterations in Resting Heart Rate Variability: A Systematic Review and Meta-Analysis
What this means in everyday terms is that people living with unresolved trauma often have nervous systems that are running hot at baseline. Their bodies behave as though threat is constant even in safe environments. This manifests as difficulty sleeping, an exaggerated startle response, tension that does not ease with rest, and a gut feeling of danger that has no identifiable cause. One study found that PTSD symptoms were significantly tied to dysregulation of the parasympathetic nervous system, which both signals and predicts cardiovascular risk over time.7PubMed Central. Posttraumatic Stress, Heart-Rate Variability, and the Mediating Role of Behavioral Health Risks The score the body keeps, in other words, is not just psychological distress. It includes measurable wear on the cardiovascular system.
When the Body Remembers What the Mind Cannot
A distinctive feature of traumatic memory is that it tends to be fragmented and sensory rather than narrative. You might not recall the details of a car accident in chronological order, but a certain smell or sound can throw you back into the moment with full physiological force. Van der Kolk’s original paper described this as a failure of declarative memory leading to the organization of trauma at a somatosensory level, as visual images or physical sensations that are relatively resistant to change.1PubMed. The body keeps the score: memory and the evolving psychobiology of posttraumatic stress
Neuroimaging research has started to map how this works in the brain. A study using functional brain imaging found that implicit retrieval of traumatic memory, the kind that gets triggered automatically rather than deliberately recalled, involved different brain regions than explicit retrieval. Implicit recall specifically activated the retrosplenial cortex and anterior cingulate cortex. And critically, brain activity measured shortly after a traumatic event predicted who would later develop intrusive memories, with independent contributions from regions tied to both implicit and explicit retrieval pathways.8PubMed Central. Neural correlates of experimental trauma memory retrieval This is the neuroscience behind a familiar experience: a flashback feels less like remembering and more like reliving, precisely because it activates sensory and emotional circuits rather than the narrative memory system.
Trauma’s Footprint on Physical Health
Perhaps the most striking evidence that the body keeps the score comes from research linking childhood adversity to physical disease decades later. The Adverse Childhood Experiences research program, which began in the late 1990s, tracked the connection between early-life trauma and adult health outcomes. One landmark study found that people with two or more adverse childhood experiences had a 70 percent increased risk of hospitalization for certain autoimmune diseases, an 80 percent increased risk for another category, and double the risk for rheumatic diseases, compared to people with no such experiences.9PubMed Central. Cumulative Childhood Stress and Autoimmune Diseases in Adults
A more recent meta-analysis of 27 studies involving more than three million participants confirmed the association, finding a statistically significant link between childhood adversity and autoimmune disease in adulthood.10PubMed. Childhood adversity as a risk factor for autoimmune disease: A systematic review and meta-analysis with implications for psychiatry A study of two large cohorts of adult women added detail, showing that each additional adverse childhood experience increased the prevalence of autoimmune disease by about 10 percent, with the strongest links for conditions like Sjögren’s syndrome, polymyalgia rheumatica, and rheumatoid arthritis. Roughly one quarter of the association was mediated through depression, anxiety, and PTSD, suggesting that psychological distress is one pathway but not the only one connecting early trauma to later autoimmune problems.11PubMed Central. Adverse childhood experiences, mental distress, and autoimmune disease in adult women: findings from two large cohort studies
The biological mechanism likely involves epigenetic changes, modifications to how genes are expressed without altering the DNA sequence itself. Childhood trauma has been associated with altered methylation patterns in genes involved in the stress response, particularly those governing the hypothalamic-pituitary-adrenal axis, the body’s central stress management system. These modifications may help explain why early adversity can raise the risk for conditions as varied as PTSD, depression, diabetes, and cardiovascular disease.12PubMed Central. Epigenetic Modifications in Stress Response Genes Associated With Childhood Trauma The body is literally keeping the score at a molecular level.
Chronic Pain and Central Sensitization
Chronic pain is another domain where the body-keeps-the-score concept plays out with striking clarity. Trauma exposure and PTSD symptoms are significantly associated with clinical markers of central sensitization, a state in which the nervous system amplifies pain signals. In chronic pain patients, trauma history correlates with more widespread pain, greater pain intensity, and more somatic symptoms, and PTSD symptoms partially explain this relationship.13PubMed Central. Posttraumatic Stress Symptoms Mediate the Effects of Trauma Exposure on Clinical Indicators of Central Sensitization in Patients with Chronic Pain
A study at a German university pain clinic quantified these differences. Chronic pain patients who also had PTSD showed substantially worse outcomes across the board compared to pain patients without trauma history: larger areas of pain, greater sleep impairment, higher disability scores, and markedly higher levels of stress, anxiety, depression, and somatization.14PubMed Central. Traumatic Events, Posttraumatic Stress Disorder, and Central Sensitization in Chronic Pain Patients of a German University Outpatient Pain Clinic When people say their body holds their trauma, the pain research suggests this is not purely metaphorical. The nervous system can become recalibrated to process ordinary sensory input as threatening, turning up the volume on pain signals in a way that persists long after the original injury or trauma has ended.
Dissociation and the Body Going Offline
Not everyone responds to trauma with hyperarousal. Some people experience the opposite: their body goes numb, their sense of self feels distant, and they disconnect from physical sensations. This is dissociation, and it represents another way the body keeps the score. Rather than a nervous system stuck on “fight or flight,” dissociation reflects a system that has shut down emotional and sensory processing as a protective measure.
Research on functional neurological disorder, where patients develop seizures, paralysis, or other neurological symptoms without a structural brain lesion, has found strong ties to dissociation. One systematic review and meta-analysis found changes in brain volume and functional connectivity in regions including the anterior cingulate cortex, and proposed that increased neural activity in these areas could serve as a potential biomarker for pathological dissociation.15PubMed Central. Dissociation and its biological and clinical associations in functional neurological disorder: systematic review and meta-analysis In functional seizures specifically, overmodulation of the amygdala has been proposed as a mechanism explaining dissociative episodes.16Psychiatry Research Communications. Functional/dissociative seizures: Review of its relationship with trauma, dissociation and the neurobiological underpinnings The body keeps the score in both directions: either by staying hypervigilant or by shutting down entirely.
Where the Science Gets Oversimplified
The phrase “the body keeps the score” has entered popular culture as a kind of all-purpose explanation for somatic symptoms after trauma, and that popularity has created some misunderstandings worth correcting.
The biggest involves polyvagal theory, which has become deeply intertwined with how many therapists and self-help authors discuss the body’s trauma response. Polyvagal theory proposes a hierarchical model of the autonomic nervous system with three distinct circuits tied to social engagement, fight-or-flight, and shutdown behaviors. It is enormously influential in trauma therapy circles. But the scientific foundation has been challenged in increasingly forceful terms. A 2023 paper laid out how each of the theory’s five basic premises has been shown to be either untenable or highly implausible based on available evidence.17PubMed. Fundamental challenges and likely refutations of the five basic premises of the polyvagal theory In 2025, a group of 38 leading experts in vagal physiology and vertebrate evolution co-authored a paper concluding that the theory is “untenable” because its major tenets are not supported by current neurophysiological and evolutionary evidence.18PubMed Central. Why The Polyvagal Theory Is Untenable: An international expert evaluation of the polyvagal theory and commentary upon Porges, S.W. (2025)
This does not mean the body’s autonomic response to trauma is fictional. The HRV findings described earlier, for instance, do not depend on polyvagal theory at all. It means that one popular framework used to explain those responses has serious problems. For readers who have encountered polyvagal language in therapy or books, the takeaway is not that the body does not respond to trauma, clearly it does, but that the specific three-tier model often used to describe those responses rests on shaky ground. The autonomic dysregulation is real; the particular theory layered on top of it is contested.
A related misunderstanding involves the idea that the body stores discrete memories in specific muscles or organs. While there is good evidence that trauma lives in the nervous system and alters physiology, the claim that a hip flexor “holds” a childhood memory in the way a hard drive holds a file goes well beyond what research supports. The concept of interoceptive awareness, your ability to sense what is going on inside your own body, is relevant here. A scoping review of 43 studies found that the primary function of interoceptive awareness in trauma contexts was its role in emotion regulation, how well you can notice and manage your internal states.19PubMed Central. A roadmap to understanding interoceptive awareness and post-traumatic stress disorder: a scoping review That is different from the claim that specific traumas are archived in specific body parts.
What “Body-Based” Therapies Actually Show
Van der Kolk’s work has fueled enormous interest in body-oriented therapies, approaches that go beyond traditional talk therapy to address the physical dimensions of trauma. Somatic Experiencing, one of the best-known, focuses on tracking and releasing bodily sensations associated with traumatic stress. A randomized controlled trial found significant reductions in PTSD symptom severity and depression following SE treatment, with large effect sizes that held at follow-up.20PubMed Central. Somatic Experiencing for Posttraumatic Stress Disorder: A Randomized Controlled Outcome Study A broader scoping review found preliminary evidence for positive effects on PTSD-related symptoms, affect, and somatic symptoms, though it flagged that overall study quality was mixed.21PubMed Central. Somatic experiencing – effectiveness and key factors of a body-oriented trauma therapy: a scoping literature review
EMDR, or Eye Movement Desensitization and Reprocessing, takes a different approach but shares the premise that trauma needs to be processed through more than verbal narrative. A systematic review of 87 EMDR studies organized the proposed mechanisms into psychological, physiological, and neurobiological categories, with the working memory hypothesis considered one of the leading explanations for how the therapy produces change.22PubMed Central. How Does Eye Movement Desensitization and Reprocessing Therapy Work? A Systematic Review on Suggested Mechanisms of Action One particularly interesting finding came from a study of breast cancer patients with PTSD, which found that successful EMDR therapy restored the flow of information from the autonomic nervous system to the brain, a bottom-up communication pathway that had been disrupted by the trauma.23PubMed. Restoring bottom-up communication in brain-heart interplay after trauma-focused psychotherapy in breast cancer patients with post-traumatic stress disorder That finding is a neat demonstration of the body-keeps-the-score concept in reverse: effective treatment does not just change how you think about the trauma, it changes how your heart and brain talk to each other.
The honest assessment is that body-oriented therapies show real promise but still sit at an earlier stage of evidence than established treatments like trauma-focused cognitive behavioral therapy or prolonged exposure. The effect sizes in individual trials are encouraging, but the evidence base needs larger, higher-quality studies to match the level of confidence clinicians have in first-line approaches.
Cultural Differences in How the Body Speaks
One dimension often missing from discussions of the body keeping the score is how culture shapes the way physical symptoms of distress are noticed, reported, and interpreted. A review of cross-cultural research on somatic awareness found what it called a “startling paradox”: non-Western cultures consistently show heightened somatic focus and awareness, attending more to bodily sensations in everyday life and in expressions of distress, yet they also show less accuracy on laboratory tests of interoception, like counting heartbeats.24PubMed Central. Cross-cultural differences in somatic awareness and interoceptive accuracy: a review of the literature and directions for future research The implication is that “the body keeps the score” might be expressed very differently depending on cultural context. In some settings, post-traumatic distress presents primarily through physical complaints like headaches, stomach pain, or fatigue rather than through the psychological symptoms Western diagnostic frameworks prioritize. The body is keeping the score either way, but the language it uses varies.
This matters practically because someone whose trauma manifests primarily as chronic unexplained physical symptoms may not get connected to trauma-informed care if their clinician is only screening for psychological distress. The body-keeps-the-score framework, taken seriously, argues for a broader view of what trauma looks like in a clinical encounter.
The Gap Between Metaphor and Mechanism
The enduring appeal of “the body keeps the score” is that it names something many trauma survivors already sense: that their body is carrying something their conscious mind cannot fully access or control. The evidence reviewed here suggests this intuition has real biological grounding, in altered brain circuits, disrupted autonomic function, epigenetic changes, increased disease risk, and amplified pain processing. At the same time, the phrase has become so popular that it sometimes gets stretched into claims the science does not support, from the idea that muscles store specific memories to the adoption of contested theoretical frameworks as established fact. A 2025 nationally representative survey found that 94 percent of American adults believe in repressed memory, a concept the memory science community has long viewed with skepticism, and the popularity of the body-keeps-the-score framework may reinforce some of those beliefs. The same survey found that about 4 percent of respondents reported recovering memories that had previously been entirely unknown to them.25Taylor & Francis Online / PubMed Central. Repressed memories and the body keeps the score: public perceptions and prevalence
Distinguishing the well-supported core from the speculative extensions is not just an academic exercise. People making decisions about their own treatment deserve to know which parts of the framework rest on solid evidence and which are attractive ideas still waiting for rigorous confirmation. The body does keep the score. The question is always what, precisely, you are reading from that score, and whether the interpretation you have been offered is grounded in the best available science.