Psychological trauma

The corpus's first clinical subject, and it arrives already contested.

The claim as van der Kolk states it

Overwhelming experience registers in the body and the nervous system, not only in memory. Arousal regulation, interoception and the sense of safety are altered, and they stay altered after the events have been narrated. Two things follow:

• Protection is relational. The attachment system and the surrounding social environment are what keep an experience from becoming a trauma-related disorder — which puts the childhood conditions before the event.
• Treatment should be somatic. If the injury is in the body, reach it there: EMDR, yoga, neurofeedback, theatre work. Talking is downgraded, and so, in effect, are the cognitive therapies.

The proposed diagnosis for the first point is developmental trauma disorder — chronic early adversity as its own category, distinct from PTSD after a discrete event.

Its formal status, sourced 2026-08-30 (dtd-field-trial-replication). DTD was proposed for DSM-5 and rejected, the subcommittee citing insufficient evidence for the diagnosis as submitted; it is not in ICD-11 either. What the WHO did adopt into ICD-11 is complex PTSD — the PTSD clusters plus disturbances of self-organization — which is not in DSM-5. So there are two rival framings for the same children, only one of them coded, and DTD is not it.

The research did not stop at the rejection. The DTD field trial replication (Ford, Spinazzola & van der Kolk 2021, 271 children in treatment across six US sites) finds DTD in 27% and PTSD in 39%, and reports the number that carries the argument: children meeting DTD without PTSD average 5.2 comorbid diagnoses against 3.8 for PTSD without DTD and 2.1 for neither. Three associations survive controlling for PTSD and every other disorder — oppositional defiant disorder, depression, separation anxiety — against one for PTSD.

Read against the section below, this cuts both ways and neither way is comfortable. It is real evidence, of a kind the somatic-treatment claims lack, that the childhood-adversity half of van der Kolk's account picks out something PTSD misses. It is also a replication run by the same three authors who proposed the diagnosis and wrote its interview — generalization across sites, not independence.

What is disputed

Not that trauma has physical correlates. The disputed parts are specific:

• Trauma-induced brain damage and the unique efficacy of body-based treatments — the 2025 BJPsych Bulletin audit of 122 claims found neither supported by current research.
• The demotion of CBT, which has trial evidence the somatic treatments largely lack.
• The implicit-memory account underneath it, which Richard McNally called a theory in search of a phenomenon back in 2003.

The shape of the idea

Strip the neuroscience and this is a claim the corpus already holds several versions of: something the person did not choose and cannot report is running the show. Freud put it in the unconscious, Jung in a shared layer beneath that, perceptual-learning in a pre-trained perceptual map, and van der Kolk in the body. The synthesis's founding thesis, one more time.

What makes it the sharpest case is the same thing that made it a bestseller: the location is physical, so it sounds testable. The 122-claim review is what happened when someone tested it.

Related

the-body-keeps-the-score · bessel-van-der-kolk · acceptance-and-commitment-therapy · existential-psychotherapy · replication-crisis · sigmund-freud · synthesis