In brief: what is important to understand
- A strong response to a reminder of the past does not by itself mean that a person has PTSD.
- Memory, learning, attention, and physiological responses interact.
- A cue that was once associated with danger can sometimes trigger a response even when the present situation is safe.
- Context helps the nervous system distinguish between a signal that currently indicates danger and one that no longer does.
- The phrase “the body remembers” can be useful as a metaphor, but it should not be interpreted as memories being literally stored in body tissues.
Sometimes a person clearly understands that a dangerous event is over, yet their response seems to suggest otherwise.
A sudden sound may cause a rapid heartbeat. A particular smell may unexpectedly bring back tension. In a familiar situation, someone may freeze, feel an urge to leave, or experience anxiety even when there is no objective threat.
Such responses do not automatically indicate a psychological disorder. A wide range of emotional and physiological reactions can occur after frightening or overwhelming events, and for many people these reactions gradually decrease.
Post traumatic stress disorder, or PTSD, is a more specific clinical condition. Diagnosis depends on a defined combination of symptoms, their duration, and their impact on everyday functioning.
When the danger is over but the response still appears
During a threat, the body must quickly prepare for action. Attention may become more focused on possible danger, while heart rate, breathing, muscle tension, and other physiological processes can change.
After an event, some cues that were associated with danger may remain significant for memory and threat detection systems.
As a result, a person may experience not only a conscious memory, but also an automatic emotional or physiological response.
“I know that I am safe now, but my reaction can occur before I have time to explain that to myself.”
A trigger does not always look like a memory
A reminder of the past can be obvious. It may be a photograph, a place, a conversation, or a particular person.
Sometimes the connection is much less visible. A tone of voice, a smell, a facial expression, a movement, music, or a particular type of situation may become associated with a response.
The National Center for PTSD describes emotional distress and physical reactivity after exposure to trauma related reminders as possible features of PTSD. However, an individual reaction is not enough to establish a diagnosis.
In this article, the word “trigger” is used in a broad educational sense to describe a cue or situation that reminds a person of previous experience and may be associated with a reaction.
Why context matters
For an adaptive response, recognizing a familiar cue is not enough. The nervous system also needs information about the current context.
Something that was genuinely associated with danger in the past may now occur under completely different circumstances.
Experimental PTSD research suggests that some individuals may have difficulty using contextual information to regulate previously learned fear responses.
In research by Sarah Garfinkel and colleagues, participants with PTSD showed less effective use of safe contextual information when regulating a previously learned fear response.
For this reason, it is more accurate to avoid saying that “the brain thinks the trauma is happening again.”
A more precise explanation is that some individuals may have greater difficulty using present context to regulate reactions to cues that were previously associated with threat.
What is fear extinction?
If a particular cue repeatedly appears together with danger, a learned response can develop.
If the same cue later appears repeatedly without the dangerous event, new learning may occur. The nervous system begins to learn that the cue does not predict the same threat under the new conditions.
Researchers call this process fear extinction.
Importantly, new learning does not necessarily erase the original association. Context and the later retrieval of safety information remain important.
In research by Mohammed Milad and colleagues, participants with PTSD showed differences in the later recall of extinction learning. The researchers also reported differences in activity across several brain regions involved in fear processing, context, and regulation.
These findings help explain possible PTSD mechanisms, but they do not mean that one mechanism explains every person’s response after a difficult experience.
Fight, flight, or freeze: useful language, but not the whole picture
The terms fight, flight, and freeze are often used to explain automatic protective responses in simple language.
This framework can be useful educationally, but human responses to threat are considerably more complex.
They can include heightened vigilance, avoidance, sleep changes, difficulty concentrating, an increased startle response, irritability, emotional numbing, and other experiences.
For this reason, not every human response should be interpreted only through fight, flight, or freeze.
Where does the body fit into this?
The brain continuously receives information about the internal state of the body.
This includes signals related to heart rate, breathing, muscle tension, and many other physiological processes.
The perception and processing of internal bodily signals is associated with the concept of interoception.
This helps explain why psychological experience cannot be separated completely from physiology.
A scientific approach does not require us to choose between “the brain” and “the body.” Memory, attention, emotion, and physiological responses operate within interconnected systems.
What does “the body keeps the score” mean?
Bessel van der Kolk’s book The Body Keeps the Score helped popularize the idea that difficult experiences can be associated with memory, emotional responses, and bodily states.
Van der Kolk emphasizes that the consequences of overwhelming experiences may be reflected not only in the story a person can consciously tell, but also in reactions, sensations, arousal, and the experience of safety.
For scientifically precise communication, however, the book title should not be treated as a literal neurobiological formula.
The body is not a separate storage system for memories.
A more precise explanation involves the interaction of memory, learning, attention, threat evaluation, context, and physiological regulation.
A strong reaction does not necessarily mean PTSD
This distinction is essential.
After a frightening or overwhelming event, a person may experience anxiety, sleep disruption, unpleasant memories, or reactions to certain reminders without having PTSD.
The National Institute of Mental Health notes that many people experience reactions after traumatic events and gradually recover over time.
A PTSD diagnosis requires a specific pattern of symptoms, a duration of more than one month, and clinically meaningful impairment.
A single bodily sensation, anxiety response, or difficult memory cannot be used to diagnose PTSD or another mental health condition.
What can this understanding change in practice?
There is an important difference between asking:
“What is wrong with me?” and “What might my nervous system have learned from an earlier experience, and why is this response appearing now?”
The second question does not diagnose anything, and it does not explain every difficulty through trauma.
It can, however, help us consider some responses through the processes of learning, memory, and adaptation, rather than seeing them only as conscious choices.
A person may understand a situation rationally while still experiencing an emotional or physiological response that appears before conscious analysis.
What hypnosis professionals should understand
For professionals studying hypnosis, it is especially important to understand the interaction of attention, expectations, emotional responses, memory, and bodily sensations.
Professional training in consulting hypnosis is not the same as training to diagnose or treat PTSD.
Practitioners must work within their qualifications, professional role, and applicable law.
NGH Consulting Hypnotist Training
For professionals who want to systematically study hypnosis, trance, suggestion, and appropriate professional boundaries, Chicago Institute of Hypnosis and Coaching offers training for consulting hypnotists based on National Guild of Hypnotists standards.
Explore the NGH ProgramWhen professional support may be appropriate
If reactions after a difficult event continue over time, become intense, or significantly interfere with sleep, relationships, work, or everyday functioning, it may be appropriate to discuss them with a qualified mental health professional.
PTSD diagnosis requires assessment of the complete pattern of symptoms and cannot be based on one sensation, memory, or reaction alone.
Bessel van der Kolk
The Body Keeps the Score played an important role in popularizing discussion of psychological trauma, memory, emotional responses, and bodily experience.
We use the book as an important educational context, while scientific claims in this article are evaluated separately against research literature and authoritative clinical sources.
A link to our independent book review will be added here when the Books and Reading section is published.