When Safety Doesn’t Feel Safe: Understanding the Brain’s Protective Response to Trauma
New research from McGill University offers an interesting perspective on why fear can persist long after a threatening experience has ended—and why our responses to trauma deserve understanding rather than judgment.
Have you ever reacted strongly to something that, logically, you knew wasn’t dangerous?
Perhaps someone’s tone of voice made you anxious. Maybe a disagreement left you feeling overwhelmed, or a seemingly ordinary situation brought on an unexpected sense of fear.
You might have found yourself wondering, Why am I reacting this way? I know I’m safe.
For people who have experienced trauma, this disconnect between what they know intellectually and what they feel emotionally can be confusing, frustrating, and sometimes accompanied by shame.
But what if these responses could be understood not as evidence that something is wrong with us, but as the expression of a protective system that has learned to be particularly attentive to danger?
Emerging research from McGill University offers an interesting perspective on this possibility.
Your Brain Is Trying to Protect You
Our brains are constantly interpreting information about the world around us.
One of their important functions is helping us recognize potential threats so we can respond to danger.
When we experience something frightening or overwhelming, our brains can form powerful associations between that experience and the circumstances surrounding it.
Sometimes, reminders of those circumstances can evoke fear even when the original danger is no longer present.
This might mean feeling uneasy around someone who reminds you of a person from your past, becoming anxious during conflict, or noticing physical tension in situations that other people seem to navigate comfortably.
These reactions can feel inconvenient or confusing, particularly when they don’t seem to reflect what is happening in the present.
But rather than immediately asking how to stop the response, it can be helpful to consider a different question:
What might this response be trying to protect me from?
This doesn’t mean every emotional reaction is caused by trauma, or that every fear response accurately identifies danger. It means that our reactions can have understandable histories, even when they no longer serve us in the same way.
What New Research Suggests About Fear and Safety
In October 2026, researchers from McGill University and the University of Toronto published findings exploring how the brain represents memories associated with danger and safety.
In experiments involving mice, researchers observed something unexpected.
Rather than becoming more distinct, the brain’s representations of safe and threatening environments became more similar when fear was involved.
The researchers suggested that this overlap might allow the brain to recognize potential threats more quickly.
From a survival perspective, responding quickly to something that might be dangerous can sometimes be more useful than taking additional time to determine whether a threat is actually present.
The researchers proposed that this process could help explain why certain trauma-related responses can feel so immediate.
Importantly, this was preclinical research involving mice, not a study of people receiving treatment for PTSD. Its implications for human trauma are still being explored.
Nevertheless, the research raises a meaningful possibility: some responses we experience as problematic may involve protective processes that have become especially sensitive to potential danger.
When Protection Becomes Exhausting
A response can be understandable and still be difficult to live with.
Someone who has experienced unpredictable conflict, for example, might become especially attentive to changes in another person’s mood.
Noticing subtle changes in someone’s voice or expression may once have helped them anticipate a difficult situation.
Later, that same attentiveness might make ordinary disagreements feel threatening, even in relationships where conflict can be navigated safely.
Similarly, someone who has experienced a frightening accident might feel anxious in situations that resemble the original event.
These examples do not mean the brain is making a conscious decision to overreact. Nor do they mean the person is choosing to remain afraid.
They illustrate how experiences can shape our expectations of safety.
And while these responses may have protective origins, they can also become exhausting when they interfere with relationships, daily activities, or our ability to feel at ease.
Understanding why a response developed does not mean we have to remain limited by it.
Moving Away From Self-Blame
One of the more difficult aspects of living with trauma-related responses can be the judgment we direct toward ourselves.
People may criticize themselves for being too sensitive, too anxious, too reactive, or unable to move on from experiences they believe should no longer affect them.
But shame rarely helps us understand what we’re experiencing.
A more compassionate approach begins by recognizing that emotional and physiological responses are influenced by learning, memory, context, and previous experiences.
Instead of viewing fear as a personal failure, we can become curious about the circumstances in which it developed.
This perspective does not dismiss the distress someone experiences or suggest that every response is helpful.
Rather, it creates room for two things to be true at once:
Your response may have developed for an understandable reason, and you may still want support in responding differently today.
How Therapy Can Help Us Experience Safety Differently
Trauma-informed psychotherapy can provide space to explore these responses without judgment.
An important part of this work may involve developing greater awareness of the situations, sensations, thoughts, and emotions that contribute to feeling threatened.
Over time, therapy can help individuals examine patterns shaped by earlier experiences and explore how those patterns relate to their present circumstances.
Depending on a person’s needs, treatment might involve processing traumatic memories, developing strategies for emotional regulation, or gradually approaching situations that have become associated with fear.
Evidence-based trauma therapies can also help reduce PTSD symptoms.
This work is not about forcing someone to ignore their instincts or convincing them that everything is safe.
Sometimes, fear is communicating something important about a person’s current circumstances.
Instead, therapy can support a more flexible relationship with these responses, including a greater ability to distinguish between past experiences and present conditions.
The goal is not to eliminate our capacity to recognize danger.
It is to help make room for experiences of safety, connection, and choice alongside that capacity.
You Are More Than Your Trauma Responses
Perhaps one of the most helpful ways to understand trauma recovery is to recognize that our responses are not reflections of our worth, strength, or character.
Feeling anxious does not mean someone is weak. Becoming overwhelmed does not mean someone has failed. And having difficulty feeling safe does not mean that safety will always feel out of reach.
Our experiences can shape the ways we respond to the world, but those responses are not the entirety of who we are.
The emerging research from McGill offers one possible scientific perspective on why the brain may prioritize protection even when the present situation does not require it.
From a therapeutic perspective, this invites us to approach our reactions with greater curiosity and compassion.
Rather than asking, What’s wrong with me?, we might begin asking:
What have I learned about safety, and what might help me experience it differently now?
Trauma-Informed Therapy at Judy’s Toronto Therapy
At Judy’s Toronto Therapy, we believe that understanding the context of someone’s experiences is an important part of meaningful therapeutic work.
Our therapists offer individualized, trauma-informed psychotherapy, drawing on approaches such as Eye Movement Desensitization and Reprocessing (EMDR) and Internal Family Systems (IFS), depending on each client’s needs and the therapist’s training.
IFS offers a particularly compassionate framework for understanding protective responses, encouraging curiosity toward the different parts of ourselves rather than approaching difficult emotions or behaviours with judgment.
Whether you’re navigating trauma-related anxiety, difficulties in relationships, or emotional responses that feel hard to understand, therapy can provide a supportive space to explore your experiences with curiosity rather than judgment.
We offer in-person psychotherapy in Toronto and virtual sessions.
Learn more about therapy at Judy’s Toronto Therapy.
References
McGill University. (2026, October 20). Survival mechanism in the brain may help explain PTSD. McGill Health e-News.
https://healthenews.mcgill.ca/survival-mechanism-in-the-brain-may-help-explain-ptsd
Rozeske, R., & Brandon, M. (2026). Overlapping representations in the ventral hippocampus support rapid fear memory retrieval. Nature Neuroscience.
https://www.nature.com/articles/s41593-026-02435-5
This article is intended for educational purposes and does not replace individualized psychological or medical assessment.