Trauma and the Brain Code; When the Brain Continues to Detect Danger Even After the Event Has Ended

When a person is exposed to a threatening event, the brain processes information about what happened and the conditions in which it happened. During this process, learned associations may form between the danger and details that were present during the event, such as a place, a sound, a smell or a facial expression. This process is called fear conditioning (Fear Conditioning). For example, a person who experienced a car accident may develop a fear response when hearing screeching brakes, even if there is no danger around them.

The response does not require a conscious recollection of the accident. Sometimes a stimulus that recalls part of the experience is enough to trigger it.

Two central brain structures involved in emotional learning and memory are the amygdala and the hippocampus.

• The amygdala takes part in processing the emotional meaning of stimuli, in threat-related learning and in defensive responses.
• The hippocampus is involved in forming memories and in understanding the context in which an event occurred, including the place, time and circumstances.

Following trauma, some people may show changes in the functioning of the networks involved in these processes. As a result, a stimulus that recalls the event may trigger fear even when the current context is completely different.

It is important to emphasize that this is not necessarily permanent brain damage, and not everyone who experiences trauma shows the same changes.

Traumatic memories may be accompanied by intense sensory and emotional experiences. Some people experience intrusive memories, involuntary images or a sense of returning to the event. In certain situations a flashback occurs, in which the person feels as if the event is happening again, with varying degrees of disconnection from the present. At the same time, not every traumatic memory is fragmented or disorganized, and not everyone who experiences trauma suffers from flashbacks. The way memories are stored and retrieved is influenced by many factors, including the characteristics of the event, the emotional state and the circumstances of recall.

One of the processes that may occur after a threatening experience is called fear generalization (Fear Generalization).

This is a state in which a fear response learned in a particular context also appears in response to similar stimuli. For example, a person who was assaulted in a dark place may begin to fear not only the place where the event occurred, but also other dark streets. In some cases, the fear may gradually extend to further situations.

This process may explain why the world of a person coping with trauma sometimes becomes narrower, even when they are trying to avoid only situations that remind them of the event.

In some people, a traumatic experience may be followed by lasting changes in the reactivity of systems involved in stress. These changes can be expressed as heightened alertness, sleep disturbances, sensitivity to stimuli or difficulty calming down after a stressful event. Others may experience feelings of detachment, emotional numbness or reduced engagement with their surroundings. The responses are not uniform, and they may change over time.

It is important to distinguish between temporary stress reactions, which may appear after a difficult event, and post-traumatic stress disorder (PTSD), which is diagnosed according to defined clinical criteria.

One of the important processes in recovery from trauma is extinction learning (Extinction Learning). Despite its name, it does not mean erasing the original memory.

In this process, new learning takes place, through which the person discovers that stimuli once associated with danger are not necessarily dangerous in the present. For example, a person injured in a car accident may gradually learn, through tailored and safe experiences, to return to driving without every journey triggering a sense of extreme danger.

The new learning does not necessarily erase the earlier fear response, but it may reduce its influence.

Trauma therapy may include evidence-based interventions, such as trauma-focused cognitive behavioral therapy and EMDR.

Therapy is tailored to the nature of the difficulty, the level of distress and the person's individual needs. During therapy, it is possible to work on processing the traumatic memory, examining beliefs that developed following the event and reducing avoidance that limits functioning.

In suitable cases, the process helps the person develop a clearer distinction between the danger that existed in the past and the present reality.

It is not necessary to remember every detail of the event in order to benefit from therapy, and there is no place for uncontrolled exposure to traumatic memories without professional tailoring.

A traumatic experience may leave a lasting effect on the way a person interprets situations, responds to stimuli and experiences safety. At the same time, this effect is not necessarily permanent.

Through learning processes, new experiences and tailored therapy, it is sometimes possible to reduce the intensity of responses and improve functioning and quality of life.

Recovery from trauma does not require forgetting what happened. It may be expressed in the memory remaining part of one's life story without continuing to determine, with the same intensity, how the person feels and acts in the present.