Why Understanding Your Nervous System Changes Everything
Written by Emma Toms, The Confident Wellness Coach
Emma Toms is an Integrated Wellness Coach, IEMT Practitioner, Reiki Master Teacher, and Certified SSP Provider. Drawing on her own healing journey through autoimmune illness, she empowers clients to restore balance, build resilience, and reconnect with their true nature.
For many years, trauma was viewed primarily through the lens of psychology. It was something that happened in the mind, and therefore something that needed to be understood through thoughts, memories, and behaviours.
Today, neuroscience tells us a much bigger story. Trauma is not simply an event that happened in the past. It is an experience that can continue to shape the way the brain interprets the present.
This understanding has transformed the way we approach healing. Because when people begin to understand what trauma does to the brain, they often stop asking, "What's wrong with me?" and start asking, "What happened to me, and how has my nervous system adapted?" That perspective changes everything.
Trauma is not just the event
One of the biggest misconceptions about trauma is that it only refers to major life events. While experiences such as abuse, violence, accidents, or significant loss can certainly be traumatic, trauma can also develop through prolonged periods of stress, unpredictability, emotional neglect, criticism, or growing up in environments where safety felt uncertain.
Trauma is less about the event itself and more about how the nervous system experiences it. Two people can experience the same situation and respond very differently depending on their age, support systems, previous experiences, and biology.
The brain's primary responsibility is survival. When it perceives threat, it adapts accordingly. The problem is that these adaptations can remain long after the threat has passed.
The amygdala: The brain's alarm system
Deep within the brain sits a small structure called the amygdala. Its role is to detect potential danger and initiate survival responses.
When we encounter a genuine threat, the amygdala acts quickly, activating the fight, flight, freeze, or fawn response before the thinking part of the brain has fully processed what is happening.
This is incredibly useful when danger is present. However, chronic stress and trauma can cause the amygdala to become increasingly sensitive.
Research suggests that individuals exposed to prolonged stress often show heightened amygdala activation, meaning the brain becomes more vigilant and more likely to interpret situations as threatening.
This can show up as:
Anxiety
Hypervigilance
Difficulty relaxing
Irritability
Overthinking
Feeling constantly "on edge"
Being easily startled
Many people describe feeling as though they are always waiting for something bad to happen. Their nervous system has learned that vigilance equals safety.
The hippocampus: The brain's filing system
The hippocampus plays an important role in memory formation and contextualising experiences. It helps us distinguish between past and present.
Under chronic stress, elevated cortisol levels can affect hippocampal functioning. This means the brain may struggle to accurately file experiences away as completed events.
As a result, certain memories can continue to feel emotionally present rather than historically past. This is one reason why people sometimes say, "I know it's over, but my body still reacts as if it's happening." The thinking mind understands. The nervous system has not yet updated.
The prefrontal cortex: The wise decision maker
The prefrontal cortex is responsible for reasoning, planning, emotional regulation, decision making, and self awareness.
When we feel safe, this part of the brain is highly active. When survival responses take over, activity in the prefrontal cortex decreases. This explains why people often struggle to think clearly when stressed.
They may find themselves:
Reacting rather than responding
Struggling to concentrate
Forgetting things
Feeling emotionally overwhelmed
Making decisions they later question
It is not that they lack insight. It is that survival physiology temporarily overrides higher cognitive functioning. This is why healing rarely happens through insight alone.
Understanding something intellectually is valuable. But the nervous system also needs experiences of safety.
Why talking about trauma is not always enough
Traditional approaches to healing have often focused on understanding the story. While insight is important, neuroscience suggests that healing must also involve the body and nervous system.
Trauma is stored not only as narrative memory but as emotional, sensory, and physiological experiences. This is why many people say, "I've talked about it for years, but I still react the same way."
The conscious mind may understand. The survival brain may still be running an old programme. Approaches that work directly with nervous system regulation can help create the conditions for change.
This might include somatic practices, breathwork, mindfulness, safe and sound protocol (SSP), integral eye movement techniques (IEMT), yoga nidra, movement based approaches, and co-regulation through supportive relationships. The goal is not to erase the past but to help the brain recognise that the danger is no longer happening now.
The brain can change
One of the most hopeful discoveries in neuroscience is neuroplasticity. The brain is not fixed. It continues to adapt throughout life.
Just as repeated experiences of stress can strengthen survival pathways, repeated experiences of safety can strengthen regulation pathways.
Every time we pause before reacting, connect with someone we trust, notice sensations in the body, complete a breath practice, experience emotional safety, challenge an old belief, and the brain receives new information.
Small moments repeated consistently create lasting change. Healing is rarely one dramatic breakthrough. More often, it is the gradual process of teaching the nervous system that it no longer needs to carry yesterday's burdens into today.
Understanding creates compassion
Perhaps the greatest gift neuroscience offers is compassion. When people understand how trauma affects the brain, they often stop seeing themselves as broken.
Instead, they begin to recognise that many of their struggles were intelligent adaptations. The anxiety, people pleasing, perfectionism, hyper independence, need to stay busy, and inability to rest. These responses often developed for a reason.
The work is not about blaming the past. It is about understanding how the brain adapted and gently creating new experiences that support a different future. Because healing begins when we stop asking what is wrong with us and start becoming curious about how our nervous system learned to survive. From that place, real change becomes possible.
Read more from Emma Toms
Emma Toms, The Confident Wellness Coach
Emma Toms is an Integrated Wellness Coach, IEMT Practitioner, Reiki Master Teacher, and Certified SSP Provider. With more than 30 years of lived experience following an autoimmune diagnosis, she combines expertise in neuroscience, somatic practice, and energy work to deliver a comprehensive approach to wellness. Her background spans both healthcare and holistic settings, giving her a unique perspective on the intersection of science and spirituality. Having overcome her own challenges with Graves’ Disease and chronic stress, Emma now guides clients to restore balance, build resilience, and reconnect with their true nature.
