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Brain Science of Trauma: How the Brain’s Defence Circuitry Responds to Threats


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Person looking out at the ocean with text and gold dots

The Mother Corp, Trauma-Informed Coaching and Consulting, is a holistic evidence-based service committed to destigmatizing trauma.  As such, it is useful to understand how the brain normally and naturally responds to threats and trespasses. 


When we understand how the brain’s defence circuitry functions, we can support people impacted by trauma or living with trauma with informed compassion. Knowing more about how our brains function and respond to trauma helps destigmatize trauma experiences.


How the Brain’s Defence Circuitry Responds to Threats


The Government of Canada has written a great document on the Neurobiological Impact of Trauma on the Brain which we will dive into here.


This federal document states,

"In the face of fear and threat, we react automatically. These reflexive reactions include the well-known fight, flight, or freeze responses. These responses register at two levels: conscious cognitive levels and unconscious physiological levels."

Neuroscience is improving understanding of this two-system framework.

As Ledoux and Pine (2016) explain,

"...one set of networks generates conscious feelings of fear and anxiety; a second set controls behavioural and physiological responses to threats...The second operates largely unconsciously because the network is subcortical."

In other words, in the second set, the response to threat come from deep in the brain and can be disconnected from conscious awareness or language.  This distinction is critical, as Ledoux and Pine (2016) highlight,

"...threats can present themselves below the threshold of consciousness and can thus trigger the defence circuitry without the person consciously recognizing feelings of fear."

Mobbs et al. (2009) describe,


"When any of our five senses detects a serious threat, the brain’s defence circuitry is activated, and a cascade of stress chemicals is released. When a threat to physical survival is imminent, the human brain, unless specifically trained to do otherwise, will switch to subcortical dominance and the defence responses of fight, flight, or freeze. The defence circuitry dominates brain functioning once activated."

Recognizing the Brain’s Natural Responses


Recognizing that these responses are automatic and deeply embedded in the brain’s survival mechanisms helps us understand trauma without bring our personal biases, judgment or stigma into our understanding of this prevalent experience and normal process. The brain is designed to prioritize survival, and when a threat is detected, it responds in ways that are not consciously controlled.



 

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Trauma-Informed Support and Destigmatization


Understanding the brain’s defence circuitry allows us to support those impacted by trauma with informed compassion and helps destigmatize trauma experiences. When we understand that these responses are part of a natural and automatic survival mechanism, we can move away from misconceptions. Trauma-informed perspectives foster compassion, create space for healing, and help build supportive environments that prioritize safety and stability.


For Individuals


As trauma-informed coaches and consultants, we provide personalized, confidential 1:1 support for individuals experiencing or living with trauma. Our services are available virtually and by phone for English speakers worldwide.


Our services are agile and responsive.

We are committed to ensuring people are meaningfully accompanied through hardship.


For one-on-one support, please get in touch for a free call:

📧 Secure email: themothercorp@proton.me



For Workplaces


Workplaces benefit from trauma-informed educational workshops that enhance organizational wellbeing, improve leadership effectiveness, and create psychologically safe environments. Our evidence-based training equips teams with the knowledge and tools to better support employees and clients. To bring trauma-informed education to your workplace, visit www.themothercorp.com/contact



 

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Chavisa in nature surrounded by gold dots

ABOUT THE AUTHOR


Chavisa Horemans, MES, CDC, CTRC


Chavisa Horemans is a trauma-informed consultant specializing in evidence-based, holistic support for individuals navigating complex challenges.


She holds an interdisciplinary Master’s degree in social sciences and a Graduate Diploma in adult education. Her areas of expertise include Gender-Based Violence, Hidden Abuse, Financial Abuse, and Post-Separation Abuse.


Chavisa is a Certified Divorce Coach (CDC, ICF), specializing in supporting parents involved in high-conflict disputes.


She is also a certified Trauma Recovery Practitioner (CTRC), helping individuals process and recover from trauma. She continues to deepen her knowledge through ongoing training in trauma-informed interventions.


For secure communication, she can be reached at themothercorp@proton.me.


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We are trauma-informed consultants for organizations and professionals seeking to create more empathetic and compassionate workplaces by leading through a trauma-informed lens.

We also provide trauma-informed coaching for individuals experiencing relationship breakdowns, high-conflict disputes, separation, divorce, gender-based violence, hidden abuse, financial abuse, and post-separation abuse. Our services help clients gain emotional, logistical, and practical support as they navigate complex challenges. We assist in strategic navigation, problem-solving, and informed decision-making to help clients move forward with clarity. We offer trauma recovery services, compassionately helping clients integrate, process, and transform trauma. Sessions are confidential, personalized, responsive, and one-on-one, available virtually or by phone.

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