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How Complex Trauma Changes Your Brain

3/6/2023

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Complex trauma refers to the psychological and emotional harm caused by repeated, chronic, or prolonged exposure to traumatic stress. For example, exposure to domestic violence, chronic bullying, systemic oppression, neglect, abuse, war, conflict, or forced displacement can all cause complex trauma. The damage caused by complex trauma runs deeper than emotional and psychological experience, it structurally and physiologically changes the brain too. 

During periods of any kind of traumatic stress, the body's natural stress response system becomes activated, resulting in the production of stress hormones, like cortisol and adrenaline. While this stress response helps to mobilize the body in short bursts as a means of survival, prolonged exposure to stress hormones in the body can cause harmful changes in the brain's development, structure, and function. For example, this can result in changes of the size and function of certain brain regions, and change the connectivity between different areas of the brain
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Research indicates that the amygdala, prefrontal cortex,  hippocampus, and dopamine production systems are among some of the brain structures and systems affected by complex trauma. ​
These neural structures and neurotransmitters are responsible for important functions such as emotional regulation, stress response, social cognition, decision-making, memory processing and learning, motivation and reward, and disruptions to the brain's natural attachment system.

The kinds of changes common to these areas of the brain due to complex trauma are associated with changes in functioning, experiences, and behaviours. For example, behavioural and experiential changes include:
  • hyperactivity in responsiveness to stress and trauma,
  • increased reactivity and fear responses, hypoactive (reduced) emotion regulation and decision-making, resulting in increased difficulties in regulating emotions and behaviours,
  • impaired memory function, and learning challenges
  • increased difficulties in forming healthy and secure attachments. ​
​Changes in the brain's reward system can also result in an increased likelihood to engage in high risk behaviours, like substance use or self-harm, as a way of trying to regulate emotions and access a feeling of reward. ​
​Exposure to complex trauma can have profound impacts on brain development, leading to long lasting changes that can affect daily life, relationships, social and cognitive functioning, and overall mental health, and wellbeing. ​
Understanding the ways that complex trauma can impact brain development, daily functioning, and individual experiences, is crucial to developing effective treatments for folks who have experienced complex trauma. ​While complex trauma causes significant changes to brain development, treatment can help rewire the brain and dramatically improve daily functioning and quality of life.

​Working with a mental health professional who is knowledgeable and experienced in assessing and treating complex trauma is important for recovery. Contact us to learn more about how we can help you or a loved one in your recovery journey.

References

  1. Brewin, C. R., Gregory, J. D., Lipton, M., & Burgess, N. (2010). Intrusive images in psychological disorders: Characteristics, neural mechanisms, and treatment implications. Psychological Review, 117(1), 210-232. doi: 10.1037/a0018113
  2. Teicher, M. H., & Samson, J. A. (2013). Childhood maltreatment and psychopathology: A case for ecophenotypic variants as clinically and neurobiologically distinct subtypes. American Journal of Psychiatry, 170(10), 1114-1133. doi: 10.1176/appi.ajp.2013.12070957
  3. van der Kolk, B. A., Roth, S., Pelcovitz, D., Sunday, S., & Spinazzola, J. (2005). Disorders of extreme stress: The empirical foundation of a complex adaptation to trauma. Journal of Traumatic Stress, 18(5), 389-399. doi: 10.1002/jts.20047

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  • Home
    • Community Resources >
      • Alberta Resources
      • B.C. Resources
    • Land Acknowledgement
    • Deep Sea Resources >
      • Free Downloads
      • Updates
      • Blog
  • About
    • Meet The Team >
      • Dr. Natashya Sherbot-Stronach, Ph.D., R.Psych. (ab)
      • Tammy Auten-Dye, M.Ed., R.Psych. (ab)
      • Dr. Prabh Parmar, Psy.D., R.Psych. (ab)
      • Lorelei Hoyt, MA, R.Psych. (ab)
      • Adam Elkestawi, MA, Provisional Psychologist (ab)
      • Andra Gramescu, MA, CCC, Provisional Psychologist (ab)
      • Silvia Eleftheriou, MEd, R.Psych. (ab, bc)
    • Areas of Expertise >
      • Anxiety Disorders
      • Depression Disorders
      • Trauma and Stress Disorders
      • ADHD
      • Borderline (BPD)
      • Narcissistic Abuse
      • Parenting Support
    • Fees for Services >
      • Alberta Fees for Services
      • B.C. Fees for Services
  • Services
    • Counselling >
      • Adult Counselling
      • Couples & Family Counselling
      • Teen Counselling
      • Child Counselling
      • Indigenous Mental Health
    • Assessment
    • Group
  • Connect
    • Client Portal
  • Book Now