How Chronic Stress Rewires Your Brain and What to Do About It
Stress responses are the body’s finely tuned, intelligent ways of facing and overcoming difficulties. But chronic stress is harmful to both mental and physical health.
When 14-year-old Elizabeth Smart was kidnapped from her bedroom in 2002, it made headline news across the nation and around the world. During her captivity, the young teen was repeatedly raped, chained up, and forced to follow her kidnappers’ every command. When Elizabeth was finally rescued nine months later, most people wondered if she could ever have a normal life.
Many people believe that everyone who endures a severe traumatic experience will develop posttraumatic stress disorder (PTSD). But that’s not true. Research shows that in some people, trauma ultimately leads to posttraumatic growth (PTG)—positive changes in a person’s life.
That’s what happened to Elizabeth, as she reveals on the Change Your Brain Every Day podcast hosted by Dr. Daniel Amen.
“It was the worst nine months of my life,” recalls Elizabeth. “But once I was rescued, I didn’t want to lose the rest of my life to what had happened the last nine months.”
Elizabeth Smart
How can some people find hope in the aftermath of trauma? “There are certain decisions you make that either increase the likelihood of trauma or decrease it,” says Dr. Amen in the podcast episode.
In this blog, you’ll discover the decisions and traits that help lead to posttraumatic growth.
Trauma significantly alters brain activity. Brain SPECT imaging studies at Amen Clinics show that people who have experienced major traumatic events tend to have overactivity in the emotional centers of the brain in a diamond pattern.
According to a study in Plos One that used thousands of brain scans from Amen Clinics, overactivity occurs in the following brain regions:
Simultaneously, trauma reduces activity in the prefrontal cortex (PFC), which is responsible for impulse regulation, decision-making, empathy, and forward planning.
This imbalance means individuals with trauma often experience heightened fear responses (elevated amygdala activity) alongside diminished self-control (reduced PFC activity).
This mix of increased fear and reduced self-regulation often drives individuals toward self-medicating behaviors. Common coping mechanisms include using substances like alcohol, marijuana, or opiates. Other people turn to high-sugar diets as a way to self-soothe.
While these may temporarily soothe the amygdala and alleviate anxiety, they further suppress PFC activity, reducing control over such habits and creating a vicious cycle of escalating problems.
But it doesn’t have to.
According to Dr. Amen, a person’s brain health prior to trauma plays a major role in the resulting impacts following a traumatic experience.
“The brain you bring into the trauma determines the brain you have when you get out"
Dr. Amen.
For example, growing up in a home filled with stability, love, and connection, as Elizabeth did, enhances brain health. Her SPECT scans, which she sees for the first time on the Change Your Brain Every Day podcast, reveal the impacts of her experiences on her brain.
Dr. Amen suggests that having a healthier brain going into the trauma likely enabled her to cope better with the horrors of her captivity.
Compare her experience to a child who grew up in a chaotic environment with alcoholic, neglectful parents. The chronic stress of this type of upbringing harms the brain and drains resilience, which would have made it much harder for someone to withstand the additional trauma of a kidnapping.
When stresses and traumas are compounded, it increases the likelihood of lasting negative consequences, such as PTSD.
One fascinating area of trauma research focuses on posttraumatic growth (PTG), a concept introduced in the mid-1990s by psychologists Richard Tedeschi and Lawrence Calhoun from the University of North Carolina at Charlotte. PTG refers to the positive transformation that can occur following adversity.
Their research shows that when groups of people endure trauma—whether from personal loss, natural disasters, major life transitions, or even kidnapping—they respond differently.
This growth is driven by five key factors, captured by the mnemonic SPARK:
In Elizabeth’s case, she turned her pain into purpose by creating the Elizabeth Smart Foundation, which brings hope and empowerment to victims of sexual assault.
Following her kidnapping and captivity, Elizabeth returned to playing the harp and majored in music in college. Plus, she has written two books, My Story and Where There’s Hope.
Practicing positive thinking and mental self-care can further enhance this inner strength. “If I can survive that, I can survive anything,” became Elizabeth’s mantra.
By nurturing these factors, individuals can plant the seeds for growth, turning challenges into opportunities for a stronger, more meaningful future. Whether facing personal, professional, or societal adversity, post-traumatic growth offers a powerful reminder that growth and transformation are possible even in the face of hardship.
In addition to these elements, it’s critical to rehabilitate the brain after experiencing trauma, whether it’s emotional trauma, sexual abuse, natural disaster, or some other life-changing event.
This is especially important if a person has been self-medicating with substances like alcohol or marijuana.
According to the experts at Amen Clinics, healing the brain post trauma may involve avoiding harmful substances, taking nutritional supplements, consuming brain healthy foods, exercising regularly, engaging in helpful forms of psychotherapy, and in some cases, taking medication.
Dell’Osso, Liliana et al. “Post Traumatic Growth (PTG) in the Frame of Traumatic Experiences.” Clinical neuropsychiatry vol. 19,6 (2022): 390-393. doi:10.36131/cnfioritieditore20220606
Tedeschi, R G, and L G Calhoun. “The Posttraumatic Growth Inventory: measuring the positive legacy of trauma.” Journal of traumatic stress vol. 9,3 (1996): 455-71. doi:10.1007/BF02103658
Amen DG, et al. Functional Neuroimaging Distinguishes Posttraumatic Stress Disorder from Traumatic Brain Injury in Focused and Large Community Datasets. Plos One, July 1, 2015. https://doi.org/10.1371/journal.pone.0129659
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