New findings in neuroscience, psychology and immunology tell us that the adversity we face during childhood has farther-reaching consequences than we might ever have imagined. When children or teens face adversity and especially unpredictable stressors, they are left with deeper, longer‑lasting scars. When the young brain is thrust into stressful situations over and over again without warning, and stress hormones are repeatedly ramped up, small chemical markers, known as methyl groups, adhere to specific genes that regulate the activity of stress‑hormone receptors in the brain. These epigenetic changes hamper the body’s ability to turn off the stress response. In ideal circumstances, a child learns to respond to stress, and recover from it, learning resilience. But kids who’ve faced chronic, unpredictable stress undergo biological changes that cause their inflammatory stress response to stay activated.
Joan Kaufman, director of the Child and Adolescent Research and Education (CARE) program at the Yale School of Medicine, recently analyzed DNA in the saliva of happy, healthy children, and of children who had been taken from abusive or neglectful parents. The children who’d experienced chronic childhood stress showed epigenetic changes in almost 3,000 sites on their DNA, and on all 23 chromosomes – altering how appropriately they would be able to respond to and rebound from future stressors.
Experiencing stress in childhood changes your set point of wellbeing for decades to come. In people with a history of chronic childhood stress, the endocrine and immune systems are churning out a damaging and inflammatory cocktail of stress neurochemicals in response to even small stressors – an unexpected bill, a disagreement with their spouse, a car that swerves in front of them on the highway, a creak on the staircase – for the rest of their lives. They might find themselves overreacting to, and less able to recover from, the inevitable stressors of life. They’re always responding. And all the while, they’re unwittingly marinating in inflammatory chemicals, which sets the stage for full-throttle disease down the road, in the form of autoimmune disease, PNES – psychogenic non-epileptic seizures, heart disease, cancer, fibromyalgia, chronic fatigue, fibroid tumors, irritable bowel syndrome, ulcers, migraines and asthma.
Researchers Anda and Felitti surveyed these 17,000 individuals on about 10 types of adversity, or adverse childhood experiences (ACEs). To be clear, the patients Felitti and Anda surveyed were not troubled or disadvantaged; the average patient was 57, and three-quarters had attended college. These were ‘successful’ men and women, mostly white, middle-class, with stable jobs and health benefits. Felitti and Anda expected their number of ‘yes’ answers to be fairly low.
When the results came in, Felitti and Anda were shocked: 64% of participants answered ‘yes’ to having encountered at least one category of early adversity, and 87% of those patients also had additional adverse childhood experiences; 40% had suffered two or more ACEs; 12.5% had an ACE score greater than or equal to 4.
Felitti and Anda went a step further: they were able to directly link ACE scores to illness. The higher the ACE score, the higher the number of doctor’s appointments in the past year, and the more unexplained physical symptoms reported.
Often, these illnesses can be chronic and lifelong: autoimmune disease. heart disease, chronic bowel disorders, migraines, and persistent depression. Even today, doctors puzzle over these very conditions: why are they so prevalent;
Scientists at Duke University in North Carolina, the University of California, San Francisco, and Brown University in Rhode Island have shown that childhood adversity damages us on a cellular level in ways that prematurely age our cells and affect our longevity. Adults who faced early life stress show greater erosion in what are known as telomeres – protective caps that sit on the ends of DNA strands to keep the DNA healthy and intact. As telomeres erode, we’re more likely to develop disease, and we age faster; as our telomeres age and expire, our cells expire and so, eventually, do we.
Researchers have also seen a correlation between specific types of adverse childhood experiences and a range of diseases. For instance,
To date, more than 1,500 studies founded on Felitti and Anda’s hallmark ACE research show that both physical and emotional suffering are rooted in the complex workings of the immune system, the body’s master operating control center – and what happens to the brain during childhood sets the programming for how our immune systems will respond for the rest of our lives.
The unifying principle of this new theory of everything is this: your emotional biography becomes your physical biology, and together, they write much of the script for how you will live your life. Put another way: your early stories script your biology and your biology scripts the way your life will play out.
Now we have scientific evidence that the brain is genetically modified by childhood experience. With hundreds of studies showing that childhood adversity hurts our mental and physical health, putting us at greater risk for learning disorders, cardiovascular disease, autoimmune disease, PNES – psychogenic non-epileptic seizures, depression, obesity, suicide, substance abuse, failed relationships, violence, poor parenting and early death, we just can’t afford to make such distinctions.
Science tells us that biology does not have to be destiny. ACEs can last a lifetime, but they don’t have to. If anything, that’s the most important take-away from ACE research: the brain and body are never static; they are always in the process of becoming and changing.
Even if we have been set on high-reactive mode for decades or a lifetime, we can still dial it down. We can respond to life’s inevitable stressors more appropriately and shift away from an overactive inflammatory response. We can become neurobiologically resilient. We can turn bad epigenetics into good epigenetics and rescue ourselves. We have the capacity, within ourselves, to create better health. We might call this brave undertaking ‘the neurobiology of awakening’.
Today, scientists recognize a range of promising approaches to help create new neurons (known as neurogenesis), make new synaptic connections between those neurons (known as synaptogenesis), promote new patterns of thoughts and reactions, bring under-connected areas of the brain back online – and reset our stress response so that we decrease the inflammation that makes us ill.
You can find ways to start right where you are, no matter how deep your scars or how long ago they occurred. Many mind-body therapies not only help you to calm your thoughts and increase your emotional and physical wellbeing, but research suggests that they have the potential to reverse, on a biological level, the harmful impact of childhood adversity.
Recent studies indicate that individuals who practice mindfulness meditation and mindfulness-based stress reduction (MBSR) show an increase in gray matter in parts of the brain associated with managing stress, and experience shifts in genes that regulate their stress response and their levels of inflammatory hormones. Other research suggests that a process known as neurofeedback can help to regrow connections in the brain that were lost to adverse childhood experiences.
Meditation, mindfulness, neurofeedback, cognitive therapy, EMDR (eye movement desensitization and reprocessing), music therapy: these promising new avenues to healing can be part of any patient’s recovery plan. The more we learn about the toxic impact of early stress, the better equipped we are to counter its effects, and help to uncover new strategies and modalities to come back to who it is we really are, and who it was we might have been had we not encountered childhood adversity in the first place.
This is an adapted and reprinted extract from ‘Childhood Disrupted: How Your Biography Becomes Your Biology, and How You Can Heal’ (Atria), by Donna Jackson Nakazawa. Copyright © Donna Jackson Nakazawa, 2015.