“Brain scans prove that patients who’ve sustained significant childhood trauma have brains that look different from people who haven’t. Traumatized brains tend to have an enlarged amygdala—a part of the brain that is generally associated with producing feelings of fear. Which makes sense. But it goes further than that: For survivors of emotional abuse, the part of their brain that is associated with self-awareness and self-evaluation is shrunken and thin.
Women who’ve suffered childhood sexual abuse have smaller somatosensory cortices—the part of the brain that registers sensation in our bodies. Victims who were screamed at might have an altered response to sound. Traumatized brains can result in reductions in the parts of the brain that process semantics, emotion and memory retrieval, perceiving emotions in others, and attention and speech. Not getting enough sleep at night potentially affects developing brains’ plasticity and attention and increases the risk of emotional problems later in life. And the scariest factoid, for me anyway: Child abuse is often associated with reduced thickness in the prefrontal cortex, the part of the brain associated with moderation, decision-making, complex thought, and logical reasoning.
Brains do have workarounds. There are people without amygdalae who don’t feel fear. There are people who have reduced prefrontal cortices who are very logical. And other parts of the brain can compensate, make up the lost parts in other ways. But overall, when I looked at the breadth of evidence, the results felt crushing.
The fact that the brain’s cortical thickness is directly related to IQ was particularly threatening to me. Even if I wasn’t cool, or kind, or personable, I enjoyed the narrative that I was at least effective. Intelligent. What these papers seemed to tell me is that however smart I am, I’m not as smart as I could have been had this not happened to me. The questions arose again: Is this why my pitches didn’t go through? Is this why my boss never respected me? Is this why I was pushed to do grunt work in the back room?”