Trauma is not just what happened to you. It is what happened inside your nervous system when it could not return to safety. In Trauma in the Neurons: What the Body Won't Let Go, neuroscientist and clinical psychologist Gregory Bicaj brings two decades of laboratory research and direct clinical work together to offer a rigorous, humane, and ultimately hopeful account of how trauma reshapes the brain, the body, and the self—and what it takes to heal. Drawing on the neuroscience of threat detection, stress physiology, memory, and neuroplasticity, Bicaj explains why trauma survivors often know intellectually that they are safe yet still feel under constant threat.