The hippocampus shrinks to the size of a walnut or less, it dries up. The amygdala expands beyond recognition. Hormone creation and distribution is disrupted and runs amuck. With the amygdala so enlarged there is no fight or flight, there is only fear. And this is just what happens to 2 organs of the body. They never recover, ever. Now imagine what happens to the rest of the body, heart rate, blood pressure, on and on. I have lived this way for 58 years. To called it “toxic stress” is, yes correct, but at first blush an understatement at best. It is a living hell. Another way of looking at it is, think of a vet coming home from war. Now apply that to a child’s brain. PTSD is the only known mental illness that actually changes the physical structure of the brain. Now think what that does to the future of a child’s life.