Traumatic memory is implicit memory.
Ordinary, or narrative, memory is explicit. They involve different areas of the brain. These studies showed that the limbic system is the most active part of the brain during these symptoms, while the cortex shows little activity, especially in the region that governs speech. I also have great difficulty when researchers assume that knocking over a punch bowl at a wedding or even putting one's hand through a window is comparable to being raped by one's father at the age of 5. It would be a refreshing change to see some of that research highlighted.