Yes, it was the hippocampus I was thinking of after all. Have your manager call me. 
That would also makes sense.
Continued trauma exposure has shown to result in a reduced volume/smaller hippocampus compared to non-traumatized people.
I do know that the hippocampus play a role in distinguishing/discriminating between past and present experiences, which would take into account the traumatized person's experience of hypervigilance (always be on guard) and other PTSD symptoms, if they have more trouble discriminating between the past and present, thus interpreting a present experience as dangerous when it is not (e.g., a traumatized person may experience a current situation as life threatening when it is not).
Judith Herman, probably one of the most profound people in the trauma field, talked about big "T" trauma and little "t" trauma. In that regard, we will all experience some form of trauma, whether it be small trauma or large trauma. Most of us experience little "t" trauma or single events of trauma, instead of big "T" trauma or Complex Trauma (which is repeated chronic trauma over a long period of time, usually by caregivers, its invasive, and of course, interpersonal in nature, and is repetitive and prolonged--this usually occurs in childhood).
One of the more interesting that I have discovered is the body as politic (Body Politic). The body itself acts as countries or states do, in the sense that the body has physical and mental boundaries, just like states and countries (more physical boundaries). When people are traumatized, especially sexually traumatized at a young age, there is often a sense of invasion of outsiders, i.e., a cross of the physical boundary into the body, in which the person no longer even feels safe in their own body. Even with people who are not traumatized, we have an instinctual nature to not let foreign agents invade our space, whether its our physical or mental space, cultural space, or country space. One can imagine the extreme sense of bodily violation when a 4-year-old is sexually abused and the lasting implications on the body politic--the fear of letting anyone in, getting close to anyone, etc--in the traumatized world, the person perceives everyone as a foreign agent, encroaching upon their physical and mental safety.
PS-I love talking about this stuff.