Question about psychopharm for PTSD

Hello all,

I have a group presentation regarding (mostly) the treatment of PTSD as well as antipsychotics. The portion of the presentation that was assigned to me reads: "Auditory Intensity Paradigm." I'll be honest, I don't really know what that is.

Through some research I have found out that serotonergic transmission has been implicated in PTSD and the intensity-dependent auditory evoked potential (IDAEP) has been suggested to be a biological marker of central serotonergic activity. This provides an opportunity to more precisely characterize PTSD patient populations, and possibly predict the response to treatment.

So, is this accurate/does it make sense?

Could someone try to explain this to me in a way that I won't sound like an idiot as I'm presenting?