
This is the second installment in a 3-part series discussing the behavioral, cellular, and molecular characteristics of posttraumatic stress disorder (PTSD). The first installment described clinical aspects of PTSD and how these characteristics make understanding the underlying biological substrates so challenging. In this installment, I discuss progress addressing these challenges at the tissue and cell level. In the final installment, I will review potential genetic underpinnings of PTSD, with emphasis on potentially heritable risk factors.
