This article on Post-Traumatic Stress Disorder (PTSD) presents a definition for and analysis of dissociation in relation to PTSD. From the article: "Clinical and research interest in dissociation has increased over the last two decades, with particular emphasis on assessing the relationship between dissociation and PTSD. This issue of the PTSD Research Quarterly addresses several topics relevant to evaluating the extant literature on dissociation and PTSD. First, we review recent perspectives on the definition of dissociation. Next, we discuss two complementary lines of research that inform questions about the relationship between dissociation and PTSD. The first line of inquiry evaluates the role of dissociation at the time (peritraumatic dissociation) or in the aftermath (persistent dissociation) of the trauma in predicting PTSD. The second line of research examines co-occurring dissociation and PTSD symptoms."
National Center for PTSD: http://www.ptsd.va.gov/
PTSD Research Quarterly (Winter 2006), v.17 no.1