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When Freud invented/discovered psychoanalysis, he devised not just a theory of mind but also a tool that enabled him to observe the "mind." And with the tool of psychoanalysis, he was able to observe the workings of the default mode network (DMN) some hundred years before anyone knew of its existence. Since then, various operations of the DMN have been identified. One is the integration of perception into memory through the process of functional connectivity. In posttraumatic stress disorder (PTSD) there is significant pathology in functional connectivity involving multiple brain networks-especially the DMN and the intrinsic alarm system. This article addresses the causes and consequences of this pathophysiology as it relates to the sense of time, safety, and story in PTSD.
Richard Brockman (Mon,) studied this question.