| Summary: | Dream enactment behavior (DEB) contains the hallmark criteria for the diagnosis of REM behavior disorder (RBD) and it is attributed as the underlying mechanism with its distinct pathology and presentation. The recently described condition, trauma associated sleep disorder (TSD), is closely related to posttraumatic stress disorder (PTSD), and shares the same diagnostic criteria for RBD but they differ significantly in their underlying pathophysiology. The transition from one to another has not been described well (and only self-reported) in the medical literature. This article describes a case study of a patient with a history of PTSD in remission, who developed symptoms documented by polysomnography that are typical of idiopathic RBD that are not connected to the patient's previous trauma
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