The purpose of the present study was to investigate the sleep of people diagnosed as suffering from chronic Post-Traumatic Stress Dkorder (PTSD). The sleep of seven chronic post-traumatic patients with no known physical injuries was compared with that of seven matched control subjects. The post-traumatic patients had poorer sleep: decreased sleep efficiency, increase in number of awakenings, and decreased SWS, as well as longer REM latency. It was also found that their complaints correlated with relevant sleep-monitored measures. The findings add further support for the inclusion of sleep difficulties in the definition of the Post-Traumatic S t r w Dirorder.

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To examine correlations among chronic Posttraumatic Stress Disorder (PTSD), control-related beliefs, and sleep difficulties 7 PTSD casualities and 7 non-PTSD matched subjects were compared in their laboratory sleep patterns as well as in their beliefs about personal control over external and internal events in general and over sleep-related events in particular. Analyses indicated that PTSD casualties had poorer sleep and reported more doubts regarding their ability to control external and internal events than control subjects. Further, we found a significant association between perceived control and sleep difficulties. Results were discussed in terms of Horowitz's conception of intrapsychic processes related to PTSD.

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