-sleep deprivation/ extreme fatigue
-causation insn't very conclusive for this disorder
-Reoccuring and abrupt awakening from sleep due to intense nightmares.
-intense fear and signs of autonomic excitement (tachycardia, rapid breathing, sweating) during episodes
-relative unresponsiveness to any effort tocomfort the individual during episode
-clinically significant distress and impairment to functioning
-disturbance not due to the direct physiological effects of a substance or existing general medical condition.