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Qureshi SU, Long ME, Bradshaw MR, Pyne JM, Magruder KM, Kimbrell T, Hudson TJ, Jawaid A, Schulz PE, Kunik ME. Does PTSD impair cognition beyond the effect of trauma? The Journal of Neuropsychiatry and Clinical Neurosciences. 2011 Dec 12; 23(1):16-28.
This systematic review analyzed data from studies examining memory and cognitive function in subjects with posttraumatic stress disorder (PTSD), compared with subjects exposed to trauma (but without PTSD). Based on analysis of 21 articles published in English from 1968 to 2009, the conclusion is that individuals with PTSD, particularly veterans, show signs of cognitive impairment when tested with neuropsychological instruments, more so than individuals exposed to trauma who do not have PTSD.