The authors investigated a broad range of memory functions for stimuli unrelated to trauma to determine whether symptoms such as intrusive memories might reflect an underlying cognitive deficit unrelated to the psychological content of the traumatic memory in patients with posttraumatic stress disorder (PTSD).

Yehuda R, Keefe RSE, Harvey PD, Levengood RA, Gerber DK, Geni J, Siever LJ. Learning and memory in combat veterans with post-traumatic stress disorder.  American Journal of Psychiatry, 1995; 152 (1): 137-139.