“…for nightmares with various underlying psychological and physiological mechanisms. Experiencing a traumatic event may initiate or exacerbate the occurrence of nightmares (Blanes et al, 1993). Indeed, nightmares are considered a hallmark of post-traumatic stress disorder (PTSD) and are frequently reported by individuals with PTSD (Ross, Ball, Sullivan, & Caroff, 1989;Rothbaum, Foa, Riggs, Murdock, & Walsh, 1992).…”