Editing Nightmare (section)

==Classification==
According to the [[International Classification of Sleep Disorders]]-Third Edition (ICSD-3), the nightmare disorder, together with [[Rapid eye movement sleep behavior disorder|REM sleep behaviour disorder]] (RBD) and recurrent isolated [[sleep paralysis]], form the REM-related [[parasomnia]]s subcategory of the Parasomnias cluster.<ref name="sateia">{{cite journal |last1=Sateia |first1=Michael J |title=International Classification of Sleep Disorders-Third Edition |journal=Chest |date=2014 |volume=146 |issue=5 |pages=1387–1394 |doi=10.1378/chest.14-0970 |pmid=25367475 |issn=0012-3692}}</ref> Nightmares may be idiopathic without any signs of psychopathology or associated with disorders like stress, anxiety, substance abuse, psychiatric illness or [[Post-traumatic stress disorder|PTSD]] (>80% of PTSD patients report nightmares).<ref name="morgen">{{cite journal |last1=Morgenthaler |first1=Timothy I. |last2=Auerbach |first2=Sanford |last3=et |first3=al. |title=Position Paper for the Treatment of Nightmare Disorder in Adults: An American Academy of Sleep Medicine Position Paper |journal=Journal of Clinical Sleep Medicine |date=2018 |volume=14 |issue=6 |pages=1041–1055 |doi=10.5664/jcsm.7178 |pmid=29852917 |issn=1550-9389|pmc=5991964 }}</ref> As regarding the dream content of the dreams they are usually imprinting negative emotions like sadness, fear or rage.<ref name="peter"/> According to the clinical studies the content can include being chased, injury or death of others, falling, natural disasters or accidents. Typical dreams or recurrent dreams may also have some of these topics.<ref name="schredl">{{cite journal |last1=Schredl |first1=Michael |last2=Göritz |first2=Anja S. |title=Nightmare Themes: An Online Study of Most Recent Nightmares and Childhood Nightmares |journal=Journal of Clinical Sleep Medicine |date=2018 |volume=14 |issue=3 |pages=465–471 |doi=10.5664/jcsm.7002 |pmid=29458691 |pmc=5837849 }}</ref>