derealize
Derealization is an alteration in the perception of the external world, causing those with the condition to perceive it as unreal, distant, distorted, or in other ways falsified. Other symptoms include feeling as if one's environment lacks spontaneity, emotional coloring, and depth. Described as "Experiences of unreality or detachment with respect to surroundings (e.g., individuals or objects are experienced as unreal, dreamlike, foggy, lifeless or visually distorted") in the DSM-5, it is a dissociative symptom that may appear in moments of severe stress.
Derealization is a subjective experience pertaining to a person's perception of the outside world, while depersonalization is a related symptom characterized by dissociation from one's own body and mental processes. The two are commonly experienced in conjunction but can also occur independently.
Chronic derealization is fairly rare, and may be caused by occipital–temporal dysfunction. Experiencing derealization for long periods of time or having recurring episodes can be indicative of many psychological disorders, and can cause significant distress. Temporary derealization symptoms are commonly experienced by the general population a few times throughout their lives, with a lifetime prevalence of 26%–74% and a prevalence of 31%–66% at the time of a traumatic event.
Derealization is linked to childhood trauma, with its severity correlating directly with the reported severity of childhood maltreatment.
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