An appropriate depersonalization disorder definition is sought by many. Depersonalization disorder can be defined as a disorder where the person suffering has feelings of not able to relate to his or her life. This disorder affects perceptual and attention processes and frequent complaints of going crazy and losing control are heard in patients of depersonalization disorder. The term was first used in a clinical sense in 1898 by Ludovic Dugas who called it ‘an alienation of personality.’
There are no clinical textbook symptoms for depersonalization disorder. The most important symptom of the depersonalization disorder is that the patients have an unreal sense of reality. The patient will use phrases like experiencing an out of body feeling or feeling like he or she is part of a dream or even feeling detached from one’s own thoughts and experiences. Such experiences can cause anxiety and stress which could lead to a diagnosis of a depersonalization disorder.