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The syndrome of subjective doubles is a rare delusional misidentification syndrome in which a person experiences the delusion that he or she has a double or Doppelgänger with the same appearance, but usually with different character traits, that is leading a life of its own.〔 The syndrome is also called the syndrome of doubles of the self, delusion of subjective doubles,〔 or simply subjective doubles.〔 Sometimes, the patient is under the impression that there is more than one double.〔 A double may be projected onto any person, from a stranger to a family member.〔 This syndrome is often diagnosed during or after the onset of another mental disorder, such as schizophrenia or other disorders involving psychotic hallucinations.〔 There is no widely accepted method of treatment, as most patients require an individualized therapy. The prevalence of this disease is relatively low, as few cases have been reported since the disease was defined in 1978 by George Christodoulou.〔〔 However, subjective doubles is not clearly defined in literature,〔 and therefore, may be under-reported.〔 == History == This disorder was first defined in 1978 by Greek psychiatrist George N. Christodoulou, M.D., Ph.D, FRCPsych. Although the symptoms of subjective doubles have been described before 1978,〔 the disorder was not given a name until Christodoulou called it the ''syndrome of subjective doubles'' in the American Journal of Psychiatry. The article describes an 18-year-old female suffering from hebefreno-paranoid schizophrenia who believed that her next door neighbor had transformed her physical self into the patient's double.〔 The syndrome of subjective doubles and its variants were not given the name ''delusional misidentification syndromes'' until 1981.〔 Doubles of the self have been reported in literature even before the syndrome was named by Christodoulou.〔 The first patient with symptoms of Capgras syndrome, another delusional misidentification syndrome, was reported in 1923 by Joseph Capgras and Jean Reboul-Lachaux. This patient, however, also experienced the delusion of subjective doubles, but the appearance of doubles of the self were not addressed until Christodoulou's article in 1978.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Syndrome of subjective doubles」の詳細全文を読む スポンサード リンク
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