Jerusalem syndrome

Jerusalem syndrome is a rare, acute psychotic episode in which visitors to Jerusalem develop religious delusions or identify with biblical figures. It is not a formal diagnosis in major psychiatric classification systems.

Psychosis: A mental state involving substantial disruption in reality testing, sometimes with delusions or hallucinations. Some Jerusalem syndrome episodes include delusions or hallucinations, though the syndrome is not itself a formal diagnosis.
Type I Jerusalem syndrome: A reported form of Jerusalem syndrome involving visitors with a history of psychotic illness. This group is distinguished by pre-existing psychiatric conditions that may shape episodes in Jerusalem.
Yair Bar-El: An Israeli psychiatrist associated with clinical descriptions of Jerusalem syndrome. Bar-El and colleagues proposed a classification based on their observations of affected visitors.
Diagnostic and Statistical Manual of Mental Disorders: A diagnostic classification manual published by the American Psychiatric Association. Jerusalem syndrome is not listed as a standalone diagnosis in this manual.
Religious delusion: A delusion whose content is shaped by religious beliefs, themes, or figures. Biblical identity claims and divinely directed missions are reported forms of the syndrome's delusional content.
Type II Jerusalem syndrome: A reported form involving visitors with unusual personality traits or intense religious preoccupations, without established psychosis. Reports describe distinctive pre-visit traits and religious fixation in some affected visitors.
Jerusalem syndrome (1991 paper): A clinical paper by Yair Bar-El and colleagues describing Jerusalem syndrome and its proposed types. This publication helped establish the syndrome as a named clinical phenomenon.
International Classification of Diseases: The World Health Organization's system for classifying diseases and health conditions. Its classifications likewise do not establish Jerusalem syndrome as a distinct disorder.
Brief psychotic disorder: A psychiatric diagnosis involving sudden psychotic symptoms lasting at least one day but less than one month. Its duration-based diagnostic criteria differ from Jerusalem syndrome's descriptive, place-linked label.
Type III Jerusalem syndrome: A reported acute psychotic episode in a visitor without known prior mental illness or unusual religious preoccupation. This rare pattern is the clearest example of symptoms emerging during a Jerusalem visit.

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