Induced insanity; communicated insanity

Japanese: 感応精神病 - かんのうせいしんびょう（英語表記）induced insanity; communicated insanity

A mental illness that occurs in a person who is in a close relationship with a mentally ill person in terms of daily life or experiences, and is identical to or integrated with the symptoms of the mentally ill person. Symptoms include delusions, hallucinations, confusion, delirium, fainting, and convulsions, but are essentially psychogenic reactions. It is most likely to occur between pairs of people, such as parents and children, spouses, or siblings (dyadic psychosis), but it can also occur between three, four, or even multiple people.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

ある精神病者と日常生活や体験などにおいて密接な関係にある人に，その患者の病状と同一の，あるいは一体となった形で発症する精神病。妄想，幻覚，錯乱，せん妄，失神，けいれんなどの症状を示すが，本質的には心因反応である。親子，夫婦，同胞など，2人組の間に起りやすい (2人組精神病) が，3人，4人，あるいは多数の間にもときにみられる。

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