folie a plusieurs
Michelle Bernard just used this term on MSNBC. Interesting.
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Folie à deux (/fɒˈli ə ˈduː/; French pronunciation: [fɔli a dø]; French for "madness of two"
, or shared psychosis,[1] is a psychiatric syndrome in which symptoms of a delusional belief and sometimes hallucinations[2][3] are transmitted from one individual to another.[4] The same syndrome shared by more than two people may be called folie à trois, folie à quatre, folie en famille, or even folie à plusieurs ("madness of many" .
Recent psychiatric classifications refer to the syndrome as shared psychotic disorder (DSM-IV – 297.3) and induced delusional disorder (F24) in the ICD-10, although the research literature largely uses the original name. This disorder is not in the current DSM (DSM-5). The disorder was first conceptualized in 19th-century French psychiatry by Charles Lasègue and Jean-Pierre Falret and so also known as Lasègue-Falret syndrome.[2][5]
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