A syndrome prevalent among women living more or less confined, marked by:
(1) Coincidental appearance of psychotic symptoms in members of a family while living together.
(2) Appearance of psychotic symptoms in two closely associated persons and retention of symptoms once initiated, in spite of separation.
(3) Transmission of psychotic symptoms from a sick person to one person or several healthy individuals who elaborate on the induced delusions. Aetiology unknown; hereditary factors frequently involved.
- C. Lasègue, J. Falret:
La folie à deux ou folie communiquée.
Annales medico-psychologiques, Paris, 1877, 18: 321-355.
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