Shared Hysteria – Folie à Deux & The Swedish Twins

Folie à deux is French for “a madness shared by two”, or shared psychosis and is a psychiatric syndrome. Symptoms include delusional beliefs and are often accompanied by hallucinations which are passed from one individual to another.  This particular disorder was first conceptualized in 19th-century French psychiatry by  Charles Lasègue and Jean-Pierre Falret and is also known as Lasègue-Falret Syndrome.

The disorder does not discriminate; meaning anyone can pass their delusions onto another whether the other is a twin, siblings from separate births, any relative, or friends. Two people can be perfectly stable when not together, but when together can brew up a terrifying storm of horrific delusions, putting themselves and others at risk. The documentary “Madness in the Fast Lane – Ursula and Sabina Eriksson”, which we are presenting to you today, will demonstrate just how horrifying this disorder can be for all involved.


If you should happen to explore this story further on your own, you will most definitely run across conspiracy theories pertaining to this specific event. Don’t fret, as it is only more hysteria. You can easily study the disorder on its own to validate the authenticity of the syndrome’s symptoms.

– altered by Hystoria

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