Folie à deux

Folie à deux (literally, "a madness shared by two") is a rare psychiatric syndrome in which a symptom of psychosis (particularly a paranoid or delusional belief) is transmitted from one individual to another. The same syndrome shared by more than two people may be called folie à trois, folie à quatre, folie à 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 (folie à deux) (F.24) in the ICD-10, although the research literature largely uses the original name.

http://en.wikipedia.org/wiki/Folie_%C3%A0_deux


If I'd thought about it I never would've done it, I guess I would've let it slide,
If I'd lived my life by what others were thinkin', the heart inside me would've died.
I was just too stubborn to ever be governed by enforced insanity,
Someone had to reach for the risin' star,I guess it was up to me.

http://www.bobdylan.com/songs/uptome.html