In psychiatry, monomania (from Greek monos, one, and mania, mania) is a type of paranoia in which the patient has only one idea or type of ideas. Emotional monomania is that in which the patient is obsessed with only one emotion or several related to it; intellectual monomania is that which is related to only one kind of delirious idea or ideas.
It is monomania from which Flaubert's tragic heroine Madame Bovary suffers; in her case it takes the form of an incessant guilt and fear of discovery. The same monomaniacal fear is explored in great depth in M. E. Braddon's novel, Lady Audley's Secret, through the protagonist Robert Audley, whom the guilty woman accuses of monomania in his relentless attempt to prove her guilt. She describes monomania thus:
What is one of the strangest diagnostics of madness--what is the first appalling sign of mental aberration? The mind becomes stationary; the brain stagnates; the even current of reflection is interrupted; the thinking power of the brain resolves itself into a monotone. As the waters of a tideless pool putrefy by reason of their stagnation, the mind becomes turbid and corrupt through lack of action; and the perpetual reflection upon one subject resolves itself into monomania.
In Crime and Punishment, by the renowned Russian novelist Fyodor Dostoevsky, the main character, Raskolnikov, is said to be a monomaniac on numerous occasions.
