pathological hallucination
   The term hallucination pathologique was used by the French alienist Alexandre Jacques François Brierre de Boismont (1797-1881) to denote a hallucination associated with a "troubled reason". As he wrote, "Pathological hallucination... has its origin in diverse causes and mostly false ones; it is almost always associated with delirious conceptions. It invokes most erroneous and contradictory motives. Almost always it is impregnated with childish terrors, or is based on ridiculous exaggerations. It presents remarkable transformations. After time, it causes confusion of ideas and enfeeblement of reason." Brierre de Bois-mont distinguishes pathological hallucinations from *physiological hallucinations. As he asserts, "Their different character depends on whether the reason is intact or troubled." His notion of pathological hallucination would seem to resemble the notion of * delirious hallucination as used by the French psychiatrist Henri Ey (1900-1977).
   References
   Brierre de Boismont, A. (1859). On hallucinations. A history and explanation ofapparitions, visions, dreams, ecstasy, magnetism, and somnambulism. Translated by Hulme, R.T. London: Henry Renshaw.
   Leudar, I., Thomas, P. (2000). Voices ofreason, voices ofinsanity. Studies ofverbal hallucinations. London: Routledge.

Dictionary of Hallucinations. . 2010.

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