microptic hallucination
   Also known as microscopic hallucination and diminutive visual hallucination. The term microptic hallucination is indebted to the Greek words mikros (small) and opsis (seeing). It refers to a type of *visual hallucination in which the hallucinated object is perceived as disproportion-ally small in comparison with the 'background' of regular sense perceptions. A subtype of the microptic hallucination, characterized by the perception of disproportionally small human figures, is known as a *lilliputian hallucination. Microptic hallucinations may present as an isolated symptom, as part of an * aura, or as part of a cluster of symptoms called the *Alice in Wonderland syndrome. Etiologically, they are associated with varying conditions such as epileptic seizures, migraine, * delirium, * delirium tremens, alcohol withdrawal, toxoplasmosis or typhoid infections, mesencephalic lesions, * Charles Bonnet syndrome, and intoxication with * hallucinogens such as LSD and mescaline. In individuals with a clinical diagnosis of schizophrenia they would seem to be relatively rare. The term microptic hallucination is used in opposition to the term *macroptic hallucination. It should not be confused with *micropsia.
   References
   Ey, H. (2004). Traité des hallucinations. Tome 1. Paris: Claude Tchou pour la Bibliothèque des Introuvables.
   Jaspers, K. (1963). Gesammelte Schriften zur Psychopathologie. Berlin: Springer-Verlag.

Dictionary of Hallucinations. . 2010.

Look at other dictionaries:

  • macroptic hallucination —    The term macroptic hallucination is indebted to the Greek words makros (large) and opsis (seeing). It refers to a visual hallucination in which the object or scene in question is perceived as disproportionally large in comparison with the… …   Dictionary of Hallucinations

  • diminutive visual hallucination —    see microptic hallucination …   Dictionary of Hallucinations

  • microscopic hallucination —    see microptic hallucination …   Dictionary of Hallucinations

  • peduncular hallucination —    Also known as peduncular hallucinosis, pedunculopontine hallucinosis, Lhermitte s hallucinosis, Lhermitte syndrome, *brainstem hallucination, and mesencephalic hallucinosis. The eponyms Lhermitte s hallucinosis and Lhermitte syndrome refer to… …   Dictionary of Hallucinations

  • hypnagogic hallucination —    Also known as hypnagogic imagery, hypnagogic reverie, hypnagogic illusion, hypnagogic visualization, presomnal sensation, predormital hallucination, anthypnic sensation, oneirogagic image, phantasma, vision of half sleep, and faces in the dark …   Dictionary of Hallucinations

  • lilliputian hallucination —    A term used to denote a hallucination featuring miniature individuals, animals, objects, or fantasy figures. The notion of lilliputian hallucination constitutes the logical and conceptual counterpart of the gulliverian hallucination. Both… …   Dictionary of Hallucinations

  • visual hallucination —    Also referred to as vision. Both terms are indebted to the Latin noun visio, which means sight. They are used to denote a hallucination of sight. Historically, visual hallucinations have been divided into a multitude of types. Using their… …   Dictionary of Hallucinations

  • micropsia —    Also known as micropsy, microptic vision, Lilliput sight, Lilliput vision, and lilliputianism, after the fictitious country featuring in the novel Gulliver s Travels by the Irish poet and author Jonathan Swift (1667 1745). The term micropsia… …   Dictionary of Hallucinations

  • morphopsia —    The term morphopsia comes from the Greek words morphè (form) and opsis (seeing). It is used in a restricted sense to denote a multicoloured *complex visual hallucination with *microptic or * macroptic aspects. Pathophysiologically, this type… …   Dictionary of Hallucinations

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