microptic hallucination

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.

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  • 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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