- The term plagiopsia comes from the Greek words plagios (tilted) and opsis (seeing). It is used to denote a visual distortion in which objects are perceived as inclined. As a phenomenon, plagiop-sia was described as early as 1933 by the British neurologists Macdonald Critchley (1900-1997) and Fergus Ferguson. It is associated primarily with * aurae occurring in the context of paroxysmal neurological disorders such as migraine and epilepsy, and with the use of * hallucinogenic substances such as LSD and mescaline. It is commonly classified as a *metamorphopsia, which is itself classified as a * sensory distortion. In a conceptual and phenomenological sense, plagiop-sia is closely related to * environmental tilt and * tortopia.ReferencesCritchley, M., Ferguson, F. (1933). Migraine. Lancet, 1, 123-126. Klee, A., Willanger, R. (1966). Disturbances of visual perception in migraine. Acta Neurologica Scandinavica, 42, 400-414. Wieser, H.G. (2000). Temporal lobe epilepsies. In: Handbook of clinical neurology. Volume 73. The epilepsies. Part II. Edited by Vinken, P.J., Bruyn, G.W. Amsterdam: Elsevier Science Publishers.
Dictionary of Hallucinations. J.D. Blom. 2010.
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Alice in Wonderland syndrome — Also known as Alice in Wonderland effect, Wonderland syndrome, and syndrome of Alice in Wonderland. The term syndrome of Alice in Wonderland was introduced in or shortly before 1955 by the British psychiatrist John Todd (1914 1987) to denote a … Dictionary of Hallucinations
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environmental tilt — Also referred to as visual tilting, tilting illusion, upside down reversal of seeing, and floor on ceiling phenomenon. All five terms denote a transient illusory percept in which the extracor poreal environment assumes a tilted or upside down… … Dictionary of Hallucinations
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metamorphopsia — The term metamorphopsia comes from the Greek words metamorphoun (to change the form) and opsis (seeing). It translates roughly as seeing an altered form . It is not clear who introduced the term, but it appears in a medical lexicon as early as … Dictionary of Hallucinations
tortopia — The term tortopia comes from the Latin tor tum (that which has been turned) and the Greek verb opsis (seeing). It translates loosely as seeing things in a tilted position . The term was proposed in 1983 by the American neurologist Allan H.… … Dictionary of Hallucinations