- Also known as hygric sensation. Both terms are indebted to the Greek noun hugros, which means humidity. They are used to denote a hallucination of water or other fluids, perceived in the tactile modality. Accordingly, the German psychiatrist and philosopher Karl Jaspers (1883-1969) classifies hygric hallucinations as a subclass of the " haptic hallucination. The British neurologist Macdonald Critchley (1900-1997), by contrast, classifies them as a type of "dysaesthesia. Hygric hallucinations may be experienced as cold, tepid, warm, or hot. They have been reported in the context of the use of "hallucinogens such as LSD and mescaline, but also in "aural phenomena preceding paroxysmal neurological disorders such as migraine and epilepsy. The term hygric hallucination should not be confused with the term " waterfall illusion.ReferencesCritchley, M. (1953). The parietal lobes. London: Edward Arnold & Co.Jaspers, K. (1997). Generalpsychopathology. Volume 1. Translated by Hoenig, J., Hamilton, M.W. Baltimore, MA: Johns Hopkins University Press.
Dictionary of Hallucinations. J.D. Blom. 2010.
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hygric sensation — see hygric hallucination … Dictionary of Hallucinations
tactile hallucination — Also known as tactile phantasma, haptic hallucination, touch hallucination, and hallucination of touch. The term tactile hallucination is indebted to the Latin verb tangere, which means to touch. It refers to a bodily sensation seemingly… … Dictionary of Hallucinations
dysaesthesia — The term dysaesthesia comes from the Greek words dus (bad) and aisthanesthai (to notice, to perceive). It translates loosely as bad feeling . The term dysaesthesia is used as a generic term for a number of unpleasant tactile and somatic… … Dictionary of Hallucinations
waterfall illusion — Also known as waterfall effect and waterfall phenomenon. All three terms refer to a variant of the * motion aftereffect characterized by an optical *illusion of upward motion in stationary objects. The term waterfall illusion was coined in or… … Dictionary of Hallucinations