slide show format of visual hallucinations
- Also referred to as movie format of visual hallucinations. Both terms are used to convey the speed and recurrent discontinuities which characterize * visual hallucinations in some individuals. A rapid flow of images, as well as 'jumps' from one scene to the next lend these hallucinations the phenomenological quality of a slide show, a kaleidoscope, or a DVD in fast-forward mode. Sometimes the scenes appear as if projected upon a screen or window pane in front of the individual's eyes, often with a bright light at the centre of the image. The slide show format of visual hallucinations has been described chiefly during * hypnagogic and * hypnopompic states, but it has also been described as a typical characteristic of * cannabis- and * hallucinogen-induced visual hallucinations. Although its pathophysiological basis is unknown, it is not unthinkable that there is a parallel with the pathophysiological substrates of *akinetopsia (i.e. a selective deficit in the ability to perceive motion) and * cinematographic vision (i.e. a transient form of akinetopsia occurring in the context of an * aura).ReferencesSiegel, R.K., Jarvik, M.E. (1975). Drug-induced hallucinations in animals and man.In: Hallucinations. Behavior, experience, and theory. Edited by Siegel, R.K., West, L.J. New York, NY: John Wiley & Sons.
Dictionary of Hallucinations. J.D. Blom. 2010.
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movie format of visual hallucinations — see slide show format of visual hallucinations … Dictionary of Hallucinations
akinetopsia — Also referred to as cerebral akinetopsia and visual motion blindness. The term akinetopsia comes from the Greek words akinesia (absence of motion) and opsis (seeing). It was introduced in or shortly before 1991 by the British neurobiologist… … Dictionary of Hallucinations