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Difference between revisions of "Hallucination"

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Revision as of 00:26, 7 February 2008

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A hallucination is a sensation that occurs without the appropriate external stimuli. It can occur in any sensory modality such as auditory, visual, tactile, olfactory, or gustatory. Hallucinations may be caused by transient drug use, sleep deprivation or stress, medical illness, and are a prominent feature in some mental disorders such as schizophrenia.