Hallucination - Possible causes

A hallucination is a sensory perception experienced in the absence of an external stimulus, as distinct from an illusion, which is a misperception of an external stimulus. Hallucinations may occur in any sensory modality - visual, auditory, olfactory, gustatory, tactile, or mixed. Hallucination - Origins of the word. The word 'hallucinatory' has its roots in the Latin hallucinere or allucinere, meaning 'to wander in mind'. Altenatively in the Greek Including:

• Hallucination - Origins of the word
• Hallucination - Possible causes

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Florid hallucinations are usually associated with drug use (particularly hallucinogenic drugs), sleep deprivation, psychosis or neurological illness. However, studies have shown that hallucinatory experiences take place across the population as a whole. Previous studies, one as early as 1894[1], have reported that approximately 10% of the population experience hallucinations. A recent survey of over 13,000 people^{See also:}

Hallucination, Hallucination - Origins of the word, Hallucination - Possible causes

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