Science / Psychiatry / Hallucination: false sensory perception in the absence of a real external stimulus. It is perceived as being located in objective space and as having the same realistic qualities as normal perceptions. It is not subject to conscious manipulation and only indicates a psychotic disturbance when there is also impaired reality testing. Hallucinations may be seen, heard, touched, tasted, or smelled by the ill individual. The term hallucination is not ordinarily applied to the false perceptions that occur during dreaming, while falling asleep (hypnagogic), or when awakening (hypnopompic). Transient hallucinatory experiences may occur in people without a mental disorder.
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Other Words for Hallucination

Hallucination Verb Synonyms: fantasy, mirage, day-dream, illusion, delusion, vision, dream, aberration, chimera, phantasm, phantom, figment of the imagination, apparition, spectre, ghost, par�sthesia

Reflex Hallucination

Science / Psychiatry / Reflex Hallucination: stimulus in one sensory field leads to a hallucination in another sensory field MORE

Somatic Hallucination

Science / Psychiatry / Somatic Hallucination: A hallucination involving the perception of a physical experience localized within the body (such as a feeling of electricity). A somatic hallucination is to be distinguished from physical sensations MORE

Tactile Hallucination

Science / Psychiatry / Tactile Hallucination: A hallucination involving the perception of being touched or of something being under ones skin. The most common tactile hallucinations are the sensation of electric shocks and formication (the sensat MORE