Aleman, André University Medical Centre Groningen, BCN Neuroimaging Centre, The Netherlands.
- Scope of hallucinations
- Hallucinations in the brain
- Top-down processing
- Magnetic stimulation
- Links to Primary Literature
- Additional Readings
A sensory experience that occurs in the absence of corresponding external stimulation of the relevant sensory organ(s). In addition, the hallucinatory experience has a sufficient sense of reality to resemble a veridical (genuine) perception and occurs when one is awake; furthermore, one does not feel that one has direct and voluntary control over it. Thus, for example, a person who is hallucinating sees things that are not there or hears voices when nobody in the vicinity is speaking. Although visual and auditory hallucinations are most common, hallucinations of taste, smell, and touch can also occur. The exact mechanisms underlying the experience of hallucination remain elusive, but significant strides have been made in uncovering processes in the mind and brain that are associated with hallucinations. See also: Cognition; Perception
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