title: Hallucinations: Etiology and clinical implications.
abstract: The literature on hallucinations is reviewed, including history; theoretical background from physiological, biochemical and psychological points of view; classification; causation; presentation in different psychiatric and neurological disorders and in normal persons. The available evidence suggests that hallucinations result from a failure of the metacognitive skills involved in discriminating between self-generated and external sources of information. Management of hallucinations is briefly discussed.
authors.affiliation: Department of Psychiatry, Ranchi Institute of Neuropsychiatry and Allied Sciences, Kanke, Ranchi, Jharkhand, India.
authors.forename: Santosh
authors.initials: S
authors.lastname: Kumar
authors.forename: Subhash
authors.initials: S
authors.lastname: Soren
authors.forename: Suprakash
authors.initials: S
authors.lastname: Chaudhury