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Related Experiment Videos

Hallucinations: theoretical and clinical overview.

G Asaad, B Shapiro

    The American Journal of Psychiatry
    |September 1, 1986
    PubMed
    Summary
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    Hallucinations are not exclusive to schizophrenia and can appear in various disorders. An integrated approach considering biological and psychological factors is key to understanding their causes and presentation.

    Area of Science:

    • Neuroscience
    • Psychiatry
    • Psychology

    Background:

    • Hallucinations are complex phenomena studied across physiological, biochemical, and psychological domains.
    • Previous research often linked hallucinations predominantly with schizophrenia, a notion now challenged.
    • Understanding the multifaceted nature of hallucinations requires integrating diverse theoretical perspectives.

    Purpose of the Study:

    • To review existing literature on hallucinations.
    • To provide a theoretical background encompassing physiological, biochemical, and psychological viewpoints.
    • To examine the presentation of hallucinations across different diagnostic categories.

    Main Methods:

    • Comprehensive literature review.
    • Synthesis of theoretical frameworks from multiple scientific disciplines.

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  • Analysis of clinical presentations in relation to diagnostic classifications.

    • Main Results:

    • Hallucinations are not pathognomonic of any single disorder, though they may be relatively specific to certain conditions.
    • The long-held association of hallucinations solely with schizophrenia is unfounded.
    • No single etiological or pathogenetic mechanism fully explains hallucinations.

    Conclusions:

    • An integrated approach, incorporating biological vulnerability and psychological influences, is necessary for understanding hallucination etiology and presentation.
    • Hallucinations represent a transdiagnostic phenomenon.
    • Future research should focus on multifactorial models to elucidate the mechanisms underlying hallucinations.