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9.9 - Psychosis

from 9 - Integrated Neurobiology of Specific Syndromes and Treatments

Published online by Cambridge University Press:  08 November 2023

By
Paul C. Fletcher
Edited by
Mary-Ellen Lynall ,
Peter B. Jones  and
Stephen M. Stahl
Mary-Ellen Lynall
Affiliation:
University of Cambridge
Peter B. Jones
Affiliation:
University of Cambridge
Stephen M. Stahl
Affiliation:
University of California, San Diego
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Summary

Psychosis refers to the state of having a set of experiences and beliefs that do not accord with accepted reality and that seem to arise and persist in ways that do not reflect the evidence available. It is important to remember that the term is descriptive and is not in itself a diagnosis. Indeed, it emerges across a wide range of psychiatric, neurological and other physical disorders as well, in various forms, as a consequence of stress, trauma, drug use and other perturbations to the nervous system. Moreover, attention has more recently focused on the existence of attenuated psychosis-like thinking distributed within the healthy population: a phenomenon that has long been recognised (Taine, 1871) and that become a focus for systematic study more recently (e.g. van Os et al., 2009).

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Chapter
Information
Cambridge Textbook of Neuroscience for Psychiatrists , pp. 456 - 466
Publisher: Cambridge University Press
Print publication year: 2023

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