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Chapter 8 - Mood and Psychosis: Limits and Overlapping between Psychotic Disorders and Mood Disorders

Published online by Cambridge University Press:  16 May 2024

By
Fiona Gaughran
Edited by
Allan Young ,
Marsal Sanches ,
Jair C. Soares  and
Mario Juruena
Allan Young
Affiliation:
Institute of Psychiatry, King's College London
Marsal Sanches
Affiliation:
Baylor College of Medicine, Texas
Jair C. Soares
Affiliation:
McGovern Medical School, The University of Texas
Mario Juruena
Affiliation:
King's College London
Get access

Summary

‘Psychotic disorders’ is an umbrella term for psychiatric conditions featuring psychosis, including mood disorders. Despite the prominence of psychotic symptoms across the psychotic spectrum, a distinction between schizophrenia and affective psychoses has been historically established. Findings from genetic studies support the aetiological overlap between affective and non-affective psychosis, although poor characterisation of the schizoaffective population still poses a challenge. Likewise, literature points to shared environmental risk factors between bipolar disorder and schizophrenia. Neuroimaging evidence suggest significant similarities in the pathophysiology of the brain between affective and non-affective psychosis. An overlap is also observed in other biological and behavioural illness markers, as well as in the pharmacotherapy of psychotic disorders. Current diagnostic entities may not accurately delineate the aetiology and pathophysiology of these conditions. Modern classification approaches, such as the RDoC framework, propose the adoption of aetiological factors and pathophysiological evidence to characterise patients, rather than categorical diagnoses based on symptoms.

Keywords

psychotic disordersmood disordersschizophreniaaffective psychosisclassificationaetiologypathophysiology
Type
Chapter
Information
Clinical Textbook of Mood Disorders , pp. 82 - 94
Publisher: Cambridge University Press
Print publication year: 2024

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