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Chapter 2 - The Classification of Mood Disorders and the Unipolar/Bipolar Dichotomy

Published online by Cambridge University Press:  16 May 2024

By
Mutahira M. Qureshi  and
Allan Young
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
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Summary

The concept of abnormal mood has been a matter of a millennia-long debate in philosophy and medicine, while the diagnosis and classification of mood disorders remains a complex and controversial issue even in modern psychiatry. A centrepiece of this debate is the conceptualisation of mood and, by extension, mood disorders as a multi-dimensional spectrum with transdiagnostic symptoms (i.e., a continuous diagnostic classification) or as discrete nosological entities (i.e., a categorical diagnostic classification). Theoretical models and arguments based on empirical evidence have been proposed for both the distinct categorisation of abnormal mood states and the affective continuum perspective, which may also encompass psychosis and psychotic disorders. Although the conceptualisation of mood as a spectrum ranging from unipolar depression to unipolar mania may be the most suitable, this approach requires further evidence before it can replace the categorical classifications firmly employed in clinical practice for more than a century.

Keywords

mood disordersdepressionmaniaclassificationcategoricalspectrumdiagnosis
Type
Chapter
Information
Clinical Textbook of Mood Disorders , pp. 10 - 36
Publisher: Cambridge University Press
Print publication year: 2024

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