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(p. 301) Depression 

(p. 301) Depression
Chapter:
(p. 301) Depression
Author(s):

Marco Del Giudice

DOI:
10.1093/med-psych/9780190246846.003.0014
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date: 26 October 2020

The chapter discusses depressive disorders, including major depressive disorder (MDD) and persistent depressive disorder (PDD) or dysthymia. These disorders are marked by severe, prolonged episodes of dejected mood and/or loss of interest and pleasure in rewarding activities (anhedonia), and may be accompanied by somatic symptoms involving sleep, appetite, and so on. After an overview of these disorders, their developmental features, and the main risk factors identified in the epidemiological literature, the chapter critically reviews existing evolutionary models and suggests new directions for research. The final section applies the criteria developed earlier in the book to classify the disorders within the fast-slow-defense (FSD) model. The author concludes that depressive disorders can be classified as a defense activation (D-type) conditions.

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