Anhedonia as a Transdiagnostic Phenomenon: Neurobiological, Clinical, and Therapeutic Approaches

Area of Science:

• Psychology
• Psychiatry
• Neuroscience

Background:

• Anhedonia, historically defined as the inability to experience pleasure, was introduced in 1897 by Théodule Armand Ribot.
• The original conceptualization of anhedonia as a simple dichotomy is insufficient for its complex, multidimensional nature.
• Hedonic experience is a dynamic, cyclical process influenced by an individual's hedonic tone, affecting their capacity for pleasure and happiness.

Purpose of the Study:

• To provide an expert clinical opinion on anhedonia phenotypes and their treatments.
• To synthesize existing evidence through a narrative review.
• To offer insights into managing anhedonia within psychopathological contexts.

Main Methods:

• A narrative review of existing literature.
• Synthesis of evidence on anhedonia phenotypes and treatments.
• Inclusion of three fictional clinical vignettes for illustration.

Main Results:

• Anhedonia is currently understood as a transdiagnostic, multidimensional, and dynamic construct.
• It comprises multiple attributes (valences) leading to diverse behavioral phenotypes.
• Anhedonia can manifest transiently or as a persistent trait, associated with increased disorder severity and suicide risk.

Conclusions:

• Anhedonia's complexity necessitates a multidimensional approach to understanding and treatment.
• Effective psychotherapeutic and pharmacological interventions are essential for managing anhedonia.
• Addressing anhedonia is critical due to its association with poorer prognosis and suicide risk in various disorders.