Depressive disorders

Abstract

Depressive disorders are a group of mood disorders that encompass Major Depressive Disorder (MDD), Persistent Depressive Disorder (Dysthymia), and other specified depressive disorders, significantly impacting individuals' emotional, social, and occupational functioning. This chapter outlines the key features, underlying mechanisms, and treatment strategies associated with depressive disorders. The etiology of depressive disorders is multifactorial, involving genetic, neurobiological, psychosocial, and environmental factors. Family studies indicate a heritable component, while neurobiological research has identified dysregulation in neurotransmitter systems, particularly serotonin, norepinephrine, and dopamine. Additionally, psychological theories highlight the role of cognitive distortions and negative thinking patterns as contributing factors. Treatment strategies for depressive disorders typically involve a combination of pharmacotherapy and psychotherapy. Antidepressant medications, including selective serotonin reuptake inhibitors (SSRIs), serotonin-norepinephrine reuptake inhibitors (SNRIs), and atypical antidepressants, are commonly prescribed to address biochemical imbalances. Psychotherapeutic approaches, such as Cognitive Behavioral Therapy (CBT) and interpersonal therapy, provide effective frameworks for addressing maladaptive thought patterns and improving coping mechanisms.