This document provides an overview of mood disorders including manic episodes, depressive episodes, bipolar disorder, recurrent depressive episodes, and persistent mood disorder. It defines each condition and discusses their signs and symptoms, classification, etiology, diagnosis, and treatment. Mood disorders are characterized by disturbances in mood accompanied by depressive or manic syndromes not caused by other conditions. Treatment involves pharmacological interventions like mood stabilizers as well as psychosocial therapies such as cognitive behavioral therapy and family therapy.